ROHM BA7655AF, BA7655A Datasheet
1
Multimedia ICs
Dual Voltage-controlled Amplifier
BA7655A / BA7655AF
The BA7655A and BA7655AF are dual voltage-controlled amplifier ICs designed for use in camcorders and VCRs.
By varying the control voltage the amplifier gain can varied from -6dB to +6dB. When the control pin voltage drops
below 1V the amplifier enters Power Save Mode which mutes the output and reduces the current drawn by the IC.
•
Applications
Video cassette recorders and camcorders
•
Features
1) Wide bandwidth.
2) Wide dynamic range.
3) Low power cousumption.
4) Output muting possible.
5) Low voltage gain temperature drift.
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Block diagram
VCA2
VCA1
GNDOUT1CTL1IN1
IN2 CTL2 OUT2
5678
1234
VCC
2
Multimedia ICs BA7655A / BA7655AF
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Pin descriptions
Pin name
1 IN1 Input 1
2 CTL1 Control 1
3 OUT1 Output 1
4 GND GND
5 OUT2 Output 2
6 CTL2 Control 2
7 IN2 Input 2
8V
CC Power supply
Pin No. Function
•
Input circuits
2, 6
1, 7
3, 5
V
CC
VCC
40k
40k
V
CC
(Typ.)
(Typ.)
3.0V (Typ.)
1m (Typ.)
2.5V
(Typ.)
•
Absolute maximum ratings
Parameter Symbol Unit
Power supply voltage V
CCMax. 8.0 V
Power dissipation Pd
500 (BA7655A : DIP8)
∗
1
350 (BA7655AF : SOP8)
∗
2
mW
Operating temperature Topr °C
Storage temperature Tstg °C
– 20 ~ + 80
– 55 ~ + 125
∗
1 Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.
∗
2 Reduce by 3.5mW for each increase in Ta of 1°C over 25°C, when mounted on a 50mm × 50mm.
Limits
•
Recommended operating conditions (Ta = 25°C)
Parameter Symbol Limits Unit
Power supply voltage V
CC 4.5 ~ 5.5 V
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