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june 2009 doc id 12668 rev 2 1/45 1 TDA7512F fm car-radio tuner ic with inte lligent selectivity system (iss) features fm part rf agc generation by rf and if detection i/q mixer for 1 st fm if 10.7 mhz with image rejection 2 programmable if-gain stages mixer for 2 nd if 450 khz internal 450 khz bandpass filter with three bandwidths controlled by iss fully integrated fm-demodulator with noise cancellation additional features vco for world tuning range high performance fast pll for rds-system if counter with search stop signal quality detector for leve l, deviation, adjacent channel and multipath quality detection info rmations as analog signals external available iss (intelligent selectivity system) for cancellation of adjacent channel and noise influences adjacent channel mute fully electronic alignment all functions i 2 c bus controlled description the TDA7512F is a high performance tuner circuit for fm car-radio. it contains mixer, if amplifier, demodulator, quality detection, iss filter and pll synthesizer with if counter on a single chip. use of bicmos technology allows the implementation of several tuning functions and a minimum of external components. lqfp64 table 1. device summary order code package packing e-TDA7512F lqfp64 tray e-TDA7512Ftr lqfp64 tape and reel www.st.com
contents TDA7512F 2/45 doc id 12668 rev 2 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1 mixer 1, agc and 1.if . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.2 mixer 2, limiter and demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3 quality detection and iss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3.1 fieldstrength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3.2 adjacent channel detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.3.3 multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.3.4 450 khz if narrow bandpass filter (iss filter) . . . . . . . . . . . . . . . . . . . . 18 4.3.5 deviation detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.3.6 iss switch logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.4 soft mute control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.5 pll and if counter section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.5.1 pll frequency synthesizer block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.5.2 frequency generation for phase comparison . . . . . . . . . . . . . . . . . . . . 19 4.5.3 three state phase comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.5.4 charge pump current generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.5.5 inlock detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.5.6 low noise cmos op-amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.5.7 if counter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.5.8 sampling timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.5.9 intermediate frequency main counter . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.5.10 adjustment of the measurement sequence time . . . . . . . . . . . . . . . . . . 21 4.5.11 adjust of the frequency value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6 i 2 c bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6.1 data transition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TDA7512F contents doc id 12668 rev 2 3/45 4.6.2 start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6.3 stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6.4 acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6.5 data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.6.6 device addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.6.7 write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.6.8 read operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5 software specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1 address organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.2 control register function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.3 data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 appendix a block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 appendix b application notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
list of tables TDA7512F 4/45 doc id 12668 rev 2 list of tables table 2. pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 3. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 4. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 5. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 6. address organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 table 7. control register function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 table 8. subaddress. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 table 9. addr 0 charge pump control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 table 10. addr 1 pll counter 1 (lsb) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 11. addr 2 pll counter 2 (msb). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 12. addr 3,4 tv1,2 (offset refered to tuning voltage pin 28) . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 13. addr 5 if counter control 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 14. addr 6 if counter control 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 15. addr 7 not valid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 16. addr 8 quality iss filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 17. addr 9 quality detection adjacent channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 18. addr 10 quality detection multipath. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 19. addr 11 quality deviation detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 table 20. addr 12 soft mute control 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 table 21. addr 13 soft mute control 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 22. addr 14 vcodiv/pllref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 23. addr 15 fm agc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 24. addr 16 not valid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 25. addr 17 fm demodulator fine adjust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 26. addr 18 s-meter slider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 27. addr 19 if gain/xtal adjust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 28. addr 20 tank adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 29. addr 21 i/q mixer 1 adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 30. addr 22 test control 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 31. addr 23 test control 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 32. addr 24 test control 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 33. addr 25 test control 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 34. block diagram quality detection principle (witho ut overdeviation correction) . . . . . . . . . . . 41 table 35. input signals modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 table 36. part list (application- and measurment circuit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 37. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
