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august 2009 doc id 11015 rev 6 1/25 25 ts472 very low noise microp hone preamplifier with 2.0 v bias output and active low standby mode features low noise: 10 nv/ hz typ. equivalent input noise at f = 1 khz fully-differential input/output 2.2 to 5.5 v single supply operation low power consumption at 20 db: 1.8 ma fast start up time at 0 db: 5 ms typ. low distortion: 0.1% typ. 40 khz bandwidth regardless of the gain active low standby mode function (1 a max) low noise 2.0 v microphone bias output available in flip-chip lead-free package and in qfn24 4 x 4 mm package esd protection (2 kv) applications video and photo cameras with sound input sound acquisition and voice recognition video conference systems notebook computers and pdas description the ts472 is a differential-input microphone preamplifier optimized for high-performance pda and notebook audio systems. this device features an adjustable gain from 0 to 40 db with excellent power-supply and common- mode rejection ratios. in addition, the ts472 has a very low noise microphone bias generator of 2v. it also includes a complete shutdown function, with active low standby mode. flip-chip - 12 bumps pin connections (top view) qfn24 pin connections (top view) 1 2 3 4 5 6 7 13 14 15 16 17 18 19 20 21 22 23 24 nc byp nc nc nc nc nc nc nc nc nc gnd in- 8 9 10 11 12 nc in+ gs bias c1 c2 out- out+ gnd stby vcc www.st.com
contents ts472 2/25 doc id 11015 rev 6 contents 1 typical application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.2 higher cut-off frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3 lower cut-off frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.4 low-noise microphone bias source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.5 gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.6 wake-up time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.7 standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.8 layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.9 single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.10 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.1 flip-chip package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.2 qfn24 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ts472 typical application schematic doc id 11015 rev 6 3/25 1 typical application schematic figure 1 shows a typical application schematic for the ts472. figure 1. application schematic (flip-chip) table 1. description of external components components functional description c in+ , c in- input coupling capacitors that block the dc voltage at the amplifier input terminal. c out+ , c out- output coupling capacitors that bl ock the dc voltage coming from the amplifier output terminal (pins c2 and d2) and determine the lower cut-off frequency (see section 4.3: lower cut-off frequency ). r out+ , r out- output load resistors used to charge the output coupling capacitors c out . these output resistors can be repres ented by an input impedance of a following stage. r pos , r neg polarizing resistors for biasing of a microphone. c s supply bypass capacitor that provides power supply filtering. c b bypass pin capacitor that provides half-supply filtering. c 1 , c 2 low pass filter capacitors allowing to cut the high frequency. c 3 bias output filtering capacitor. vcc electret mic rpos rneg standby control positive output negative output 1uf cb 1uf cs 1uf c3 c1 c2 cin+ cin- + cout+ cout- rout+ rout- bias stdby in- in+ g c1 c2 out+ out- gain bypass bias gnd vcc select 2.0v u1 ts472_fc optional
typical application schematic ts472 4/25 doc id 11015 rev 6 table 2. pin descriptions pin name flip-chip designator qfn designator pin description in+ a1 8 positive differential input in- b1 5 negative differential input bias a2 10 2 v bias output gnd c1 4, 22 ground stby c3 21 standby byp d1 2 bypass gs b2 9 gain select out- d2 16 negative differential output out+ c2 17 positive differential output c1 a3 14 low-pass filter capacitor c2 b3 15 low-pass filter capacitor vcc d3 20 power supply nc --- 3, 6, 7, 11, 12, 13, 18, 19, 23, 24 not connected, floating pins
