1 multimedia ics 3-channel 75 w driver bA7660FS the bA7660FS is a 75 w driver with a 6db amplifier and three internal circuits, and provides 75 w drive of composite y signals and c signals, as well as rgb signals. each load is capable of driving two circuits, and a sag correction function reduces the capacitance of the output coupling capacitor. the input voltage is within a range of 0v to 1.5v, enabling direct connection of ordinary d / a converter output. an internal power-saving circuit is also included which provides simultaneous muting on all three channels, and output pin shorting protection. applications dvds, set top boxes and other digital video devices features 1) can be coupled directly to d / a converter output. 2) operates at a low power consumption (115mw typ.). 3) internal output muting circuit. 4) internal power-saving circuit. 5) internal output protection circuit. 6) an internal sag correction function makes it possible to reduce the capacitance of the output coupling capacitor. 7) each load is capable of driving two circuits. 8) the compact 16-pin ssop-a package is used. absolute maximum ratings (ta = 25?) parameter symbol vcc pd topr tstg limits unit 8 650 ?25 ~ + 75 ?55 ~ + 125 v mw c c power supply voltage power dissipation operating temperature storage temperature recommended operating conditions (ta = 25?) parameter symbol vcc min. 4.5 typ. 5.0 max. 5.5 unit v operating power supply voltage
2 multimedia ics bA7660FS block diagram mute ina gnd inb gnd n.c. inc gnd 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 outa1 v cc outa2 outb1 outb2 n.c. outc1 outc2 75 w 6db 75 w 6db 6db 75 w h 3ch mute mute (1pin) normal l
3 multimedia ics bA7660FS pin descriptions and input / output circuits pin. no pin name in out reference voltage equivalent circuit function 1 mute k k 2 4 7 ina inb inc k 0.9v 0.95v 14 12 9 15 13 10 outa2 outb2 outc2 outa1 outb1 outc1 5.0v 16 v cc muting control if mute (pin 1) is set to high, muting is carried out simultaneously on all three channels. signal input input signals consist of composite video signals, y signals, c signals, rgb, and others. the input level is within a range of 0 to 1.3 (min.) to 1.5 (typ.). 0v 3 5 8 gnd ground signal output the signal output level is (0.9 + 2 input voltage [v]). pins 9, 12, and 14 are the pins for sag correction. if pins 10, 13, and 15 are set to 0.2v or less, the protective circuit is triggered and the power-saving mode is accessed. power supply 15k 8k gnd 15pin 13pin 10pin 14pin 12pin 9pin vcc
4 multimedia ics bA7660FS electrical characteristics (unless otherwise noted, ta = 25?, v cc = 5v) parameter symbol min. typ. max. unit conditions circuit current i cc 11.4 22.8 34.2 ma maximum output level vom 2.6 3.0 v p- p voltage gain g v 5.5 6.0 6.5 db frequency characteristic g f 1.0 0.0 1.0 db muting attenuation with no signal f = 1khz,thd = 1% f = 4.43mhz,1v p- p f = 7mhz / 1mhz,1v p- p f = 4.43mhz,1v p- p m t ?0 db muting switching level high v thh 3.5 v cc v muting switching level low v thl 0 1.0 v measurement circuit 1 2 3 4 5 6 7 8 75 w 6db 75 w 6db 75 w 6db 16 15 14 13 12 11 10 9 sw1 sw2 2 3.3v 1 1.2v 3 1 m f 1 430k 75k sw4 n.c. sw7 sw16 2 v cc 1 0.1 m f47 m f n.c. 100 m f 22 m f 75 w 75 w 75 w 1 m f 2 1 m f 1 430k 75k 1 m f 2 1 m f 1 430k 75k 1 m f 2 v a 100 m f 22 m f v 100 m f 22 m f v guaranteed design parameters (unless otherwise noted, ta = 25?, v cc = 5v) parameter symbol min. typ. max. unit conditions differential gain dg 0.5 1.5 % differential phase dp 0.5 1.5 deg interchannel crosstalk c t ?055db interchannel voltage gain differential d g v 0.5 0.0 0.5 db 1.0v p- p reference staircase signal 1.0v p- p reference staircase signal f = 4.43mhz,1v p- p f = 4.43mhz,1v p- p
5 multimedia ics bA7660FS note 1: measure the circuit current when no signal is present. note 2: apply a sine wave of f = 1khz to the input, and adjust the input level so that the output distortion is 1%. at this time, set the out- put voltage to the maximum output level of v om [v p-p ]. note 3: measure the output v o [v p-p ] with a sine wave of f = 4.43mhz, 1v p-p applied to the input. voltage gain g v is: g v = 20 log (v o / v in ) [db] note 4: measure the outputs v o 7 and v o 1 [v p-p ] each with sine waves of f = 7mhz, 1v p-p and f = 1mhz, 1v p-p applied to the input. voltage frequency g f is: g f = 20 log (v o7 / v o1 ) [db] note 5: measure the output v o [v p-p ] with a sine wave of f = 4.43mhz, 1v p-p applied to the input. interchannel crosstalk c t is: c t = 20 log (v o / v in ) [db] note 6: measure the output v o [v p-p ] with a sine wave of f = 4.43mhz, 1v p-p applied to the input. the muting attenuation m t is: m t = 20 * log (v o / v in ) [db] measurement condition settings table item symbol measurement method switch conditions circuit current maximum output level voltage gain frequency characteristics crosstalk between channels muting attenuation i cc v om1 v om2 v om3 g v1 g v2 g v3 g f1 g f2 g f3 c t1 c t2 c t3 c t4 c t5 c t6 m t1 m t2 m t3 outa outb outc outa outb outc outa outb outc outa ? outb outa ? outc outb ? outa outb ? outc outc ? outa outc ? outb outa outb outc note 1 note 2 note 3 note 4 note 5 note 6 sw 1 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 1 1 1 sw 2 1 2 1 1 2 1 1 2 1 1 2 2 1 1 1 1 2 1 1 sw 4 1 1 2 1 1 2 1 1 2 1 1 1 2 2 1 1 1 2 1 sw 7 1 1 1 2 1 1 2 1 1 2 1 1 1 1 2 2 1 1 2 sw 16 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 * the muting switching level is substituted by carrying out the above measurement at high = 3.3v, low = 1.2v.
6 multimedia ics bA7660FS 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 75 w 6db 75 w 6db 75 w 6db 75 w when the sag correction function is used. 6db composite video d / a d / a d / a composite y n.c. chroma mute 5v n.c. 1000 m f + 75 w 75 w vcc 0.1 m f47 m f + 1000 m f + 75 w 75 w 75 w 1000 m f + 75 w 75 w 75 w 100 m f + 22 m f + application example 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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