ROHM BA7622F Datasheet
1
Multimedia ICs
75Ω driver IC with 3 internal circuits
BA7622F
The BA7622F is a 75Ω driver-IC developed for use in video equipment. It includes three 75Ω driver circuis,two of
which have sync-tip clamp inputs.The other driver has a biased input terminated with a 20kΩ resistor.Each output
can drive two loads (75Ω × 2).
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Applications
Video cassette recorders, televisions and camcorders
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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.
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Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol Limits Unit
8.0 V
Pd mW
Topr °C
Tstg °C
550
∗
V
CC
– 25 ~ + 75
– 55 ~ + 125
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
∗
Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
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Multimedia ICs BA7622F
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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 20kΩ 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
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Block diagram
GND
IN1
IN2
IN3
OUT1
OUT2
OUT3
VCC
NO Clamp
Clamp
Clamp
20k
1
2
3
4
8
7
6
5
75Ω
driver
75Ω
driver
75Ω
driver
3
Multimedia ICs BA7622F
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Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 5V, and load is two system drive)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
4.5 5.0 5.5 V
—mA
V
om —
—
—
Gv 0 dB
Gf – 3 0 dB
DG1 — 0.4 1.0 %
DP1 — 0.4 1.0
DG2 — 0.7 2.0 %
DP2 — 0.7 2.0
C
T — – 60 — dB
— 0.1 0.5 %
ZIN3 17 20 23
2.8
– 1.2
23.6
3.3
– 0.6
35.4
1.3
deg
deg
V
CC
I
CC
V
P-P
kΩ
T
HD32
Operating voltage
Circuit current
Maximum output level
Voltage gain
Frequency characteristics
Differential gain 75Ω drive 1
Differential phase 75Ω drive 1
Differential gain 75Ω drive 2
Differential phase 75Ω drive 2
Interchannel crosstalk
Input impedance (VIN3)
Total-harmonic distortion (VIN3)
No signal
f = 1kHz, THD = 1.0%
f = 1MHz, V
IN = 2.0VP-P
10MHz / 1MHz, VIN = 1.0VP-P
VIN = 2.0VP-P, standard staircase signal
V
IN = 2.0VP-P, standard staircase signal
V
IN = 2.0VP-P, standard staircase signal
V
IN = 2.0VP-P, standard staircase signal
f = 4.43MHz, V
IN = 2.0VP-P
f = 1kHz, VIN = 1.0VP-P
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Input / output circuits
VCC
20k
6, 7, 8
OUT1, 2, 3
VCC
100µA
IN1, 2
2, 3
VCC
100µA
IN3
4
20k
10k
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