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 recorders, televisions and camcorders
Video cassette
•
Featuresdirectly coupled to the previous circuit.
1) Can be
2) Each output can drive two loads.
•
Absolute maximum ratings (Ta = 25°C)
Parameter
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
Pd
Topr
Tstg
Limits
8.0
550
∗
– 25 ~ + 75
– 55 ~ + 125
Unit
V
mW
°C
°C
∗
Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
•
Block diagram
GND
1
75Ω
driver
8
OUT1
IN1
2
75Ω
driver
7
OUT2
IN2
3
75Ω
driver
6
OUT3
IN3
4
5
V
CC
1
Multimedia ICs
BA7623F
•
Pin descriptions
Pin No.
1
2
Pin name
GND
IN1
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.
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.
Function
3
IN2
4
5
6
IN3
V
CC
OUT3
7
OUT2
8
OUT1
•
Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter
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
Symbol
V
CC
I
CC
V
om
G
V
Cf
DG1
DP1
DG2
DP2
C
T
T
HD
Min.
4.5
—
2.9
– 1.0
–3
—
—
—
—
—
—
Typ.
5.0
25.2
3.4
– 0.5
0
0.4
0.4
0.7
0.7
– 60
0.1
Max.
5.5
37.8
—
0
1
1.0
1.0
2.0
2.0
—
0.5
Unit
V
mA
V
P-P
dB
dB
%
deg
%
deg
dB
%
CC
= 5V, and load is two system drive)
Conditions
—
No signal
f = 1kHz, THD = 1.0%
f = 1MHz, V
IN
= 2.0V
P-P
10MHz / 1MHz, V
IN
= 1.0V
P-P
V
IN
= 2.0V
P-P
, standard staircase signal
V
IN
= 2.0V
P-P
, standard staircase signal
V
IN
= 2.0V
P-P
, standard staircase signal
V
IN
= 2.0V
P-P
, standard staircase signal
f = 4.43MHz, V
IN
= 2.0V
P-P
f = 1kHz, V
IN
= 1.0V
P-P
2
Multimedia ICs
BA7623F
•
Measurement conditions
Parameter
Current dissipation
Symbol
I
cc
V
om
12
Maximum output level
V
om
22
V
om
32
G
v
12
Voltage gain
G
v
22
G
v
32
f12
Frequency characteristic
f22
f32
C
T
112
C
T
113
Interchannel crosstalk
C
T
211
C
T
213
C
T
311
C
T
312
T
HD
12
Total-harmonic distortion
T
HD
22
T
HD
32
DG1
Differential gain (DG)
DG2
DG3
DP1
Differential phase (DP)
DP2
DP3
IN1
SWA
3
1
3
3
1
3
3
1
3
3
1
1
3
3
3
3
1
3
3
2
3
3
2
3
3
IN2
SWB
3
3
1
3
3
1
3
3
1
3
3
3
1
1
3
3
3
1
3
3
2
3
3
2
3
IN3
SWC
3
3
3
1
3
3
1
3
3
1
3
3
3
3
1
1
3
3
1
3
3
2
3
3
2
OUT1
SWD
OUT2
SWE
OUT3
SWF
Conditions
—
∗
1
×
3
×
×
3
×
×
3
×
×
3
×
×
3
×
×
×
3
×
×
×
×
3
×
×
3
×
×
3
∗
2
×
3
×
×
3
—
×
3
×
3
×
×
×
×
3
×
3
×
3
—
×
×
1
×
3
×
×
1
×
×
1
×
×
×
×
3
∗
3
×
×
×
×
1
×
×
1
—
×
×
×
1
—
×:
Any of switches 1, 2, or 3 possible.
1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the input level until the output distortion is 1.0%. This output voltage
∗
at this time is the maximum output level V
om
(V
P-P
).
∗
2: Input a 2.0V
P-P
, 1MHz sine wave. The voltage gain is given by G
V
= 20 log (V
OUT
/ V
IN
)(dB).
∗
3: Input a 1.0V
P-P
, 1kHz sine wave. Connect a distortion meter to the output and measure the total-harmonic distortion.
4
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