TDA7512F list of figures doc id 12668 rev 2 5/45 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 2. pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 3. interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 4. lqfp64 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 figure 5. block diagram i/q mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 figure 6. block diagram vco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 figure 7. block diagram keying agc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 figure 8. block diagram iss function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 figure 9. application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
block diagram TDA7512F 6/45 doc id 12668 rev 2 1 block diagram figure 1. block diagram
TDA7512F pin description doc id 12668 rev 2 7/45 2 pin description figure 2. pin connection (top view) table 2. pin description pin # pin name function 1 nu not used - to be left open 2 nu not used - to be left open 3 nu not used - to be left open 4 nu not used - to be left open 5 nu not used - to be left open 6 pindr pin diode driver output 7 mix1in1 input1 mixer1 8 gndrf rf ground 9 mix1in2 input2 mixer1 10 agctc agc time constant 11 tv1 tuning voltage preselection1 12 tv2 tuning voltage preselection2 13 adjch ident. adjacent channel output 14 fsu unweighted fieldstrength output 15 isstc time constant for iss filter switch
pin description TDA7512F 8/45 doc id 12668 rev 2 16 vccvco vco supply 17 gndvco vco ground 18 vcob vco input base 19 vcoe vco output emitter 20 devtc deviation detector time constant 21 xtalg xtal oscillator to mos gate 22 xtald xtal oscillator to mos drain 23 gndvcc3 vcc3 ground 24 sstop search stop output 25 sda i 2 c-bus data 26 scl i 2 c-bus clock 27 vcc3 supply tuning voltage 28 lpout op amp output to pll loop filters 29 vref2 voltage reference for pll op amp 30 nu not used - to be left open 31 lpf op amp input to pll loop filter 32 lphc high current pll loop filter input 33 gndvcc1 digital ground 34 mp ident. multipath output 35 fsw weighted fieldstrength output 36 vcc1 digital supply 37 mpx mpx output 38 nu not used - to be left open 39 nu not used - to be left open 40 nu not used - to be left open 41 iicaddr hardwired iic-address pin 42 mutetc softmute time constant 43 nu not used - to be left open 44 refdemc demodulator reference 45 mix2in2 mix2 input1 46 mix2in1 mix2 input2 47 gnddem ground demodulator 48 vref1 reference 5v 49 gndvcc2 analog ground 50 if1amp2out if1 amplifier2 output table 2. pin description (continued) pin # pin name function
TDA7512F pin description doc id 12668 rev 2 9/45 51 vcc2 analog supply 52 if1amp2in if1 amplifier2 input 53 if1ref if1 amplifier reference 54 if1amp1out if1 amplifier1 output 55 nc not used - has to be connected versus vcc2 56 nc not used - has to be connected versus vcc2 57 if1amp1in if1 amplifier1 input 58 issstatus iss filter status 59 gndif1 if1 ground 60 ifagcin if agc input 61 vccif1 if1 supply 62 nu not used - to be left open 63 mix1out2 mix tank 10.7mhz 64 mix1out1 mix tank 10.7mhz table 2. pin description (continued) pin # pin name function
electrical specifications TDA7512F 10/45 doc id 12668 rev 2 3 electrical specifications 3.1 thermal data 3.2 absolute maximum ratings 3.3 electrical characteristics t amb = +25 c, v cc1 = v cc2 = v cc3 = v ccvco = v ccmix1 = v ccif1 = 8.5 v, f rf = 98 mhz, dev. = 40 khz, f mod = 1 khz, f if1 = 10.7 mhz, f if2 = 450 khz, f xtal = 10.25 mhz, in application circuit, unless otherwise specified. table 3. thermal data symbol parameter value unit r th(j-amb) thermal resistance junction-to-ambient 68 max. c/w table 4. absolute maximum ratings symbol parameter value unit v s supply voltage 10.5 v t amb ambient temperature -40 to 85 c t stg storage temperature -55 to +150 c table 5. electrical characteristics symbol parameter test conditions min. typ. max. unit supply v cc1 digital supply voltage - 7.5 8.5 10 v v cc2 analog supply voltage - 7.5 8.5 10 v v cc3 analog tuning voltage - 7.5 8.5 10 v v ccvco vco supply voltage - 7.5 8.5 10 v v ccmix1 mix1 supply voltage - 7.5 8.5 10 v v ccif1 if1 supply voltage - 7.5 8.5 10 v i cc1 supply current - - 7.5 - ma i cc2 supply current vco:3 - 70 - ma i cc3 supply current - - 2 - ma i ccvco supply current - - 9 - ma i ccmix1 supply current - - 8 - ma i ccif1 supply current - - 6 - ma
TDA7512F electrical specifications doc id 12668 rev 2 11/45 reference voltages v ref1 internal reference voltage i ref1 = 0 ma - 5 - v v ref2 internal reference voltage i ref2 = 0 ma - 2.5 - v wide band rf agc v 7-9 lower threshold start v 10 = 2.5 v - 85 - dbv v 7-9 upper threshold start v 10 = 2.5 v - 96 - dbv narrow band if & keying agc v 60 lower threshold start kagc = off, v 7-9 = 0 mv rms - 86 - dbv v 60 upper threshold start kagc = off, v 7-9 = 0 mv rms - 98 - dbv v 60 lower threshold start with kagc kagc = max, v 7-9 = 0 mv rms, f if = 300 khz - 98 - dbv v 35 start point kagc kagc = max, v 7-9 = 0 mv rms, f if = 300 khz f if1 generate fsw level at v 35 -3.6- v d control range kagc v 35 = +0.4 v - 16 - db r in input resistance - - 10 - k c in input capacitance - - 2.5 - pf agc time constant output v 10 max. agc output voltage v 7-9 = 0 mv rms - v ref1 +v be v v 10 min. agc output voltage v 7-9 = 50 mv rms -0.5v i 10 min. agc charge current v 7-9 = 0 mv rms ,; v 10 = 2.5 v - -12.5 - a i 10 max. agc discharge current v 7-9 = 50 mv rms ,; v 10 = 2.5 v - 1.25 - ma agc pin diode driver output i 6 agc out, current min. v 7-9 = 0 mv rms , v 6 = 2.5 v - 50 - a i 6 agc out, current max. v 7-9 = 50 mv rms , v 6 = 2.5 v - -20 - ma i/q mixer 1 (10.7mhz) r in input resistance differential - 10 - k c in input capacitance differential - 4 - pf r out output resistance differential 100 - k v 7,9 input dc bias - - 3.2 - v g m conversion transconductance --17-ms f noise figure 400 generator resistance - 3 - db table 5. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
electrical specifications TDA7512F 12/45 doc id 12668 rev 2 cp 1db 1db compression point referred to diff. mixer input - 100 - dbv iip3 3 rd order intermodulation - - 122 - dbv iqg i/q gain adjust g -1 - +1 % iqp i/q phase adjust ph -7 - +8 deg irr image rejection ratio ratio wanted/image 30 40 - db irr image rejection ratio with gain and phase adjust 40 46 - db if1 amplifier1,2 (10.7 mhz) g1 min min. gain ifg, referred to 330 -9-db g1 max max. gain ifg, referred to 330 -15-db g2 min min. gain ifg, referred to 330 -9-db g2 max max. gain ifg, referred to 330 -11-db r in input resistance - - 330 - r out output resistance - - 330 - cp 1db 1db compression point referred to 330 input - 105 - dbv iip3 3rd order intermodulation referred to 330 input - 126 - dbv mixer 2 (450 khz) r in input impedance - - 330 - w v 46 max. input voltage - - 900 - mv rms v 48 limiting sensitivity s/n = 20db - 25 - v g mixer gain - - 18 - db limiter 1 (450 khz) g limiter gain - - 80 - db demodulator, audio output thd total harmonic distortion dev.= 75 khz, v 46 = 10 mv rms --0.1% v mpx mpx output signal dev.= 75 khz - 500 - mv rms r out output resistance - - 50 - | v| min dc offset fine adjust dem, mena = 1 - 8.5 - mv | v| max dc offset fine adjust dem, mena = 1 - 264 - mv s/n signal to noise dev.= 40 khz,v 46 = 10 mv rms -76-db quality detection s-meter, unweight ed fieldstrength v 46 min. input voltage mix2 - - 10 - v v 14 fieldstrength output v 46 = 0 v rms -0.1- v table 5. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
