ROHM BA7623F Datasheet
1
Multimedia ICs
75Ω driver IC with 3 internal circuits
BA7623F
The BA7623F is a 75Ω driver-IC developed for use in video equipment. Since the input is coming directly with no
bias at the base pin, the DC potential for the previous stage can be used for direct DC coupling. Each output can
drive two loads (75Ω×2).
•
Applications
Video cassette recorders, televisions and camcorders
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Block diagram
GND
IN1
IN2
IN3
OUT1
OUT2
OUT3
V
CC
1
2
3
4
8
7
6
5
75Ω
driver
75Ω
driver
75Ω
driver
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Features
1) Can be directly coupled to the previous circuit.
2) Each output can drive two loads.
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Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol Limits Unit
V
CC
8.0 V
Pd 550
∗
mW
Topr – 25 ~ + 75 °C
Tstg – 55 ~ + 125 °C
∗
Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
2
Multimedia ICs BA7623F
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Pin descriptions
1 GND
2 IN1
3 IN2
4 IN3
5
6 OUT3
7 OUT2
8 OUT1
V
CC
Pin No.
Ground connection
Direct-coupling input
Input composite video or component video (RGB) signals.
Keep the input signal level in the range 0.5V to 3.8V.
Direct-coupling input
Input composite video or component video (RGB) signals.
Keep the input signal level in the range 0.5V to 3.8V.
Direct-coupling input
Input composite video or component video (RGB) signals.
Keep the input signal level in the range 0.5V to 3.8V.
FunctionPin name
Power supply
Direct-coupling output
Output for the signal input to IN3. When connected to earth a protection circuit operates,
and the IC enters power-save mode.
Direct-coupling output
Output for the signal input to IN2. When connected to earth a protection circuit operates,
and the IC enters power-save mode.
Direct-coupling output
Output for the signal input to IN1. When connected to earth a protection circuit operates,
and the IC enters power-save mode.
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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
— 25.2 37.8 mA
V
om 2.9 3.4 — V
P-P
– 1.0 – 0.5 0 dB
Cf – 3 0 1 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
T
HD — 0.1 0.5 %
V
CC
I
CC
G
V
deg
deg
Operating voltage
Supply current
Maximum output level
Voltage gain
Frequency characteristic
Differential gain 75Ω drive 1
Differential phase 75Ω drive 1
Differential gain 75Ω drive 2
Differential phase 75Ω drive 2
Interchannel crosstalk
Total harmonic distortion
V
IN = 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
No signal
f = 1kHz, THD = 1.0%
f = 1MHz, V
IN = 2.0VP-P
f = 4.43MHz, VIN = 2.0VP-P
f = 1kHz, VIN = 1.0VP-P
10MHz / 1MHz, VIN = 1.0VP-P
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