ts472 absolute maximum ratings doc id 11015 rev 6 5/25 2 absolute maximum ratings table 3. absolute maximum ratings symbol parameter value unit v cc supply voltage (1) 1. all voltage values are measur ed with respect to the ground pin. 6v v i input voltage -0.3 to v cc +0.3 v t oper operating free air temperature range -40 to + 85 c t stg storage temperature -65 to +150 c t j maximum junction temperature 150 c r thja thermal resistance junction to ambient: flip-chip qfn24 180 110 c/w esd human body model 2 kv esd machine model 200 v lead temperature (soldering, 10sec) 250 c table 4. operating conditions symbol parameter value unit v cc supply voltage 2.2 to 5.5 v a typical differential gain (gs connected to 4.7 k or bias ) 20 db v stby standby voltage input: device on device off 1.5 v stby v cc gnd v stby 0.4 v t op operational free air temperature range -40 to +85 c r thja thermal resistance junction to ambient: flip-chip qfn24 150 60 c/w
electrical characteristics ts472 6/25 doc id 11015 rev 6 3 electrical characteristics table 5. electrical characteristics at v cc = 3 v with gnd = 0 v, t amb = 25 c (unless otherwise specified) symbol parameter min. typ. max. unit e n equivalent input noise voltage density r eq =100 at 1 khz 10 thd+n total harmonic distortion + noise 20 hz f 20 khz, gain = 20 db, v in =50mv rms 0.1 % v in input voltage, gain = 20 db 10 70 mv rms b w bandwidth at -3 db bandwidth at -1 db pin a3, b3 floating 40 20 khz g overall output voltage gain (rgs variable): minimum gain, rgs infinite maximum gain, rgs = 0 -3 39.5 -1.5 41 0 42.5 db z in input impedance referred to gnd 80 100 120 k r load resistive load 10 k c load capacitive load 100 pf i cc supply current, gain = 20 db 1.8 2.4 ma i stby standby current 1 a psrr power supply rejection ratio, gain = 20 db, f = 217 hz, v ripple = 200 mvpp, inputs grounded differential output single-ended outputs, -70 -46 db table 6. bias output: v cc = 3 v, gnd = 0 v, t amb = 25 c (unless otherwise specified) symbol parameter min. typ. max. unit v out no load condition 1.9 2 2.1 v r out output resistance 80 100 120 w i out output bias current 2 ma psrr power supply rejection ratio, f = 217 hz, v ripple = 200 mvpp 70 80 db nv hz ----------- -
ts472 electrical characteristics doc id 11015 rev 6 7/25 table 7. differential rms noise voltage gain (db) input referred noise voltage ( v rms ) output noise voltage ( v rms ) unweighted filter a-weighted filter unweighted filter a-weighted filter 015 10 15 10 20 3.4 2.3 34 23 40 1.4 0.9 141 91 table 8. bias output rms noise voltage c 3 (1) ( f) 1. bias output filtering capacitor. unweighted filter ( v rms ) a-weighted filter ( v rms ) 154.4 10 2.2 1.2 table 9. snr (signal to noise ratio), thd+n < 0.5% gain (db) unweighted filter 20 hz - 20 khz (db) a-weighted filter (db) v cc =2.2v v cc =3v v cc =5.5v v cc =2.2v v cc =3v v cc =5.5v 0 75 76 76798080 20 82 83 83 89 90 90 40 70 72 74 80 82 84
electrical characteristics ts472 8/25 doc id 11015 rev 6 figure 2. current consumption vs. power supply voltage figure 3. current consumption vs. power supply voltage 0123456 0.0 0.5 1.0 1.5 2.0 2.5 3.0 tamb=85c tamb=25c tamb=-40c no loads gs floating current consumption (ma) power supply voltage (v) 0123456 0.0 0.5 1.0 1.5 2.0 2.5 3.0 tamb=85c tamb=25c tamb=-40c no loads gs grounded current consumption (ma) power supply voltage (v) figure 4. current consumption vs. standby voltage figure 5. current consumption vs. standby voltage 012345 0.0 0.5 1.0 1.5 2.0 2.5 vcc=5v vcc=3v no loads gs floating tamb = 25c current consumption (ma) standby voltage (v) 012345 0.0 0.5 1.0 1.5 2.0 2.5 vcc=5v vcc=3v no loads gs grounded tamb = 25c current consumption (ma) standby voltage (v) figure 6. standby threshold voltage vs. power supply voltage figure 7. frequency response 345 0.0 0.2 0.4 0.6 0.8 1.0 no loads tamb = 25c standby treshold voltage (v) power supply voltage (v) 2.2 5.5 10 100 1000 10000 100000 -20 -10 0 10 20 30 c1,c2=220pf c1,c2=100pf cin,cout=10nf cin,cout=100nf no c1,c2 cb=1 f, t amb =25 c, gain=20db, rout=100k psrr (db) frequency (hz)