TDA7512F electrical specifications doc id 12668 rev 2 13/45 v 14 fieldstrength output v 46 = 1 v rms -4.9- v v 14 voltage per decade smsl = 0 - 1 - v v 14 voltage per decade smsl = 1 - 1.5 - v v 14 s-meter offset sl, smsl=1 -15 15 db r out output resistance - - 200 - w tk temp coeff. - - 0 - ppm/k s-meter, weighted fieldstrength v 35 fieldstrength output v 46 = 0 v rms -2.5- v v 35 fieldstrength output v 46 = 1 v rms -4.9- v r out output resistance - - 12 - k adjacent channel gain g min gain minimum acg=0 - 32 - db g max gain maximum acg=1 - 38 - db adjacent channel filter f hp -3db frequency highpass acf=0 - 100 - khz f bp centre frequency acf=1 - 100 - khz f -20db attenuation 20db - - 70 - khz adjacent channel output v 13 output voltage low - - 0.1 - v v 13 output voltage high - - 4.9 - v r out output resistance - - 4 - k multipath channel gain g min gain minimum mpg=0 - 12 - db g max gain maximum mpg=1 - 23 - db multipath bandpass filter f lower centre frequency low mpf=0 - 19 - khz f upper centre frequency up mpf=1 - 31 - khz q quality factor - 5 10 - multipath output v 34 output voltage low - - 0.1 - v v 34 output voltage high - - 4.9 - v r out output resistance - - 2.5 - k table 5. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
electrical specifications TDA7512F 14/45 doc id 12668 rev 2 iss (intelligent selectivity system) filter 450 khz f centre centre frequency f ref_intern = 450 khz - 450 - khz bw 3db bandwidth, -3db iss80 = 1 - 80 - khz bw 20db bandwidth, -20db iss80 = 1 - 150 - khz bw 3db bandwidth, -3db iss80 = 0 - 120 - khz bw 20db bandwidth, -20db iss80 = 0 - 250 - khz bw 3db bandwidth weather band iss30 = 1 - 30 - khz bw 20db -20db weather band iss30 = 1 - 80 - khz adjacent channel iss filter threshold v nth internal low threshold acnth - 0 - v v nth internal high threshold acnth - 0.3 - v v wth internal low threshold acwth - 0.25 - v v wth internal high threshold acwth - 0.95 - v multipath threshold v thmp internal low threshold mpth - 0.50 - v v thmp internal high threshold mpth - 1.25 - v iss filter time constant i 15 charge current low mid t iss, issctl = 1 - -74 - a i 15 charge current high mid tis s, issctl = 1 - -60 - a i 15 charge current low narrow t iss, issctl = 1 - -124 - a i 15 charge current high narrow tiss, issctl = 1 - -110 - a i 15 discharge current low tiss, issctl = 0 - 1 - a i 15 discharge current high tiss, issctl = 0 - 15 - a v 15 low voltage issctl = 0 - 0.1 - v v 15 high voltage issctl = 1 - 4.9 - v iss filter switch threshold v 15 threshold iss on issctl = 0 - 3 - v v 15 threshold iss off issctl = 0 - 1 - v v 15 threshold iss narrow on issctl = 0 - 4 - v v 15 threshold iss narrow off issctl = 0 - 2 - v i 20 charge current low tdev - -20 - a i 20 charge current high tdev - -34 - a table 5. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
TDA7512F electrical specifications doc id 12668 rev 2 15/45 i 20 discharge current low tdev - 6 - a i 20 discharge current high tdev - 20 - a dev wth internal low threshold dwth - 30 - khz dev wth internal high threshold dwth - 75 - khz ratio min referred to threshold dth - 1 - - ratio max referred to threshold dth - 1.5 - - softmute v ant upper startpoint smth, smd, slope = 0 - 10 - dbv v ant lower startpoint smth, smd, slope = 0 - 3 - dbv a smmin min. softmute depth smd, slope = 0, smth upper -18-db a smmax max. softmute depth smd, slope = 0, smth upper -36-db a smthiss mute depth threshold for iss filter on smcth 0.2 - 2 db v acth internal ac mute threshold acm 60 - 340 mv a smac ac mute depth acmd 4 - 10 db i 42 charge current - - -47.5 - a i 42 discharge current - - 2.5 - a s/n over all s/n signal to noise v ant_min = 60 dbv, dev.= 40 khz,lp=15 khz deemphasis t = 50 s 66 - - db additional parameters output of tuning voltages (tv1,tv2) v out output voltage tvo 0.5 - v cc3 - 0.5 v r out output impedance - - 20 - k xtal reference oscillator f lo reference frequency c load = 15 pf - 10.25 - mhz c step min. cap step xtal - 0.75 - pf c max max. cap xtal - 23.25 - pf f/f deviation versus vcc2 v cc2 = 1 v - 1.5 - ppm/v f/f deviation versus temp -40c < t < +85 c - 0.2 - ppm/k i 2 c bus interface f scl clock frequency - - - 400 khz v il input low voltage - - - - v table 5. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
electrical specifications TDA7512F 16/45 doc id 12668 rev 2 v ih input high voltage - 3 - - v i in input current - -5 - 5 a v o output acknowledge voltage i o = 1.6 ma - - 0.4 v loop filter input/output -i in input leakage current v in = gnd, pd out = tristate -0.1 - 0.1 a i in input leakage current v in = vref1 pd out = tristate -0.1 - 0.1 a v ol output voltage low i out = -0.2 ma - 0.05 0.5 v v oh output voltage high i out = 0.2 ma v cc3 - 0.5 v cc3 - 0.05 -v i out output current, sink v out = 1 v to v cc3 -1 v - - 10 ma i out output current, source v out = 1 v to v cc3 -1 v -10 - - ma voltage controlled oscillator (vco) f vcomin minimum vco frequency - 160 - - mhz f vcomax maximum vco frequency - - - 260 mhz c/n carrier to noise f vco = 200 mhz, f=1 khz, b=1 hz, closed loop -80-dbc sstop output (open collector) v 24 output voltage low i 24 = -200 a - 0.2 0.5 v v 24 output voltage high - - - 5 v -i 24 output leakage current v 24 = 5 v -0.1 - 0.1 a i 24 output current, sink v 24 = 0.5 - 5 v - - 1 ma issstatus output (open drain) v 58 output voltage low, iss- filter ?on? i 24 = -200 a - 0.2 0.5 v v 58 output voltage high, iss- filter ?off? ---5v -i 58 output leakage current v 24 = 5 v -0.1 - 0.1 a i 58 output current, sink v 24 = 0.5 - 5 v - - 300 a table 5. electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit
TDA7512F functional description doc id 12668 rev 2 17/45 4 functional description 4.1 mixer 1, agc and 1.if fm quadrature i/q-mixer converts rf to if1 of 10.7mhz. the mixer provides inherent image rejection and wide dynamic range with low noise and large input signal performance. the mixer1 tank can be adjusted by software (if1t). for accurate image rejection the gain- and phase-error generated as well in mixer as vco stage can be compensated by software (g,ph) it is capable of tuning the us fm, us weather, europe fm, japan fm and east europe fm bands us fm = 87.9 to 107.9 mhz us weather = 162.4 to 162.55 mhz europe fm = 87.5 to 108 mhz japan fm = 76 to 91 mhz east europe fm = 65.8 to 74 mhz the agc operates on different sensitivities and bandwidths in order to improve the input sensitivity and dynamic range. agc thresholds are programmable by software (rfagc,ifagc,kagc). the output signal is a controlled current for double pin diode attenuator. two 10.7 mhz programmable amplifiers (ifg1, ifg2) correct the if ceramic insertion loss and the costumer level plan application. 4.2 mixer 2, limiter and demodulator in this 2. mixer stage the first 10.7 mhz if is converted into the second 450 khz if. a multi- stage limiter generates signals for the complete integrated demodulator without external tank. mpx output dc offset versus noise dc level is correctable by software (dem). 4.3 quality detection and iss 4.3.1 fieldstrength parallel to mixer 2 input a 10.7 mhz limiter generates a signal for digital if counter and a fieldstrength output signal. this internal unwei ghted fieldstrength is used for keying agc, adjacent channel and multipath detection and is available at pin14 (fsu) after +6db buffer stage. the behaviour of this output signal can be corrected for dc offset (sl) and slope (smsl). the internal generated unweighted fieldstrength is filtered at pin35 and used for softmute function and generation of iss filter switching signal for weak input level (sm). 4.3.2 adjacent channel detector the input of the adjacent channel detector is ac coupled from internal unweighted fieldstrength. a programmable highpass or bandpass (acf) and amplifier (acg) as well as rectifier determines the influen ces. this voltage is compared with adjustable comparator1 thresholds (acwth, acnth). the output signal of this comparator generates a dc level at pin15 by programmable time constant. time control (tiss) for a present adjacent channel is made by charge and discharge current after comparator1 in an external capacitance. the
functional description TDA7512F 18/45 doc id 12668 rev 2 charge current is fixed and the discharge current is controlled by i 2 c bus. this level produces digital signals (ac, ac+) in an additional comparator4. the adjacent channel information is available as analog output signal after rectifier and +8 db output buffer. 4.3.3 multipath detector the input of the multipath detector is ac coupled from internal unweighted fieldstrength. a programmable bandpass (mpf) and amplifier (mpg) as well as rectifier determines the influences. this voltage is compared with an adjustable comparator2 thresholds (mpth). the output signal of this comparator 2 is used for the "milano" effect. in this case the adjacent channel detection is switched off. the "milano" effect is selectable by i 2 c bus (mpoff). the multipath information is available as analog output signal after rectifier and +8 db output buffer. 4.3.4 450 khz if narrow band pass filter (iss filter) the device gets an additional second if narrow bandpass filter for suppression of noise and adjacent channel signal influences. this narrow filter has three switchable bandwidthes, narrow range of 80 khz, mid range of 120 khz and 30 khz for weather band information. without iss filter the if bandwidth (wide range) is defined only by ceramic filter chain. the filter is switched in after mixer 2 before 450 khz limiter stage. the centre frequency is matching to the demodulator center frequency. 4.3.5 deviation detector in order to avoid distortion in audio output signal the narrow iss filter is switched off for present overdeviation. hence the demo dulator output signal is detected. a lowpass filtering and peak rectifier generates a signal that is defined by software controlled current (tdev) in an external capacitance. this value is compared with a programmable comparator3 thresholds (dwth, dth) and generates two digital signals (dev, dev+). for weak signal condition de viation threshold is proportinal to fsu. 4.3.6 iss switch logic all digital signals coming from adjacent channel detector, deviation detector and softmute are acting via switching matrix on iss filter switch. the if bandpass switch mode is controlled by software (isso n, iss30, iss80, ctloff). the switch on of the if bandpass is also available by external manipulation of the voltage at pin15. two application modes are available (appm). the conditions are described in table 34. 4.4 soft mute control the external fieldstrength signal at pin 35 is the reference for mute control. the startpoint and mute depth are programmable (smth, smd) in a wide range. the time constant is defined by external capacitance. additional ad jacent channel mute function is supported. a highpass filter with -3 db threshold frequency of 100 khz, amplifier and peak rectifier generates an adjacent noise signal from mpx output with the same time constant for
TDA7512F functional description doc id 12668 rev 2 19/45 softmute. this value is compared with comparator5 thresholds (acm). for present strong adjacent channel the mpx signal is additional attenuated (acmd). 4.5 pll and if counter section 4.5.1 pll frequency synthesizer block this part contains a frequency synthesizer and a loop filter for the radio tuning system. only one vco is required to build a complete pll system for fm world tuning . for auto search stop operation an if counter system is available. the counter works in a two stages configuration. the first stage is a swallow counter with a two modulus (32/33) precounter. the second stage is an 11-bit programmable counter. the circuit receives the scaling factors for the programmable counters and the values of the reference frequencies via an i 2 c bus interface.the reference frequency is generated by an adjustable internal (xtal) oscillator followed by the reference divide r. the main reference and step-frequencies are free selectable (rc, pc). output signals of the phase detector are switching the programmable current sources. the loop filter integrates their currents to a dc voltage. the values of the current sources are programmable by 6 bits also received via the i 2 c bus (a, b, currh). to minimize the noise induced by the di gital part of the system, a special guard configuration is implemented. the loop gain can be set for different conditions by setting the current values of the chargepump generator. 4.5.2 frequency generation for phase comparison the rf signals applies a two modulus counter (32/33) pre-scaler, which is controlled by a 5- bit a-divider. the 5-bit register (pc0 to pc4) controls this divider. in parallel the output of the prescaler connects to an 11-bit b-divider. the 11- bit pc register (pc5 to pc15) controls this divider dividing range: f vco = [33 x a + (b + 1 - a) x 32] x f ref f vco = (32 x b + a + 32) x f ref important: for correct operation: a 32; b a 4.5.3 three state phase comparator the phase comparator generates a phase error signal according to phase difference between f syn and f ref . this phase error signal drives the charge pump current generator. 4.5.4 charge pump current generator this system generators signed pulses of current. the phase error signal decides the duration and polarity of those pulses. the current absolute values are programmable by a register for high current and b register for low current.
