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Part: BA7622F
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA7622F datasheet File size : 97 kB
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Datasheet text preview:
BA7622 / BA7622F
Multimedia ICs
75 driver IC with 3 internal circuits
BA7622 / BA7622F
The BA7622 and BA7622F are 75 driver-ICs developed for use in video equipment. The ICs include three 75 driver circuits, 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 signals possible. 3) Each output can drive two loads.
Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature BA7622 BA7622F Topr Tstg Symbol VCC Pd Limits 8.0 800 1 550 2 -25 ~ +75 -55 ~ +125 Unit V mW
°C °C
1 Reduced by 8.0mW for each increase in Ta of 1°C over 25°C. (BA7622) 2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C. (BA7622F)
Block diagram
GND
1
75 driver
8
OUT1
IN1
2 Clamp
75 driver
7
OUT2
IN2
3 Clamp
75 driver
6
OUT3
20k IN3 4 NO Clamp 5 VCC
BA7622 / BA7622F
Multimedia ICs
Pin descriptions
Pin No. 1 2 3 4 5 6 Pin name GND IN1 IN2 IN3 VCC OUT3
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.
Function
7
OUT2
8
OUT1
Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 5V, and load is two system drive)
Parameter 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) Symbol VCC ICC Vom Gv Gf DG1 DP1 DG2 DP2 CT ZIN3 THD32 Min. 4.5 - 2.8 -1.2 -3 - - - - - 17 - Typ. 5.0 23.6 3.3 -0.6 0 0.4 0.4 0.7 0.7 -60 20 0.1 Max. 5.5 35.4 - 0 1.3 1.0 1.0 2.0 2.0 - 23 0.5 Unit V mA VP-P dB dB % deg % deg dB k % No signal f=1kHz, THD=1.0% f=1MHz, VIN=2.0VP-P 10MHz / 1MHz, VIN=1.0VP-P VIN=2.0VP-P, standard staircase signal VIN=2.0VP-P, standard staircase signal VIN=2.0VP-P, standard staircase signal VIN=2.0VP-P, standard staircase signal f=4.43MHz, VIN=2.0VP-P - f=1kHz, VIN=1.0VP-P Conditions -
BA7622 / BA7622F
Multimedia ICs
Input / output circuits
OUT1, 2, 3
20k 2, 3 6, 7, 8 100µA VCC
IN1, 2
VCC
IN3
VCC
20k 4
10k
100µA
Measurement circuit
Vector Scope Analyzer Audio Vector Scope Analyzer Audio Vector Scope Analyzer Audio
V ~ 1 SWD 2 3 SWE 1
V ~ 2 3 SWF 1
V ~ 2 3 VCC=5V
+ 47µF 1 75 driver 8 + 75 75 0.022µF
470µ + 75 470µ + 75
2
Clamp
75 driver
7
75
3 20k 4
Clamp
75 driver
The circuit for driving one 75 output load. The circuit for driving two 75 output loads is as.
+ 1000µ 75 75 75 75
6
470µ
75
NO Clamp
5
VCC=5V SWA 1 + 2 3 4 SWB 1 200µA + 2 3 4 ++ 1µ 1µ 1µ 600 V
VCC=5V SWC 1 200µA + 2 3 4
VCC=5V
++ 1µ 1µ 1µ 600
++ 1µ 1µ 1µ 600
50µA
~
OSC
~
SG
~
OSC
~
SG
V
~
OSC
~
SG
V
Fig.1
BA7622 / BA7622F
Multimedia ICs
Measurement conditions
Parameter
Current dissipation
Symbol ICC Vom12
IN1 SWA 3 1 3 3 1 3 3 1 3 3 1 1 3 3 3 3 3 1 3 3
IN2 SWB 3 3 1 3 3 1 3 3 1 3 3 3 1 1 3 3 3 3 1 3
IN3 SWC 3 3 3 1 3 3 1 3 3 1 3 3 3 3 1 1 4 3 3 1
OUT1 SWD × 3 × × 3 × × 3 × × × × 3 × 3 × × 3 × ×
OUT2 SWE × × 3 × × 3 × × 3 × 3 × × × × 3 × × 3 ×
OUT3 SWF × × × 3 × × 3 × × 3 × 3 × 3 × × × × × 3
Conditions -
Maximum output level
Vom22 Vom32 Gv12
1
Voltage gain
Gv22 Gv32 f12
2
Frequency characteristic
f22 f32 CT112 CT113
-
Interchannel crosstalk
CT211 CT213 CT311 CT312
-
Input resistance
ZIN3 THD12
3 4
Total-harmonic distortion
THD22 THD32
× : 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 0.5%. This output voltage at this time is the maximum output level Vom (VP-P). 2: Input a 2.0VP-P, 1MHz sine wave. The voltage gain is given by GV=20 log (VOUT / VIN). 3: Measure the input pin voltage VIN50 when a current of DC50µA is flowing into the input pin. Measure the input pin open-circuit voltage VIN0. The input impedance is given by Z=(VIN50 - VIN0) / 50×10-6[]. 4: Input a 1.0VP-P, 1kHz sine wave. Connect a distortion meter to the output and measure the total-harmonic distortion.
BA7622 / BA7622F
Multimedia ICs
Application example
VCC=5V
+ 47µF
0.022µF
75 1 75 driver 8 + 1000µF 75
VIDEO OUT1 VIDEO OUT2 Y C
Composite Video Signal
+ 1µF
2
Clamp
75 driver
7
+ 1000µF
75
Y Signal
+ 1µF
3
Clamp 20k
75 driver
6
+ 1µF
75
75 5 75
Y
C
C Signal 0.01µF
4
NO Clamp
Fig.2
Electrical characteristic curves
20
GAIN: GV (dB) GAIN: GV (dB)
0 20 40 60 80
0
20
40
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY: f (Hz)
FREQUENCY: f (Hz)
Fig. 3 Frequency characteristic
Fig. 4 Crosstalk
External dimensions (Units : mm)
BA7622F
5.0 ± 0.2
5
BA7622
9.3 ± 0.3 8
8
6.5 ± 0.3
5
6.2 ± 0.3
0.51Min.
3.2 ± 0.2 3.4 ± 0.3
1.5 ± 0.1
7.62
1
4
0.11
0.3 ± 0.1
2.54 0.5 ± 0.1 0° ~ 15°
1.27
0.4 ± 0.1
0.3Min. 0.15
DIP8
SOP8
0.15 ± 0.1
1
4
4.4 ± 0.2
Others parts begin by ba
BA-1 BA-2 BA-3 BA-4 BA-5 BA-6 BA-7 BA-8 BA-9 BA-10 BA-11 BA-12 BA-13 BA-14 BA-15 BA-16 BA-17 BA-18
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