ts472 electrical characteristics doc id 11015 rev 6 9/25 figure 8. bias output voltage vs. bias output current figure 9. bias output voltage vs. power supply voltage 01234 1.4 1.6 1.8 2.0 2.2 tamb=85c tamb=25c bias output voltage (v) bias output current (ma) tamb=-40c vcc=2.5-6v 345 1.4 1.6 1.8 2.0 2.2 ibias=4ma ibias=2ma tamb=25c ibias=0ma bias output voltage (v) power supply voltage (v) 2.2 5.5 figure 10. bias psrr vs. frequency figure 11. bias psrr vs. frequency 100 1000 10000 -100 -80 -60 -40 -20 0 vripple=200mvpp vcc=3v cb=1 f tamb =25 c psrr (db) frequency (hz) 50 20k bias floating or 1k to gnd 100 1000 10000 -100 -80 -60 -40 -20 0 bias = 1k to gnd vripple=200mvpp vcc=5v cb=1 f tamb=25 c psrr (db) frequency (hz) 50 20k bias floating figure 12. differential output psrr vs. frequency figure 13. differential output psrr vs. frequency 100 1000 10000 -80 -70 -60 -50 -40 -30 -20 -10 0 gs=bias gs grounded vripple=200mvpp inputs grounded vcc=3v cb=1 f cin=100nf tamb=25 c gs floating psrr (db) frequency (hz) 50 20k 100 1000 10000 -80 -70 -60 -50 -40 -30 -20 -10 0 gs=bias gs grounded vripple=200mvpp inputs grounded vcc=5v cb=1 f cin=100nf tamb=25 c gs floating psrr (db) frequency (hz) 50 20k
electrical characteristics ts472 10/25 doc id 11015 rev 6 figure 14. differential output psrr vs. frequency figure 15. differential output psrr vs. frequency 100 1k 10k -100 -80 -60 -40 -20 0 v ripple =200mv pp , inputs grounded v cc =3v, minimum gain, cin=1 f, t amb =25 c cb=1 f no cb cb=100nf psrr (db) frequency (hz) 50 20k 100 1k 10k -100 -80 -60 -40 -20 0 v ripple =200mv pp , inputs grounded v cc =3v, gain=20db, cin=1 f, t amb =25 c cb=1 f no cb cb=100nf psrr (db) frequency (hz) 50 20k figure 16. single-ended output psrr vs. frequency figure 17. equivalent input noise voltage density 100 1000 10000 -80 -70 -60 -50 -40 -30 -20 -10 0 vcc=5v vcc=2.2v vcc=3v vripple=200mvpp inputs grounded cb=1 f cin=100nf tamb=25 c psrr (db) frequency (hz) 50 20k 10 100 1k 10k 100k 1 10 100 1000 cin=100nf r eq =100 t amb =25 c e n ( nv/ hz ) frequency (hz) figure 18. gain vs. power supply voltage figure 19. gain vs. ambient temperature 345 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 maximum gain gain=20db f=1khz vin=5mv tamb=25c minimum gain gain (db) power supply voltage (v) 2.2 5.5 -40-20 0 20406080 -1.00 -0.75 -0.50 -0.25 0.00 0.25 0.50 maximum gain f=1khz v in =5mv gain=20db minimum gain gain (db) ambient temperature (c)
ts472 electrical characteristics doc id 11015 rev 6 11/25 figure 20. maximum input voltage vs. gain, thd+n<1% figure 21. maximum input voltage vs. power supply voltage, thd+n<1% 0 10203040 0 50 100 150 v cc =2.2v t amb =25c f=1khz thd+n<1% maximum input voltage ( mv rms ) gain (db) v cc =5.5v v cc =3v 345 0 20 40 60 80 100 120 140 gain=20db gain=0db t amb =25c, f=1khz, thd+n<1% maximum input voltage ( mv rms ) power supply voltage (v) gain=30db gain=40db 2.2 5.5 figure 22. thd+n vs. input voltage f igure 23. thd+n vs. input voltage 1e-3 0.01 0.1 0.01 0.1 1 10 gs=bias gs grounded tamb=25c, vcc=3v, f=100hz, cb=1 f, rl=10k , bw=100hz-120khz thd+n (%) input voltage (v) 0.3 gs floating 1e-3 0.01 0.1 0.01 0.1 1 10 gs grounded gs floating gs=bias tamb=25c, vcc=5v, f=100hz, cb=1 f, rl=10k , bw=100hz-120khz thd+n (%) input voltage (v) 0.3 figure 24. thd+n vs. input voltage f igure 25. thd+n vs. input voltage 1e-3 0.01 0.1 0.01 0.1 1 10 gs grounded gs=bias tamb=25c, vcc=3v, f=1khz, cb=1 f, rl=10k , bw=100hz-120khz thd+n (%) input voltage (v) 0.3 gs floating 1e-3 0.01 0.1 0.01 0.1 1 10 gs grounded gs=bias gs floating tamb=25c, vcc=5v, f=1khz, cb=1 f, rl=10k , bw=100hz-120khz thd+n (%) input voltage (v) 0.3