functional description TDA7512F 20/45 doc id 12668 rev 2 4.5.5 inlock detector switching the chargepump in low current mode can be done either via software or automatically by the inlock detector, by setting bit ldena to "1". after reaching a phase difference about lower than 40nsec the chargepump is forced in low current mode. a new pll divider alternation by i 2 c-bus will switch the chargepump in the high current mode. 4.5.6 low noise cmos op-amp an internal voltage divider at pin vref2 connects the positive input of the low noise op- amp. the charge pump output connects the negative input. this internal amplifier in cooperation with external components can provide an active filter. while the high current mode is activated lphc output is switched on. 4.5.7 if counter block the aim of if counter is to measure the intermediate frequency of the tuner. the input signal is the 10.7mhz if level after limiter. the grade of integration is adjustable by eight different measuring cycle times. the tolerance of the accepted count value is adjustable, to reach an optimum compromise for search speed and precision of the evaluation. 4.5.8 sampling timer a sampling timer generates the gate signal for the main counter. the basically sampling time are in fm mode 6.25khz (t tim =160 s). this is followed by an asynchronous divider to generate several sampling times. 4.5.9 intermediate frequency main counter this counter is a 11 - 21-bit synchronous auto reload down counter. five bits (cf) are programmable to have the possibility for an adju st to the centre fre quency of the if-filter. the counter length is automatic adjusted to the chosen sampling time. at the start the counter will be loaded with a defined value which is an equivalent to the divider value (t sample xf if ). if a correct frequency is applied to the if counter frequency input at the end of the sampling time the main counter is changing its state from 0h to 1fffffh. this is detected by a control logic and an external search stop output is changing from low to high. the frequency range inside which a successful count result is adjustable by the ew bits. counter result succeeded: t tim t cnt - t err t tim t cnt + t err counter result failed: t tim > t cnt + t err t cnt cf 1696 1 ++ f if ------------------------------------- =
TDA7512F functional description doc id 12668 rev 2 21/45 t tim < t cnt - t err t tim = if timer cycle time (sampling time) t cnt = if counter cycle time t err = discrimination window (controlled by the ew registers) the if counter is only started by inlock information from the pll part. it is enabled by software (ifena). 4.5.10 adjustment of the measurement sequence time the precision of the measurements is adjustable by controlling the discrimination window. this is adjustable by programming the control registers ew. the measurement time per cycle is adjustable by setting the registers ifs. 4.5.11 adjust of the frequency value the center frequency of the discrimination window is adjustable by the control registers cf. 4.6 i 2 c bus interface the TDA7512F supports the i 2 c bus protocol. this protocol defines any device that sends data onto the bus as a transmitter, and the receiving device as the receiver. the device that controls the transfer is a master and device being controlled is t he slave. the master will always initiate data transfer and provide the clock to transmit or receive operations. 4.6.1 data transition data transition on the sda line must only occur when the clock scl is low. sda transitions while scl is high will be interpreted as start or stop condition. 4.6.2 start condition a start condition is defined by a high to low transition of the sda line while scl is at a stable high level. this "start" condition must precede any command and initiate a data transfer onto the bus. the device continuously monitors the sda and scl lines for a valid start and will not response to any command if this condition has not been met. 4.6.3 stop condition a stop condition is defined by a low to high transition of the sda while the scl line is at a stable high level. this condition terminat es the communication between the devices and forces the bus-interface of the de vice into the in itial condition. 4.6.4 acknowledge indicates a successful data transfer. the transmitter will release the bus after sending 8 bits of data. during the 9 th clock cycle the receiver will pull the sda line to low level to indicate it receive the eight bits of data.
functional description TDA7512F 22/45 doc id 12668 rev 2 4.6.5 data transfer during data transfer the device samples the sda line on the leading edge of the scl clock. therefore, for proper device operation the sda line must be stable during the scl low to high transition. 4.6.6 device addressing to start the communication between two devices, the bus master must initiate a start instruction sequence, followed by an eight bit word corresponding to the address of the device it is addressing. the most significant 6 bits of the slave address are the device type identifier. the TDA7512F device type is fixed as "110001". the next significant bit is used to address a particular device of the previous defined type connected to the bus. the state of the hardwired pin 41 defines the state of this address bit. so up to two devices could be connected on the same bus. when pin 41 is connected to vcc2 the address bit ?1? is selected. when pin 41 is left open the address bit ?0? is selected. therefor a double fm tuner concept is possible. the last bit of the start instruction defines the type of operation to be performed: ? when set to "1", a read operation is selected ? when set to "0", a write operation is selected the TDA7512F connected to the bus will compare their own hardwired address with the slave address being transmitted, after detecting a start condition. after this comparison, the TDA7512F will generate an "ack nowledge" on the sda line a nd will do either a read or a write operation according to the state of r/w bit. 4.6.7 write operation following a start condition the master sends a slave address word with the r/w bit set to "0". the device will generate an "acknowledge" a fter this first transmission and will wait for a second word (the word address field). this 8-bit address field provides an access to any of the 32 internal addresses. upon receipt of the word address the TDA7512F slave device will respond with an "acknowledge". at this time, all the followin g words transmitted to the TDA7512F will be considered as data. the internal address will be automatically incremented. after each word receipt the TDA7512F will answer with an "acknowledge". 4.6.8 read operation if the master send s a slave address word with the r/w bit set to "1", the TDA7512F will transit one 8-bit data word. this data word includes the following informations: bit0 (iss filter, 1 = on, 0 = off) bit1 (iss filter bandwidth, 1 = 80khz, 0 = 120khz) bit2 (mpout,1 = multipath present, 0 = no multipath)
TDA7512F functional description doc id 12668 rev 2 23/45 bit3 (1 = pll is locked in , 0 = pll is locked out). bit4 (fieldstrength indicator, 1 = lower as softmute threshold, 0 = higher as softmute threshold) bit5 (adjacent channel indicator, 1 = adjacent channel present, 0 = no adjacent channel) bit6 (deviation indicator, 1 = strong overdeviation present, 0 = no strong overdeviation) bit7 (deviation indicator, 1 = overdeviation present, 0 = no overdeviation)
