1 multimedia ics 3-channel 75 w driver with y / c mix BA7665FS the BA7665FS has three 75 w driver circuits with 6db amplifiers, and includes a y / c mix circuit. the ic can pro- vide a 75 w drive with a composite y signal, c signal, or a y / c mix signal. dual-circuit drive capacity for each load is provided, and a sag compensation function is provided to allow use of smaller coupling capacitors. the composite y signal input is a sync-tip clamp input, and the chroma input is a biased input. the three channels can be simultaneously muted, or the chroma signal only (in the case of c / y output, only y is output), and output short circuit protection and power save circuits are also provided. applications digital av equipment, dvd and dvc players features 1) y / c mix circuit. 2) low power consumption (typ. 130mw). 3) output mute circuit. 4) power save circuit. 5) output protection circuit. 6) sag compensation circuit allows small output cou- pling capacitors. 7) two-circuit drive possible for loads. 8) compact ssop-a 16-pin package. absolute maximum ratings (ta = 25?) parameter symbol limits unit power supply voltage power dissipation operating temperature storage temperature v cc pd topr tstg 8 650 * ?25 ~ + 75 ?55 ~ + 125 v mw c c * reduced by 6.5mw for each increase in ta of 1 c over 25 c. recommended operating conditions (ta = 25?) parameter symbol unit max. typ. min. power supply voltage v cc 4.5 5.5 5.0 v s not designed for radiation resistance.
2 multimedia ics BA7665FS electrical characteristics (unless otherwise noted, ta = 25?, v cc = 5v) parameter symbol min. typ. max. unit conditions circuit current maximum output level frequency characteristics inter channel crosstalk mute attenuation mute switch high level mute switch low level input impedance i cc v om g f c t m t v thh v thl z in 13.0 2.6 ?1.0 2.5 0 16 26.0 3.0 0.0 ?60 ?60 20 39.0 1.0 v cc 1.0 24 ma v p-p db db db v v k w no signal f = 1khz, thd = 1 % f = 7mhz / 1mhz, 1v p-p f = 4.43mhz, 1v p-p f = 4.43mhz, 1v p-p chroma input pin (pin 7) block diagram + 6db mute 75 w 6db 75 w 6db 75 w 20k 1 2 3 4 5 6 7 8 mutea ina gnd gnd gnd n.c. inb muteb 16 15 14 13 12 11 10 9 v cc 1 outa1 outa2 v cc 2 mixout1 mixout2 n.c. outb chroma mute
3 multimedia ics BA7665FS measurement circuit + 6db mute 75 w 6db 75 w 6db 75 w n.c. n.c. 20k + + + 100 m f 22 m f 0.1 m f 47 m f 1 3.3v 1.2v 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 chroma mute a v + + 100 m f 22 m f v 0.1 m f v sw16 1 2 75 w 75 w 75 w 1 1 2 2 3 sw1 sw2 + 1 m f + 1 m f 1 2 3 1 2 3 0.1 m f 0.1 m f 3.3v 1.2v sw7 sw8 v fig.1
4 multimedia ics BA7665FS measurement conditions parameter symbol measurement method switch conditions circuit current maximum output level frequency characteristics crosstalk mute attenuation chroma mute attenuation input impedance voltage gain inter-channel voltage gain differential i cc v om1 v om2 v om3 g f1 g f2 g f3 g t1 g t2 m t1 m t2 m t3 m tc1 m tc2 z in g v1 g v2 g v3 d g vc outa mixout outb outa mixout outb outb ? outa outa ? outb outa mixout outb mixout outb outa mixout outb note 1 note 2 note 3 note 4 note 5 note 5 note 6 note 7 note 8 sw 1 2 3 3 3 3 3 3 3 3 1 1 1 3 3 3 3 3 3 sw 2 1 2 2 1 2 2 1 1 2 2 2 1 1 1 1 2 2 1 sw 7 1 1 1 2 1 1 2 2 1 1 1 2 2 2 3 1 1 2 sw 8 2 3 3 3 3 3 3 3 3 3 3 3 1 1 3 3 3 3 sw 16 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 * the mute switch level was substituted by using h = 2.4v and l = 1.1v for the above measurements. measurement method note 1: measure the quiescent current. note 2: connect a distortion meter to the output, and input a f = 1khz sine wave. adjust the output level until the output distortion is 1%. the output voltage at this time is the maximum output level v om [v p-p ]. note 3: input 1v p-p , 7mhz and 1mhz sine waves, and measure the corresponding outputs v o7 and v o1 . the frequency characteristic is given by g f = 20 * log (v o7 / v o1 ) [db]. note 4: input a 1v p-p , 4.43mhz sine wave, and measure the output vo [v p-p ] the interchannel crosstalk is given by c t = 20 * log (v o / v in ) [db]. note 5: input a 1v p-p , 4.43mhz sine wave, and measure the output vo [v p-p ] the mute attenuation is given by m t = 20 * log (v o / v in ) [db]. note 6: measure the input pin voltage v in 50 when a current of dc50 m a is flowing into the input pin. measure the input pin open-circuit voltage. the input impedance is given by z in = | v in50 ?v in0 | / 50 * 10 3 [k w ]. note 7: input a 1v p-p , 4.43mhz sine wave, and measure the output v o [v p-p ] the voltage gain is given by gv = 20 * log (v o / v in ) [db]. note 8: d g vc = | g v1 ?g v2 | [db]
5 multimedia ics BA7665FS parameter symbol min. typ. max. unit conditions voltage gain interchannel voltage gain g v d g v 5.5 ?0.5 6.0 0.0 6.5 0.5 db db f = 4.43mhz, 1v p-p f = 100khz, 1v p-p guaranteed design values (unless otherwise noted, ta = 25?, v cc = 5v) mute sw mode settings 3ch mute ?mutea (1pin) h normal l chroma mute ?muteb (8pin) h normal l pin descriptions and equivalent i / o circuits pin. no pin name in out standard potential equivalent i / o circuit pin description 1 mutea muteb k k 2.0v k 2.0v 0v 1 8 2 7 3 4 5 ina inb gnd mute control pin when mute a (pin 1) goes high, all three channels are muted at the same time. when mute b (pin 8) goes high, outb and the mixout chroma signals are muted. signal input pin this is the input pin for the composite y signal (sync-tip clamp input). ground pin signal input pin bias-type input pin for the chroma signal. the input impedance is 20k w . 15k 8k 20k gnd
6 multimedia ics BA7665FS pin. no pin name in out standard voltage equivalent i / o circuit pin description 9 outb k 2.4v k 0.9v 0.95v 11 12 mixout2 mixout1 k 0.9v 0.95v 14 15 outa2 outa1 5.0v 5.0v 13 16 v cc 2 v cc 1 signal output pin chroma signal output pin. when this drops below 0.2v, the protection circuit operates and the ic enters power save mode. signal output pin y / c signal output pin. pin 11 is the sag compensation pin. when pin 12 is taken below 0.2v, the protection cir- cuit operates and the ic enters power save mode. signal output pin composite y signal output pin. pin 14 is the sag compensation pin. when pin 15 is taken below 0.2v, the protection circuit operates and the ic enters power save mode. power supply pin v cc 1 and v cc 2 are not connected internally. use with them connected externally. 11pin 12pin 14pin 15pin v cc
7 multimedia ics BA7665FS + 6db mute 75 w 6db 75 w 6db 75 w 6db 75 w n.c. 20k n.c. + + + + 75 w 75 w 75 w 75 w 100 m f 22 m f + + 75 w + 75 w 100 m f 75 w 75 w 0.1 m f 1000 m f 22 m f 47 m f 1 m f 0.1 m f 0.1 m f 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 composite y chroma chroma mute when you will not use the sag compensation function fig.2 application example
8 multimedia ics BA7665FS ssop-a16 0.36 0.1 0.8 0.11 6.6 0.2 4.4 0.2 6.2 0.3 1.5 0.1 1 16 8 9 0.15 0.3min. 0.15 0.1 external dimensions (units: mm)
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