electrical characteristics ts472 12/25 doc id 11015 rev 6 figure 26. thd+n vs. input voltage f igure 27. thd+n vs. input voltage 1e-3 0.01 0.1 0.01 0.1 1 10 gs grounded gs=bias tamb=25c, vcc=3v, f=20khz, cb=1 f, rl=10k , bw=100hz-120khz thd+n (%) input voltage (v) 0.3 gs floating 1e-3 0.01 0.1 0.01 0.1 1 10 gs floating gs=bias gs grounded tamb=25c, vcc=5v, f=20khz, cb=1 f, rl=10k , bw=100hz-120khz thd+n (%) input voltage (v) 0.3 figure 28. thd+n vs. frequency figure 29. thd+n vs. frequency 100 1000 10000 0.1 1 10 gs=bias, vin=100mv gs floating, vin=100mv gs grounded, vin=20mv tamb=25c vcc=3v rl=10k cb=1 f bw=100hz-120khz 20k 50 thd + n (%) frequency (hz) 100 1000 10000 0.1 1 10 gs=bias, vin=100mv gs floating, vin=100mv gs grounded, vin=20mv tamb=25 c vcc=5v rl=10k cb=1 f bw=100hz-120khz 20k 50 thd + n (%) frequency (hz) figure 30. transient response figure 31. common mode rejection ratio (cmrr) vs frequency 100 1k 10k -100 -80 -60 -40 -20 0 vicm=200mvpp, v cc =3v c in =1 f, t amb =25c gain=20db maximum gain minimum gain cmrr (db) frequency (hz) 20 20k
ts472 application information doc id 11015 rev 6 13/25 4 application information 4.1 differential configuration principle the ts472 is a fully-differential input/output microphone preamplifier. the ts472 also includes a common-mode feedback loop that controls the output bias value to average it at v cc /2. this allows the device to always have a maximum output voltage swing, and by consequence, maximize the input dynamic voltage range. the advantages of a fully-differential amplifier are: very high psrr (power supply rejection ratio). high common mode noise rejection. in theory, the filtering of the internal bias by an external bypass capacitor is not necessary. however, to reach maximum performance in all tolerance situations, it is better to keep this option. 4.2 higher cut-off frequency the higher cut-off frequency f ch of the microphone preamplifier depends on the external capacitors c 1 , c 2 . ts472 has an internal first order low-pass filter (r = 40 k , c = 100 pf) to limit the highest cut-off frequency on 40 khz (with a 3 db attenuation). by connecting c 1 , c 2 you can decrease f ch by applying the following formula. figure 32 represents the higher cut-off frequency in hz versus the value of the output capacitors c 1 , c 2 in nf. figure 32. higher cut-off frequency vs. output capacitors for example, f ch is almost 20 khz with c 1,2 =100 pf. f ch 1 2 40 3 10 c 12 , 100 12 ? 10 + () ?? --------------------------------------------------------------------------------------------- - = 200 400 600 800 1000 1 10 higher cut-off frequency (khz) c1, c2 (pf) 40
application information ts472 14/25 doc id 11015 rev 6 4.3 lower cut-off frequency the lower cut-off frequency f cl of the microphone preamplifier depends on the input capacitors c in and output capacitors c out . these input and output capacitors are mandatory in an application because of dc voltage blocking. the input capacitors c in in series with the input impedance of the ts472 (100 k ) are equivalent to a first order high-pass filter. assuming that f cl is the lowest frequency to be amplified (with a 3 db attenuation), the minimum value of c in is: the capacitors c out in series with the output resistors r out (or an input impedance of the next stage) are also equivalent to a first order high-pass filter. assuming that f cl is the lowest frequency to be amplified (with a 3 db attenuation), the minimum value of c out is: figure 33 and figure 34 give directly the lower cut-off frequency (with 3 db attenuation) versus the value of the input or output capacitors. note: if f cl is kept the same for calculation purposes, take into account that the 1st order high- pass filter on the input and the 1st order high-pass filter on the output create a 2nd order high-pass filter in the audio signal path with an attenuation of 6 db on f cl and a roll-off of 40 db/decade. 4.4 low-noise microphone bias source the ts472 provides a very low noise voltage and power supply rejection bias source designed for biasing an electret condenser microphone cartridge. the bias output is typically set at 2.0 v dc (no load conditions), and can typically source 2 ma with respect to drop-out, determined by the internal 100 resistance (for detailed load regulation curves see figure 8 ). c in 1 2 f cl 100 3 10 ?? ------------------------------------------------------ = c out 1 2 f cl r out ?? ------------------------------------------ - = figure 33. lower cut-off frequency vs. input capacitors figure 34. lower cut-off frequency vs. output capacitors 1 10 100 10 100 1000 typical zin zinmax lower cut-off frequency (hz) cin (nf) zinmin 1 10 100 1000 10 100 1000 rout=10k lower cut-off frequency (hz) cout (nf) rout=100k
