1
Multimedia ICs
75
driver IC with 3 internal circuits
BA7622F
The BA7622F is a 75
driver-IC developed for use in video equipment. It includes three 75
driver circuis,two of
which have sync-tip clamp inputs.The other driver has a biased input terminated with a 20k
resistor.Each output
can drive two loads (75
2).
Applications
Video cassette recorders, televisions and camcorders
Features
1) Two built-in clamp circuits.
2) Simultaneous drive of Y, C and composite video sig-
nals possible.
3) Each output can drive two loads.
Absolute maximum ratings (Ta = 25C)
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.
2
Multimedia ICs
BA7622F
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 20k
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
Block diagram
GND
IN1
IN2
IN3
OUT1
OUT2
OUT3
V
CC
NO Clamp
Clamp
Clamp
20k
1
2
3
4
8
7
6
5
75
driver
75
driver
75
driver
3
Multimedia ICs
BA7622F
Electrical characteristics (unless otherwise noted, Ta = 25C and V
CC
= 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
%
Z
IN
3
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
k
T
HD
32
Operating voltage
Circuit current
Maximum output level
Voltage gain
Frequency characteristics
Differential gain 75
drive 1
Differential phase 75
drive 1
Differential gain 75
drive 2
Differential phase 75
drive 2
Interchannel crosstalk
Input impedance (VIN3)
Total-harmonic distortion (VIN3)
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
Input / output circuits
V
CC
20k
6, 7, 8
OUT1, 2, 3
V
CC
100
A
IN1, 2
2, 3
V
CC
100
A
IN3
4
20k
10k
4
Multimedia ICs
BA7622F
Measurement circuit
1
2
3
4
SWC
V
CC
= 5V
V
~
~
OSC
SG
600
1
1
1
200
A
50
A
75
1000
+
75
75
75
OSC
SG
OSC
SG
V
~
600
1
1
1
4
V
CC
= 5V
V
~
~
600
1
1
1
1
2
3
4
SWA
~
1
2
3
SWB
200
A
V
CC
= 5V
1
75
driver
2
3
4
75
driver
75
driver
Clamp
Clamp
20k
NO Clamp
5
75
470
+
75
6
75
470
+
75
7
75
470
+
75
8
0.022
F
47
F
Analyzer
Audio
1
2
3
SWF
Vector
Scope
2
3
Analyzer
Audio
1
2
3
SWD
1
SWE
Vector
Scope
Analyzer
Audio
Vector
Scope
V
~
V
~
V
~
V
CC
= 5V
+
+
+
+
+
+
+
+
+
+
Fig.1
The circuit for driving one 75
output load.
The circuit for driving two 75
output loads is as.
5
Multimedia ICs
BA7622F
Measurement conditions
IN1
IN2
IN3
OUT1
OUT2
OUT3
SWA
SWB
SWC
SWD
SWE
SWF
3
3
3
--
--
--
V
om
12
1
3
3
3
1
V
om
22
3
1
3
3
V
om
32
3
3
1
3
G
v
12
1
3
3
3
2
G
v
22
3
1
3
3
G
v
32
3
3
1
3
f12
1
3
3
3
f22
3
1
3
3
f32
3
3
1
3
C
T
112
1
3
3
3
C
T
113
1
3
3
3
C
T
211
3
1
3
3
C
T
213
3
1
3
3
C
T
311
3
3
1
3
C
T
312
3
3
1
3
T
HD
12
1
3
3
3
4
T
HD
22
3
1
3
3
T
HD
32
3
3
1
3
Z
IN
3
3
3
4
3
I
CC
Parameter
Symbol
Conditions
1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the input level until the output distortion is 0.5%. 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
).
3: Measure the input pin voltage V
IN
50 when a current of DC50
A is flowing into the input pin. Measure the input pin open-circuit voltage V
IN
0.
The input impedance is given by Z = (V
IN
50 - V
IN
0) / 50
10
-6
[
].
4: Input a 1.0V
P-P
, 1kHz sine wave. Connect a distortion meter to the output and measure the total-harmonic distortion.
Current dissipation
Maximum output level
Voltage gain
Frequency characteristic
Interchannel crosstalk
Total-harmonic distortion
Input resistance
: Any of switches 1, 2, or 3 possible.
PDF 
ZIP