1 multimedia ics sync separator ic with afc ba7046 / BA7046F the ba7046 and BA7046F separate the synchronization signals from a video signal and output the horizontal and vertical synchronization signals (h d and v d ), and the composite synchronization signal (sync-out). the h d and v d pulse phase difference is guaranteed. applications tvs and vcrs features 1) built-in afc circuit. 2) h d and v d phase difference guaranteed. 3) low power dissipation. (approx. 21mw) 4) low external parts count. 5) 8-pin dip / sop package. 6) horizontal free-run frequency does not require adjustment. absolute maximum ratings (ta = 25?) ba7046 (dip) BA7046F (sop) recommended operating conditions (ta = 25?) parameter symbol unit v cc max. 8.0 v 500 * mv topr c tstg c pd limits ? 20 ~ + 75 ? 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature * reduced by 5mw for each increase in ta of 1 c over 25 c. parameter symbol unit 8.0 v 350 * mw topr c tstg c pd v cc max. limits ? 20 ~ + 75 ? 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature * when mounted on a 50mm 50mm pcb board, reduced by 3.5mw for each increase in ta of 1 c over 25 c. parameter symbol min. typ. max. unit v cc 4.5 5.5 v operating power supply voltage
2 multimedia ics ba7046 / BA7046F input / output circuits v cc 1pin 1k 12k 100 m a fig. 1 200 v cc 10k 4pin fig. 4 v cc 100 6pin 10 m a fig. 5 8pin v cc 3k 3k 3k 3k 3k 3k 1k fig. 6 5k v cc 2pin 200 fig. 2 3pin 200 fig. 3 block diagrams pin descriptions 1 2 3 4 8 7 6 5 h. osc v. sepa phase comp sync sepa 1 2 3 4 5 6 7 8 pin no. 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 ba7046 / BA7046F electrical characteristics (unless otherwise noted ta = 25? and v cc = 5.0v) parameter symbol min. typ. max. unit conditions i q 2.0 4.1 6.2 ma 0.08 0.15 0.1 0.3 v 4.7 4.9 v 13.9 15.7 17.5 khz 2.1 2.9 khz t hph ? 1.0 0 + 1.0 m s pin2 pin ? 6 t hvd 17.0 23.5 30.0 m s pin4 pin ? 2 t hd 4.6 5.1 5.6 m s pin2 t vd 190 230 270 m s pin4 v syn-min. v p-l v p-h f h-o v p-p d f cap pins 2, 4 s not designed for radiation resistance. quiescent current minimum synchronization separation level pulse voltage, low pulse voltage, high (horizontal) free-running frequency capture range lock-in phase difference h d , v d phase difference h d pulse width v d pulse width pin 3 open pin 6 terminated with 75 w resistor pins 2, 4 no input signal, i 1 = open measurement circuit 8 7 6 5 1 2 3 4 i i 100p 130k v t v t v t 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 frequency is determined by external resistor r1. (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 ba7046 / BA7046F v in , h d and v d timing charts 1 / 2h (out) v d fig. 8 ntsc signal odd field (in) 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. (3) only the odd field is given for the specification. vertical synchronization pulse interval h d , v d phase difference
(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. 5 multimedia ics ba7046 / BA7046F application example 8 8 7 6 5 r 2 470k h. osc v. sepa phase comp sync sepa c 2 c 7 c 1 c 5 c 6 r 3 r 4 0.022 m 47 m 1 m 1 m + c 3 + + 2200p 1000p 470k 330 10k r 3 470k r 2 vsig c 4 100p r 1 130k h d sync v d 10k v cc = 5v r 5 10k 1 2 3 4 v cc = 5v c 3-1 0.47 m c 3-2 0.47 m c 2 2200p v cc * fig.9 * 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. 8 7 6 5 h. osc v. sepa phase comp sync sepa c 7 c 1 c 5 c 6 r 4 v cc = 5v v cc = 5v 0.022 m 47 m 1 m + + 1000p 470k 330 vsig r 1 120k h d sync v d 10k r 5 1 2 3 4 fig. 10 ?when sync sepa output only is used. h d and v d unused.
6 multimedia ics ba7046 / BA7046F electrical characteristic curves h d ?v d pulse timing ( m s) ?25 0 25 50 75 100 40 30 20 10 0 50 60 70 ntsc v cc = 5.0v temperature ( c) fig. 17 h d , v d phase difference vs. temperature frequency : f (csp. lock) (khz) power supply voltage (v) 20 15 10 4.5 5.0 5.5 + lock + cap ?lock ?cap fig. 18 capture range / lock range vs. power supply voltage frequency : f (csp.lock) (khz) temperature ( c) ?25 0 25 50 75 100 v cc = 5.0v + lock + cap ?lock ?cap 20 15 10 fig. 19 capture range charging / lock range vs. temperature horizontal frequency : f (khz) temperature ( c) 15.2 v cc = 5.0v 15.4 15.6 15.8 16.0 16.2 16.4 16.6 ?25 0 25 50 75 100 fig. 14 horizontal free-running frequency vs. temperature h d pulse width : h d ( m s) temperature ( c) ntsc v cc = 5.0v 4.4 4.6 4.8 5.0 5.2 5.4 5.6 5.8 ?25 0 25 50 75 100 fig. 15 h d pulse width vs. temperature v d pulse width : v d ( m s) temperature ( c) ntsc v cc = 5.0v ?25 0 25 50 75 100 180 190 200 210 220 230 240 250 fig. 16 v d pulse width vs. temperature current : i cc (ma) power supply voltage (v) 6 5 4 3 2 1 0 4.0 5.0 6.0 fig. 11 quiescent current vs. power supply voltage current : i cc (ma) temperature ( c) 6.0 5.5 4.5 4.0 5.0 3.0 2.5 3.5 ?25 0 25 50 75 100 v cc = 5.0v fig. 12 quiescent current vs. temperature horizontal frequency : f (khz) power supply voltage (v) 16.4 16.2 16.0 15.8 15.6 15.4 15.2 4.5 5.0 5.5 fig. 13 horizontal free-running frequency vs. power supply voltage
7 multimedia ics ba7046 / BA7046F operation notes ?make the ground line as thick as possible. ?keep power supply noise to a minimum. external dimensions (units: mm) signal - lock in time (ms) frequency (khz) 13 14 15 16 17 18 19 20 300 200 100 0 v cc = 5.0v f lock = 15.734khz fig. 20 time from no signal to pull in power lock in time (ms) frequency (khz) 13 14 15 16 17 18 20 700 600 500 400 300 200 100 0 v cc = 5.0v f lock = 15.734khz 19 fig. 21 time from power on to pull in ba7046 BA7046F dip8 sop8 0.5 0.1 3.2 0.2 3.4 0.3 85 14 9.3 0.3 6.5 0.3 0.3 0.1 0.51min. 2.54 0 ~ 15 7.62 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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