ts472 application information doc id 11015 rev 6 15/25 4.5 gain settings the gain in the application depends mainly on: the sensitivity of the microphone, the distance to the microphone, the audio level of the sound, the desired output level. the sensitivity of the microphone is generally expressed in db/pa, referenced to 1 v/pa. for example, the microphone used in testing had an output voltage of 6.3 mv for a sound pressure of 1 pa (where pa is the pressure unit, pascal). expressed in db, the sensitivity is: 20log(0.0063) = -44 db/pa to facilitate the first approach, ta b l e 1 0 gives voltages and gains used with a low-cost omni- directional electret condenser microphone of -44 db/pa. the gain of the ts472 microphone preamplifier can be set as follows. 1. from -1.5 db to 41 db by connecting an external grounded resistor r gs to the gs pin. this enables the gain to be adapted more precisely to each application. 2. to 20 db by applying v gs > 1v dc on the gain select (gs) pin. this setting can help to reduce a number of external components in an application, because 2.0 v dc is provided by the ts472 itself on the bias pin. table 10. typical ts472 gain vs. distance to the microphone (sensitivity -44 db/pa) distance to microphone micropho ne output voltage ts472 gain 1cm 30mv rms 20 20 cm 3 mv rms 100 table 11. selected gain vs. gain select resistor gain (db) 010203040 r gs ( ) 470k 27k 4k7 1k 68 figure 35. gain in db vs. gain select resistor figure 36. gain in v/v vs. gain select resistor 10 100 1k 10k 100k 1m -10 0 10 20 30 40 50 tamb=25 c gain (db) r gs ( ) 10 100 1k 10k 100k 1m 1 10 100 gain (v/v) tamb=25 c r gs ( )
application information ts472 16/25 doc id 11015 rev 6 figure 37 gives other values of the gain vs. voltage applied on the gs pin. figure 37. gain vs. gain select voltage note: in the case of a single-ended output configuration (either positive or negative output is used for the following signal processing) the overall gain is half. one must also take into account that all advantages of the differential configurat ion principles are lost (see the difference in psrr in ta bl e 5 ). 4.6 wake-up time when the standby mode is released to switch the device to on, a signal appears on the output a few microseconds later, and the bypass capacitor c b is charged within a few milliseconds. as c b is directly linked to the bias of the amplifier, the bias will not work properly until the c b voltage is correct. in a typical application, when a biased microphon e is connected to the differential input via the input capacitors (c in ), (and the output signal is in line with the specification), the wake-up time will depend upon t he values of the in put capacitors c in and the gain. when the gain is lower than 0 db, the wake-up time is determined only by the bypass capacitor c b , as described above. for a gain superior to 0 db, refer to figure 38 . figure 38. wake-up time in a typica l application vs. input capacitors 0 0.2 0.4 0.6 0.8 4 5 -80 -60 -40 -20 0 20 40 tamb=25 c gain (db) v gs ( v ) 20 40 60 80 100 0 10 20 30 40 50 60 gain=20db tamb = 25c vcc=3v cb=1 f wake-up time (ms) input capacitors c in (nf) maximum gain
ts472 application information doc id 11015 rev 6 17/25 4.7 standby mode when the standby command is set, it takes a few microseconds to set the output stages (differential outputs and 2.0 v bias output) to high impedance and the internal circuitry to shutdown mode . 4.8 layout considerations the ts472 has sensitive pins to connect c1, c2 and rgs. to obtain high power supply rejection and low noise performance, it is mandatory that the layout track to these components be as short as possible. decoupling capacitors on v cc and bypass pin are needed to eliminate power supply drops. in addition, the capacitor location for the dedica ted pin should be as close to the device as possible. 4.9 single-ended input configuration it is possible to use the ts472 in a single-ended input configuration. the schematic in figure 39 provides an example of this type of configuration. figure 39. typical single-ended input application vcc electret mic rpos standby control positive output negative output 1uf cb 1uf cs 1uf c3 c1 c2 cin+ cin- + cout+ cout- rout+ rout- bias stdby in- in+ g c1 c2 out+ out- gain bypass bias gnd vcc select d3 a3 b3 c2 d2 b2 d1 c3 c1 a2 b1 a1 2.0v u1 ts472 optional