software specification TDA7512F 24/45 doc id 12668 rev 2 5 software specification the interface protocol comprises: ? start condition (s) ? chip address byte ? subaddress byte ? sequence of data (n bytes + acknowledge) ? stop condition (p) figure 3. interface protocol s = start p = stop ack = acknowledge d = device address x = r/w bit i = pagemode a = subaddress 5.1 address organization table 6. address organization functionaddr76543210 chargepu mp 0 ldena currh b1 b0 a3 a2 a1 a0 pll counter 1 pc7 pc6 pc5 pc4 pc3 pc2 pc1 pc0 2 pc15 pc14 pc13 pc12 pc11 pc10 pc9 pc8 tv1 3 tv1o7 tv1o6 tv1o5 tv1o4 tv1o3 tv1o2 tv1o1 tv1o0 tv2 4 tv2o7 tv2o6 tv2o5 tv2o4 tv2o3 tv2o2 tv2o1 tv2o0 ifc ctrl 1 5 lm casf - - ifena ifs2 ifs1 ifs0 ifc ctrl 2 6 ew2 ew1 ew0 cf4 cf3 cf2 cf1 cf0 not valid7-------- qualityiss 8 tiss2 tiss1 tiss0 tv wb iss30 iss80 isson ctloff quality ac 9 acnth1 acnth0 acwth2 acwth1 acwth0 acg acf - quality mp 10 mpac appm2 appm1 mpth1 mpth0 mpg mpf mpoff
TDA7512F software specification doc id 12668 rev 2 25/45 5.2 control register function qualitydev 11 bwctl dth1 dth 0 dwth1 dwth0 tdev2 tdev1 tdev0 mute1 12 mena smd3 smd2 smd1 smd0 smth2 smth1 smth0 mute2 13 f100k acm3 acm2 acm1 acm0 acmd1 acmd0 smcth vco/pllref 14 - - rc2 rc1 rc0 vcod2 vcod1 vcod0 fmagc 15 - kagc2 kagc1 kagc0 ifagc1 ifagc0 rfagc1 rfagc0 not valid16-------- dem adj 17 dnb1 dnb0 dem5 dem4 dem3 dem2 dem1 dem0 level 18 odsw - smsl sl4 sl3 sl2 sl1 sl0 if1/xtal 19 xtal4 xtal3 xtal2 xtal1 xtal0 ifg11 ifg10 ifg2 tank adj 20 if1t3 if1t2 if1t1 if1t0 - - - - i/q adj 21 odcur - g1 g0 ph3 ph2 ph1 ph0 testctrl1 22 - issin tout t in clksep test3 test2 test1 testctrl2 23 out7 out6 out5 out4 out3 out2 out1 out0 testctrl3 24 - tinacm tinmp tinac out11 out10 out9 out8 testctrl4 25 - - - out16 out15 out14 out13 out12 table 6. address organization (continued) functionaddr76543210 table 7. control register function register name function a charge pump high current acf adjacent channel filter select acg adjacent channel filter gain acm threshold for startpoint adjacent channel mute acmd adjacent channel mute depth acnth adjacent channel narrow band threshold acwth adjacent channel wide band threshold appm application mode quality detection b charge pump low current bwctl iss filter fixed bandwith (iss80) in automatic control casf check alternative station frequency cf center frequency if counter clksep clock separation (only for testing) ctloff switch off automati c control of iss filter currh set current high charge pump
software specification TDA7512F 26/45 doc id 12668 rev 2 dem demodulator offset dnb demodulator noise spike blanking dth deviation detector threshold for iss filter ?off? dwth deviation detector threshold for iss filter narrow/wide ew frequency error window if counter f100k corner frequency of ac-mute high pass filter g i/q mixer gain adjust if1t miixer1 tank adjust ifagc if agc ifena if counter enable ifg if1 amplifier gain (10.7mhz) ifs if counter sampling time issin test input for iss filter isson iss filter ?on? iss30 iss filter 30khz weather band iss80 iss filter narrow/mid switch kagc keying agc ldena lock detector enable lm local mode seek stop mena softmute enable mpac adjacent channel control by multipath mpf multipath filter frequency mpg multipath filter gain mpoff multipath control ?off? mpth multipath threshold odcur current for overdeviation-correction odsw overdeviation-correction enable out test output (only for testing) pc counter for pll (vco frequency) ph i/q mixer phase adjust rc reference counter pll rfagc rf agc sl s meter slider smcth softmute capacitor threshold for iss ?on? smd softmute depth threshold table 7. control register function (continued) register name function
TDA7512F software specification doc id 12668 rev 2 27/45 5.3 data byte specification smsl s meter slope smth softmute startpoint threshold tdev time constant for deviation detector test testing pll/ifc (only for testing) tin switch fsu pin to test input (only for testing) tinac test input adjacent channel (only for testing) tinacm test input adjacent channel mute (only for testing) tinmp test input multipath(only for testing) tiss time constant for iss filter ?on?/?off? tout switch fsu pin to test output (only for testing) tvo tuning voltage offset for prestage tvwb tuning voltage offset for prestage (weather band mode) vcod vco divider xtal xtal frequency adjust table 7. control register function (continued) register name function table 8. subaddress msb lsb function - - i a4a3a2a1a0 - - - 00000charge pump control - - - 00001pll lock detector --------- - - - 10101i/q adj --0-----page m ode ?off? --1-----page m ode enable table 9. addr 0 charge pump control msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - - - 0 0 0 0 high current = 0 ma - - - - 0 0 0 1 high current = 0.5 ma - - - - 0 0 1 0 high current = 1 ma - - - - 0 0 1 1 high current = 1.5 ma ---------
software specification TDA7512F 28/45 doc id 12668 rev 2 note: swallow mode: f vco /f syn = lsb + msb + 32 - - - - 1 1 1 1 high current = 7.5 ma --00----low current = 0 a - - 0 1 - - - - low current = 50 a - - 1 0 - - - - low current = 100 a - - 1 1 - - - - low current = 150 a -0------select low current -1------select high current 0 - - - - - - - lock detector disable 1-------lock detector enable table 9. addr 0 charge pump control (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 10. addr 1 pll counter 1 (lsb) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000lsb = 0 00000001lsb = 1 00000010lsb = 2 --------- 11111100lsb = 252 11111101lsb = 253 11111110lsb = 254 11111111lsb = 255 table 11. addr 2 pll counter 2 (msb) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000msb = 0 00000001msb = 256 00000010msb = 512 --------- 11111100msb = 64768 11111101msb = 65024 11111110msb = 65280 11111111msb = 65536
TDA7512F software specification doc id 12668 rev 2 29/45 table 12. addr 3,4 tv1,2 (offset refered to tuning voltage pin 28) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - 0000000tuning voltage offset = 0 - 0000001tvo = 25mv - 0000010tvo = 50mv --------- - 1111111tvo = 3175mv 0--------tvo 1-------+tvo table 13. addr 5 if counter control 1 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 -----000t sample = 20.48 ms (fm)128 ms (am ) -----001t sample = 10.24 ms (fm)64 ms (am ) -----010t sample = 5.12 ms (fm)32 ms (am ) -----011t sample = 2.56 ms (fm)16 ms (am ) -----100t sample = 1.28 ms (fm)8 ms (am ) -----101t sample = 640 s (fm)4 ms (am ) -----110t sample = 320 s (fm)2 ms (am) -----111t sample = 160 s (fm)1 ms (am ) - - - - 0 - - - if counter disable / stand by - - - - 1 - - - if counter enable --01----has to be set - 0 - - - - - - disable mute & agc on hold -1------enable mute & agc on hold 0 - - - - - - - disable local mode 1 - - - - - - - enable local mode (pin diode current = 0.5 ma) ?on? table 14. addr 6 if counter control 2 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - - 00000f center = 10.60625 mhz - - - 00001f center = 10.61250 mhz --------- - - - 01011f center = 10.67500 mhz
software specification TDA7512F 30/45 doc id 12668 rev 2 - - - 01100f center = 10.68125 mhz - - - 01101f center = 10.68750 mhz - - - 01110f center = 10.69375 mhz - - - 01111f center = 10.70000 mhz --------- - - - 11111f center = 10.80000 mhz 000-----not valid 001-----not valid 010-----not valid 011----- f = 6.25khz 100----- f = 12.5khz 101----- f = 25khz 110----- f = 50khz 111----- f = 100khz table 14. addr 6 if counter control 2 (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 15. addr 7 not valid msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 00000000 has to be set table 16. addr 8 quality iss filter msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - ------0iss filter control ?on? ------1iss filter control ?off? - -----0-switch iss filter ?off? - -----1-switch iss filter ?on? - - - - - 0 - - switch ?off? iss filter 120khz - - - - - 1 - - switch ?on? iss filter 80khz - - - - 0 - - - switch ?off? iss filter 30khz for weatherband - - - - 1 - - - switch ?on? iss filter 30khz for weatherband - - - 0 - - - - disable tv offset for weather band - - - 1 - - - - enable tv offset for weather band (+4v) 000---- -discharge current1 a, charge current mid 74 ? narrow124 ?
