1 multimedia ics sync separator ic with afc BA7062F the BA7062F separates the synchronization signals from a video signal and outputs the horizontal and vertical syn- chronization signals (h d and v d ), and the composite synchronization signal (sync-out). the h d and v d pulse widths are different. applications tvs and vcrs features 1) built-in afc circuit. 2) low power dissipation (approx. 21mw). 3) low external parts count. 4) sop 8-pin package. 5) horizontal free-run frequency does not require adjust- ment. 1 2 3 4 8 7 6 5 phase comp h.osc sync sepa v.sepa block diagram absolute maximum ratings (ta = 25?) parameter symbol limits unit 8.0 v 350 * mw c c v cc max. pd topr tstg 20 ~ + 75 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature * when mounted on a 50mm 50mm pcb, reduced by 3.5mw for each increase in ta of 1 c over 25 c. recommended operating conditions (ta = 25?) parameter symbol min. typ. max. unit v cc 4.5 5.5 v operating power supply voltage
2 multimedia ics BA7062F v cc 1pin 1k 12k 100 m a fig. 1 2pin v cc 200 5k fig. 2 3pin 200 fig. 3 v cc 4pin 200 10k fig. 4 v cc 6pin 100 10 m a fig. 5 v cc 8pin 1k 3k 3k 3k 3k 3k 3k fig. 6 input / output circuits pin descriptions pin no. 1 2h d 3 4v d 5 6 7 8 horizontal oscillator resistor h d output sync output (open collector) v d output gnd video input power supply phase comparator output function
3 multimedia ics BA7062F electrical characteristics (unless otherwise noted, ta = 25? and v cc = 5v) parameter symbol min. typ. max. unit i q 2.0 4.1 6.2 ma v syn-min. 0.08 0.15 v p-p v p-l 0.1 0.3 v v p-h 4.7 4.9 v f h-o 13.9 15.7 17.5 khz 2.1 2.9 khz t hph ? 1.0 0 + 1.0 m s t hd 10.5 11.5 12.5 m s t vd 200 260 320 m s d f cap quiescent current minimum sync separation level pulse voltage, low pulse voltage, high capture range lock-in phase h d pulse width v d pulse width conditions 2pin 4pin 2pin ? 6pin pin 3 open pin 6 terminated with 75 w resistor 2, 4 pin 2, 4 pin no input signal, i 1 = open s not designed for radiation resistance. (horizontal) free-running frequency measurement circuit 8 7 6 5 1 2 3 4 i i 100p 130k v t v t v t 1 m 1 m 1 m 75 video in + + + a 47 m 0.022 m 39k v cc 2200p 470k 10k v cc fig. 7 circuit operation (1) synchronization separation circuit detects the charging current to a externally-connected capacitor, and performs synchronization separation. (2) horizontal oscillation circuit when a video signal is input, it is synchronized with hsync by the pll. the horizontal free-running frequen- cy is determined by external resistor r 1 . (3) vertical synchronization separation circuit when a video signal is input, synchronization signal separation is done over the vertical synchronization pulse interval. f h-o = [khz] 2.05e6 r 1
4 multimedia ics BA7062F ntsc signal odd-number field (in) (out) vertical synchronizing pulse interval v d 1 / 2h ntsc signal even field (in) h d odd field (out) h d even field (out) (1) the rise and fall positions for v d are basically the same for both odd and even fields. (2) h d shifts by 1 / 2h during the odd and even field interval. fig. 8 v in , h d , and v d timing charts
5 multimedia ics BA7062F application example (1) connect pin 1 to gnd via a 120k w (approx.) resistor. leave pins 2, 4 and 8 open. (2) sync output polarity (pin 3) is positive. (3) the delay time for rising edge of the sync output (pin 3) with respect to the falling edge of sync for the vsig input signal (pin 6) is 850ns (reference value). (4) the delay time for falling edge of the sync output (pin 3) with respect to the rising edge of sync for the vsig input signal (pin 6) is 450ns (reference value). attached components resistor r 1 should have a tolerance of 2%, and a temperature coefficient of 100ppm or lower. ?when sync sepa output only is used. h d and v d unused. fig. 9 100p c 4 r 1 r 2 470k 130k 10k v d sync h d h.osc phase comp sync sepa 8 7 6 1 2 3 4 c 3 10k 1 m r 3 c 2 + 2200p c 5 c 6 47 m 0.022 m + c 7 c 1 r 4 330 1 m r 5 470k + + + 5 v.sepa v sig v cc = 5v v cc = 5v 470k r 2 r 3 10k 8 c 2 c 3-2 0.47 m c 3-1 0.47 m 2200p 1 000p v cc * by configuring the circuit enclosed in the dotted line to that in the diagram on the right, you can decrease the lock-in time and increase the capture range. * r 1 120k 10k v d sync h d h.osc phase comp sync sepa 8 7 6 1 2 3 4 c 5 c 6 47 m 0.022 m + c 7 c 1 r 4 330 1 m r 5 470k + 5 v.sepa v sig v cc = 5v v cc = 5v fig. 10 1000p
6 multimedia ics BA7062F electrical characteristic curves power supply voltage (v) i cc current (ma) 6 5 4 3 2 1 0 4.0 5.0 6.0 fig. 11 quiescent current vs. power supply voltage temperature ( c) i cc current (ma) v cc = 5v 6.0 5.5 5.0 4.0 4.5 3.5 2.5 3.0 ?25 0 25 50 75 100 fig. 12 quiescent current vs. temperature horizontal frequency (khz) 16.4 16.2 16.0 15.6 15.4 15.2 15.8 4.5 5.0 5.5 fig. 13 horizontal free-running frequency vs. power supply voltage power supply voltage (v) fig. 14 horizontal free-running frequency vs. temperature v cc = 5.0v temperature ( c) horizontal frequency (khz) 16.6 16.4 16.2 15.8 15.6 15.4 16.0 ?25 0 25 50 75 100 15.2 fig. 15 h d pulse width vs. temperature temperature ( c) h d pulse width ( m s) 12.0 11.8 11.6 11.2 11.0 10.8 10.6 11.4 ?25 0 25 50 75 100 ntsc v cc = 5.0v fig. 16 v d pulse width vs. temperature ntsc v cc = 5.0v temperature ( c) v d pulse width ( m s) 290 280 270 250 240 230 220 260 ?25 0 25 50 75 100 ?lock + cap + lock ?cap frequency: f (cap. lock) (khz) 15 10 20 5.5 5.0 4.5 fig. 17 capture range / lock range vs. power supply voltage power supply voltage (v) temperature ( c) ?lock + cap + lock ?cap frequency: f (cap. lock) (khz) 15 10 20 100 0255075 ?25 v cc = 5.0v fig. 18 capture range / lock range vs. temperature fig. 19 time from no signal to pull in frequency (khz) signal - lock in time (ms) 100 200 0 300 20 18 19 14 15 16 17 13 v cc = 5.0v f lock = 15.734khz
7 multimedia ics BA7062F frequency (khz) power lock in time (ms) 200 100 500 400 300 0 700 600 20 18 19 14 15 16 17 13 v cc = 5.0v f lock = 15.734khz fig. 20 time from power on to pull in operation notes ?make the ground line as thick as possible. ?keep power supply noise to a minimum. external dimensions (units: mm) sop8 0.4 0.1 1.27 0.15 0.3min. 0.15 0.1 0.11 6.2 0.3 4.4 0.2 5.0 0.2 85 4 1 1.5 0.1
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