application information ts472 18/25 doc id 11015 rev 6 4.10 demonstration board a demonstration board for the ts472 is available. for more information about this demonstration board, refer to application note an 2240 on www.st.com. figure 40. pcb top layer figure 41. pcb bottom layer figure 42. component location
ts472 package information doc id 11015 rev 6 19/25 5 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. 5.1 flip-chip package information figure 43. ts472 footprint recommendation figure 44. pinout (top view) pad in cu 18 m with flash niau (2-6 m, 0.2 m max.) 150 m min. 500 m 500 m 500 m 500 m =250 m =400 m typ. 75m min. 100 m max. track non solder mask opening =340 m min. pad in cu 18 m with flash niau (2-6 m, 0.2 m max.) 150 m min. 500 m 500 m 500 m 500 m =250 m =400 m typ. 75m min. 100 m max. track non solder mask opening =340 m min. a c b 1 2 3 d in+ in- gnd out+ c2 c1 output bias gs vcc out- stdby bypass a c b 1 2 3 d in+ in- gnd out+ c2 c1 output bias gs vcc out- stdby stdby bypass balls are underneath
package information ts472 20/25 doc id 11015 rev 6 figure 45. marking (top view) figure 46. flip-chip - 12 bumps figure 47. tape & reel specification (top view) 472 yww e 472 yww e st logo part number: 472 e lead free bumps three digits datecode: yww the dot indicates pin a1 die size: 2.1 mm x 1.6 mm 30 m die height (including bumps): 600 m bumps diameter: 315 m 50 m bump diameter before reflow: 300 m 10 m bump height: 250 m 40 m die height: 350 m 20 m pitch: 500 m 50 m coplanarity: 50 m max 2.1 mm 1.6 mm 0.5mm 0.5mm ? 0.315mm 2.1 mm 1.6 mm 0.5mm 0.5mm ? 0.315mm 600m 600m user direction of feed 8 die size x + 70m die size y + 70m 4 1.5 4 all dimensions are in mm a 1 a 1 user direction of feed 8 die size x + 70m die size y + 70m 4 1.5 4 all dimensions are in mm a 1 a 1
ts472 package information doc id 11015 rev 6 21/25 5.2 qfn24 package information figure 48. qfn24 package mechanical drawing a seating plane 0 a1 0.50 dia. d1 d e1 e nd 2 3 1 ne 3 2 b 1 e l p q r e2 d2 a2
package information ts472 22/25 doc id 11015 rev 6 table 12. qfn24 package mechanical data ref. dimensions millimeters inches min. typ. max. min. typ. max. a 0.80 1.00 0.031 0.040 a1 0.05 0.002 a2 0.65 0.80 0.026 0.031 d 4.00 0.158 d1 3.75 0.148 e 4.00 0.158 e1 3.75 0.148 p 0.24 0.42 0.60 0.009 0.017 0.024 r 0.13 0.17 0.23 0.005 0.007 0.009 e 0.50 0.020 n 24.00 0.945 nd 6.00 0.236 ne 6.00 0.236 l 0.30 0.40 0.50 0.012 0.016 0.020 b 0.18 0.30 0.007 0.012 q 0.20 0.45 0.008 0.018 d2 1.95 2.10 2.25 0.077 0.083 0.089 e2 1.95 2.10 2.25 0.077 0.083 0.089 ? 12
ts472 ordering information doc id 11015 rev 6 23/25 6 ordering information table 13. order codes order code temperature range package packing marking ts472eijt -40c, +85c flip-chip tape & reel 472 TS472IQT -40c, +85c qfn24 4x4mm tape & reel k472
revision history ts472 24/25 doc id 11015 rev 6 7 revision history table 14. document revision history date revision changes 01-jul-05 1 initial release corresponding to product preview version. 01-oct-05 2 first release of fully mature product datasheet. 01-dec-05 3 added single-ended input operation in section 4: application information . 12-sep-2006 4 added qfn package information. updated curves, added new ones in section 3: electrical characteristics . 02-mar-2009 5 corrected error on c1 and c2 caps. added table 2: pin descriptions . updated qfn24 package information in section 5.2 . 25-aug-2009 6 corrected qfn package pinout on cover page.
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