TDA7512F software specification doc id 12668 rev 2 31/45 001---- - discharge current 3a, charge current mid 72a narrow 122a 010---- - discharge current 5a, charge current mid 70 a narrow 120a 011---- - discharge current 7a, charge current mid 68a narrow 118a - ------ -- 111---- - discharge current 15a,charge current mid 60a narrow 110a table 16. addr 8 quality iss filter (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 17. addr 9 quality detection adjacent channel msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 -------0/1not valid - - - - - - 0 - ac highpass frequency 100 khz - - - - - - 1 - ac bandpass frequency 100 khz - - - - - 0 - - ac gain 32 db - - - - - 1 - - ac gain 38 db - - 0 0 0 - - - ac wide band threshold 0.25 v - - 0 0 1 - - - ac wide band threshold 0.35 v - - 0 1 0 - - - ac wide band threshold 0.45 v --------- - - 1 1 1 - - - ac wide band threshold 0.95 v 0 0 - - - - - - ac narrow band threshold 0.0 v 0 1 - - - - - - ac narrow band threshold 0.1 v 1 0 - - - - - - ac narrow band threshold 0.2 v 1 1 - - - - - - ac narrow band threshold 0.3 v table 18. addr 10 quality detection multipath msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 -------0multipath control ?on? -------1multipath control ?off? ------0-mp bandpass freq uency 19 khz ------1-mp bandpass freq uency 31 khz -----0--mp gain 12 db -----1--mp gain 23 db - - - 0 0 - - - mp threshold 0.50 v
software specification TDA7512F 32/45 doc id 12668 rev 2 - - - 0 1 - - - mp threshold 0.75 v - - - 1 0 - - - mp threshold 1.00 v - - - 1 1 - - - mp threshold 1.25 v -00-----application mode 1 -01-----application mode 2 0-------multipath eliminates ac 1-------multipath eliminates ac and ac+ table 18. addr 10 quality detection multipath (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 19. addr 11 quality deviation detection msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - ----000charge current 34 a , discharge current 6 a - ----001charge current 32 a , discharge current 8 a - ----010charge current 30 a , discharge current 10 a - ----011charge current 28 a , discharge current 12 a - -------- - ----111charge current 20 a , discharge current 20 a - - - 0 0 - - - dev threshold for iss narrow/wide 30 khz - - - 0 1 - - - dev threshold for iss narrow/wide 45 khz - - - 1 0 - - - dev threshold for iss narrow/wide 60 khz - - - 1 1 - - - dev threshold for iss narrow/wide 75 khz - 00-----dev threshold for iss filter ?off? ratio 1.5 - 01-----dev threshold for iss filter ?off? ratio 1.4 - 10-----dev threshold for iss filter ?off? ratio 1.3 - 11-----dev threshold for iss filter ?off? ratio 1 0 ------- disable iss filter to fixed bandwith (iss80) in automatic control 1 ------- enable iss filter to fixed bandwith (iss80) in automatic control table 20. addr 12 soft mute control 1 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - - - - 0 0 0 startpoint mute 0 in application about 3dbv antenna level - - - - - 0 0 1 startpoint mute 1in applic ation about 4dbv antenna level
TDA7512F software specification doc id 12668 rev 2 33/45 --------- - - - - - 1 1 1 startpoint mute 7in application about 10db v antenna level - 0 0 0 0 - - - mute depth 0 in application 18d b - 0 0 0 1 - - - mute depth 1 in application 20 db - 0 0 1 0 - - - mute depth 2 in application 22 db - 0 0 1 1 - - - mute depth 3 in application 24 db - - - - - - - - - (logarithmically behaviour) - 1 1 1 1 - - - mute depth 15 in application 36 db 0 - - - - - - - mute disable 1 - - - - - - - mute enable table 20. addr 12 soft mute control 1 (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 21. addr 13 soft mute control 2 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 -------0disable mute threshold for iss filter ?on? -------1enable mute threshold for iss filter ?on? - - - - - 0 0 - ac mute depth 10 db - - - - - 0 1 - ac mute depth 8 db - - - - - 1 0 - ac mute depth 6 db - - - - - 1 1 - ac mute depth 4 db - 0000 - - -ac mute threshold 60 mv - 0001 - - -ac mute threshold 80 mv - 0010 - - -ac mute threshold 100 mv --------- - 0111 - - -ac mute threshold 340 mv - 1111 - - -ac mute ?off? 0-------ac mute filter 110 khz 1-------ac mute filter 100 khz table 22. addr 14 vcodiv/pllref msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - - - - - 0 0 not valid (only for testing) - - - - - - 0 1 vco frequency divided by 2
software specification TDA7512F 34/45 doc id 12668 rev 2 - - - - - 1 0 vco frequency divided by 3 - - - - - 1 1 original vco frequency -----0--vco? i? signal 0 c - - - - - 1 - - vco ?i? signal 180 c - - 1 0 0 - - - pll reference frequency 50 khz - - 1 0 1 - - - pll reference frequency 25 khz - - 1 1 0 - - - pll reference frequency 10 khz - - 1 1 1 - - - pll reference frequency 9 khz - - 0 0 0 - - - pll reference frequency 2 khz 0 0 - - - - - - has to be set table 22. addr 14 vcodiv/pllref (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 23. addr 15 fm agc msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ------00rfagc threshold v 7-9th = 85 (77 ant) dbv ------01rfagc threshold v 7-9th = 90 (82 ant) dbv ------10rfagc threshold v 7-9th = 94 (86 ant) dbv ------11rfagc threshold v 7-9th = 96 (88 ant) dbv - - - - 0 0 - - ifagc threshold v 60th = 86 (60 ant) dbv - - - - 0 1 - - ifagc threshold v 60th = 92 (66 ant) dbv - - - - 1 0 - - ifagc threshold v 60th = 96 (70 ant) dbv - - - - 1 1 - - ifagc threshold v 60th = 98 (72 ant) dbv - 0 0 0 - - - - kagc threshold 80 dbv - 0 0 1 - - - - kagc threshold 82 dbv - 0 1 0 - - - - kagc threshold 84 dbv - 0 1 1 - - - - kagc threshold 86 dbv - 1 0 0 - - - - kagc threshold 88 dbv - 1 0 1 - - - - kagc threshold 90 dbv - 1 1 0 - - - - kagc threshold 92 dbv - 111 - - - -keying agc ?off? 0-------has to be ?0?
