BA7622 / BA7622f multimedia ics 75 ? driver ic with 3 internal circuits BA7622 / BA7622f the BA7622 and BA7622f are 75 ? driver-ics developed for use in video equipment. the ics include three 75 ? driver circuits, two of which have sync-tip clamp inputs. the other driver has a biased input terminated with a 20k ? resistor. each output can drive two loads (75 ? 2). z applications video cassette recorders, televisions and camcorders z features 1) two built-in clamp circuits. 2) simultaneous drive of y, c and composite video signals possible. 3) each output can drive two loads. z z z z absolute maximum ratings (ta = 25c) parameter unit v BA7622 BA7622f mw c c v cc symbol pd topr tstg limits 8.0 550 800 ? 25 ~ + 75 ? 55 ~ + 125 power supply voltage power dissipation operating temperature storage temperature ? 1 reduced by 8.0mw for each increase in ta of 1 c over 25 c. (BA7622) ? 2 reduced by 5.5mw for each increase in ta of 1 c over 25 c. (BA7622f) ? 1 ? 2 z z z z block diagram gnd in1 in2 in3 out1 out2 out3 v cc no clamp clamp clamp 20k 1 2 3 4 8 7 6 5 75 ? driver 75 ? driver 75 ? driver
BA7622 / BA7622f multimedia ics z z z z pin descriptions 1 gnd 2 in1 3 in2 4 in3 5 6 out3 7 out2 8 out1 pin no. v cc ground connection clamp input input composite video or the y signal separated from y / c. clamp input input composite video or the y signal separated from y / c. biased input input the chroma signal. terminated with a 20k ? resistor. power supply biased output output for the signal input to in3. when connected to earth a protection circuit operates, and the ic enters power-save mode. clamped output output for the signal input to in2. when connected to earth a protection circuit operates, and the ic enters power-save mode. clamped output output for the signal input to in1. when connected to earth a protection circuit operates, and the ic enters power-save mode. pin name function z z z z electrical characteristics (unless otherwise noted, ta = 25 c and v cc = 5v, and load is two system drive) parameter min. typ. max. unit conditions 4.5 5.0 5.5 v ? ma ? ? ? 0db ? 30 db ? 0.4 1.0 % ? 0.4 1.0 ? 0.7 2.0 % ? 0.7 2.0 ?? 60 ? db ? 0.1 0.5 % 17 20 23 2.8 ? 1.2 23.6 3.3 ? 0.6 35.4 1.3 deg deg v p-p k ? symbol v om gv gf dg1 dp1 dg2 dp2 c t z in 3 v cc i cc t hd 32 operating voltage circuit current maximum output level voltage gain frequency characteristics differential gain 75 ? drive 1 differential phase 75 ? drive 1 differential gain 75 ? drive 2 differential phase 75 ? drive 2 interchannel crosstalk input impedance (v in 3) total-harmonic distortion (v in 3) no signal f = 1khz, thd = 1.0% f = 1mhz, v in = 2.0v p-p 10mhz / 1mhz, v in = 1.0v p-p v in = 2.0v p-p , standard staircase signal v in = 2.0v p-p , standard staircase signal v in = 2.0v p-p , standard staircase signal v in = 2.0v p-p , standard staircase signal f = 4.43mhz, v in = 2.0v p-p f = 1khz, v in = 1.0v p-p
BA7622 / BA7622f multimedia ics z z z z input / output circuits v cc 20k 6, 7, 8 out1, 2, 3 v cc 100 a in1, 2 2, 3 v cc 100 a in3 4 20k 10k z z z z measurement circuit 123 4 swc v cc = 5v v ~ ~ osc sg 600 1 1 1 200 a50 a 75 1000 + 75 75 75 osc sg osc sg v ~ 600 1 1 1 4 v cc = 5v v ~ ~ 600 1 1 1 123 4 swa ~ 123 swb 200 a v cc = 5v 1 75 ? driver 2 3 4 75 ? driver 75 ? driver clamp clamp 20k no clamp 5 75 470 + 75 6 75 470 + 75 7 75 470 + 75 8 0.022 f 47 f analyzer audio 123 swf vector scope 23 analyzer audio 123 swd 1 swe vector scope analyzer audio vector scope v ~ v ~ v ~ v cc = 5v + + + + ++ + + + + fig.1 the circuit for driving one 75 ? output load. the circuit for driving two 75 ? output loads is as.
BA7622 / BA7622f multimedia ics z z z z measurement conditions in1 in2 in3 out1 out2 out3 swa swb swc swd swe swf 333 ? ? ? 1333 ? 1 313 3 331 3 1333 ? 2 313 3 331 3 1333 313 3 331 3 133 3 133 3 3133 313 3 3313 331 3 1333 ? 4 313 3 331 3 3 3 4 ? 3 parameter v om 12 v om 22 v om 32 g v 12 g v 22 g v 32 f12 f22 f32 c t 112 c t 113 c t 211 c t 213 c t 311 c t 312 t hd 12 t hd 22 t hd 32 z in 3 i cc symbol conditions ? 1: connect a distortion meter to the output, and input a f = 1khz sine wave. adjust the input level until the output distortion is 0.5%. this output voltage at this time is the maximum output level v om (v p-p ). ? 2: input a 2.0v p-p , 1mhz sine wave. the voltage gain is given by g v = 20 log (v out / v in ). ? 3: measure the input pin voltage v in 50 when a current of dc50 a is flowing into the input pin. measure the input pin open-circuit voltage v in 0. the input impedance is given by z = (v in 50 ? v in 0) / 50 10 ? 6 [ ? ]. ? 4: input a 1.0v p-p , 1khz sine wave. connect a distortion meter to the output and measure the total-harmonic distortion. current dissipation maximum output level voltage gain frequency characteristic interchannel crosstalk total-harmonic distortion input resistance : any of switches 1, 2, or 3 possible.
BA7622 / BA7622f multimedia ics z z z z application example v cc = 5v 47 f 0.022 f 75 video out1 75 1 2 3 4 8 7 6 5 75 ? driver 75 ? driver 75 ? driver clamp clamp 1 f 20k no clamp 1 f 0.01 f composite video signal y signal c signal 1000 f + 1000 f + 1 f + yc yc 75 75 75 75 video out2 + + + fig.2 z z z z electrical characteristic curves gain: g v (db) frequency: f (hz) 20 0 ?20 ?40 100k 1m 10m 100m fig. 3 frequency characteristic gain: g v (db) frequency: f (hz) 0 20 40 60 80 100k 10m 100m 1m fig. 4 crosstalk z z z z external dimensions (units : mm) sop8 BA7622f 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 dip8 BA7622 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
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