TDA7512F software specification doc id 12668 rev 2 35/45 table 24. addr 16 not valid msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 11111111has to be set table 25. addr 17 fm demodulator fine adjust msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - 0000000 mv - - 000001+8.5 mv - - 000010+17 mv --------- - - 011111+263.5 mv - - 1000000 mv - - 100001-8.5 mv - - 100010-17 mv --------- - - 111111-263.5 mv 00------spike cancelation ?off? 01------threshold for spike cancelation 270 mv 10------threshold for spike cancelation 520 mv 11------threshold for spike cancelation 750 mv table 26. addr 18 s-meter slider msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - - - 0 0 0 0 s meter slider offset sl=0db - - - - 0 0 0 1 s meter offset sl=1db - - - - 0 0 1 0 s meter offset sl=2db --------- - - - - 1 1 1 1 s meter offset sl=15db ---0----s meter offset -sl ---1----s meter offset +sl --0-----s meter slope 1 v/decade --1-----s meter slope 1.5 v/decade -1------has to be set
software specification TDA7512F 36/45 doc id 12668 rev 2 0-------overdeviation correction ?on? 1-------overdeviation correction ?off? table 26. addr 18 s-meter slider (continued) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 table 27. addr 19 if gain/xtal adjust msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 -------0if1 gain2 9d b - - - - - - - 1 if1 gain2 11 db - - - - - 0 0 - if1 gain1 9 db - - - - - 0 1 - if1 gain1 11 db - - - - - 1 0 - if1 gain1 12 db - - - - - 1 1 - if1 gain1 15 db 00000 - - -c load 0 pf 00001 - - -c load 0.75 pf 00010 - - -c load 1.5 pf 00011 - - -c load 2.25 pf 00100 - - -c load 3 pf --------- 11111 - - -c load 23.25 pf table 28. addr 20 tank adjust msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - - - - 0 0 0 0 has to be set 0 0 0 0 - - - - 10.7 mhz 0 pf 0 0 0 1 - - - - 10.7 mhz 0.55 pf 0 0 1 0 - - - - 10.7 mhz 1.1 pf 0 0 1 1 - - - - 10.7 mhz 1.65 pf --------- 1 1 1 1 - - - - 10.7 hz 8.25 pf
TDA7512F software specification doc id 12668 rev 2 37/45 table 29. addr 21 i/q mixer 1 adjust msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----0000-7 c ----0001-6 c ----0010-5 c --------- ----01110 c ----1000+1 c ----1001+2 c --------- ----1111+8 c --00----0 % --01-----1 % --10----+1 % --11----0 % -x------not used 0 - - - - - - - overdeviation correction current max = 45 a 1 - - - - - - - overdeviation correction current max = 90 a table 30. addr 22 test control 1 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 xxxxxxxxonly for testing ( have to be set to 0) table 31. addr 23 test control 2 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 xxxxxxxxonly for testing ( have to be set to 0) table 32. addr 24 test control 3 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 xxxxxxxxonly for testing ( have to be set to 0) table 33. addr 25 test control 4 msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 x x x x x x x x only for testing ( have to be set to 0)
package information TDA7512F 38/45 doc id 12668 rev 2 6 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 4. lqfp64 mechanical data and package dimensions outline and mechanical data a a2 a1 b c 16 17 32 33 48 49 64 e3 d3 e1 e d1 d e 1 k b l l1 seating plane 0.08mm dim. mm inch min. typ. max. min. typ. max. a 1.60 0.063 a1 0.05 0.15 0.002 0.006 a2 1.35 1.40 1.45 0.053 0.055 0.057 b 0.17 0.22 0.27 0.0066 0.0086 0.0106 c 0.09 0.0035 d 11.80 12.00 12.20 0.464 0.472 0.480 d1 9.80 10.00 10.20 0.386 0.394 0.401 d3 7.50 0.295 e 0.50 0.0197 e 11.80 12.00 12.20 0.464 0.472 0.480 e1 9.80 10.00 10.20 0.386 0.394 0.401 e3 7.50 0.295 l 0.45 0.60 0.75 0.0177 0.0236 0.0295 l1 1.00 0.0393 k 0? (min.), 3.5? (typ.), 7? (max.) ccc 0.080 0.0031 lqfp64 (10 x 10 x 1.4mm) 0051434 f ccc
TDA7512F block diagrams doc id 12668 rev 2 39/45 appendix a block diagrams figure 5. block diagram i/q mixer figure 6. block diagram vco
block diagrams TDA7512F 40/45 doc id 12668 rev 2 figure 7. block diagram keying agc figure 8. block diagram iss function
TDA7512F block diagrams doc id 12668 rev 2 41/45 table 34. block diagram quality detection principle (without overdeviation correction) signal low high ac no adjacent channel adjacent channel present ac+ no strong adjacent channel adjacent channel higher as ac sm fieldstrength higher as softmute threshold fieldstrength lower as softmute threshold dev deviation lower as threshold dwth deviation higher as threshold dwth dev+ deviation lower as threshold dth*dwth deviation higher as threshold dth*dwth inton iss filter off by logic (wide) iss filter on by logic int80 iss filter 120khz (mid) iss filter 80khz (narrow) table 35. input signals modes input signals mode 1 mode 2 0ac 0ac+ 0sm 0dev 0dev+ 0inton 0int80 0 function 0inton 0int80 0function 000000 0 wide00wide 000100 0 wide00wide 000110 0 wide00wide 001001 1narrow11narrow 001100 0 wide10mid 001110 0 wide00wide 100001 1narrow10mid 110001 1narrow11narrow 100101 0 mid 10mid 110111 0 mid 11narrow 101001 1narrow11narrow 111001 1narrow11narrow 101101 0 mid 10mid 111101 0 mid 11narrow 101111 0 mid 10mid 111111 0 mid 11narrow
block diagrams TDA7512F 42/45 doc id 12668 rev 2 figure 9. application circuit table 36. part list (application- and measurment circuit) item description f1 toko 5km 396ins-a542ek f2 toko mc152 e558cn-100021 f3 toko 7psg 826rc-5134n l1 toko lqh31 l2 toko ll 2012-680 cf1 toko cfsk107m3-ae-20x cf2 toko cfsk107m4-ae-20x d1,d2 toko kp2311e d3 toko kv1370nt d4 philips bb156
TDA7512F application notes doc id 12668 rev 2 43/45 appendix b application notes following items are important to get highest performance of TDA7512F in application: 1. in order to avoid leakage current from pll loop filter input to ground a guardring is recommended around loop filter pin?s with pll reference voltage potential. 2. distance between xtal and vco input pin 18 should be far as possible and xtal package should get a shield versus ground. 3. blocking of vco supply should be near at pin 16 and pin 17. 4. wire lenght to fm mixer1 input and output should be symetrically and short. 5. fm demodulator capacitance at pin 44 should be sense connected as short as possible versus demodulator ground at pin 47. 6. with respect to thd capacitive coupling from pin 20 to vco should be avoided. capacitance at pin 20 has be connected versus vcc2 ground.
revision history TDA7512F 44/45 doc id 12668 rev 2 7 revision history table 37. document revision history date revision changes 05-sep-2006 1 initial release. 24-jun-2009 2 updated section 6: package information on page 38 .
TDA7512F doc id 12668 rev 2 45/45 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2009 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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