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Número de pieza | BA7664FV | |
Descripción | 75 driver with Y / C MIX circuit | |
Fabricantes | ROHM Semiconductor | |
Logotipo | ||
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75Ω driver with Y / C MIX circuit
BA7664FV
The BA7664FV is a 75Ω driver with a 6dB amplifier and a Y / C MIX circuit. The 75Ω driver is capable of driving a
load sufficient for two circuits, as well as being equipped with a sag correction function which reduces the capaci-
tance of the output coupling capacitor. The IC comes in the compact 8-pin SSOP-B package. The composite Y sig-
nal input pin is sync chip clamped input, while the chrominance input pin is bias input. An internal power-saving cir-
cuit is also included which provides an output muting function and output pin shorting protection.
•Applications
Video cameras, electronic cameras and others
•Features
1) The compact 8-pin SSOP-B package is used.
2) Operates at a low power consumption (60mW Typ.).
3) Internal Y / C MIX circuit.
4) Internal output muting circuit.
5) Internal power-saving circuit.
6) Internal output protection circuit.
7) Internal sag correction function makes it possible to
reduce the capacitance of the output coupling
capacitor.
8) A load sufficient for two circuits can be driven.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Power supply voltage
VCC
8
Power dissipation
Pd
350
Operating temperature
Topr
– 25 ~ + 75
Storage temperature
Tstg
– 55 ~ + 125
∗ Reduced by 3.5mW for each increase in Ta of 1°C over 25°C
Unit
V
mW
°C
°C
•Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min.
Operating power supply voltage
∗Not designed for radiation resistance.
VCC 4.5
Typ.
5.0
Max.
5.5
Unit
V
1
1 page Multimedia ICs
•Measurement circuit
2.1V
0.8V
1
2 SW1
1µF
1µF
3
1
2 SW2
1
2
2.5V
3
3
0.1µF
0.1µF
1
SW4
2
3V
4
MUTE
+ 6dB 75Ω
20k
CHROMA MUTE
BA7664FV
SW16
1A
8
2
+ 47µ
0.1µ
100µ
7
75
150
22µ
6
SW5
5
2.1V
1
2 0.8V
3
V02
V01
75
Fig.1
•Measurement conditions
Parameter
Symbol
1
SW Conditions
245
Circuit current
ICC 2 1 1 2
Max. output level
VOM 3 2 1 3
Voltage gain
Y→OUT
GV1 3 2 1 3
C→OUT GV2 3 3 2 3
Frequency characteristic
GF 3 1 2 3
Muting attenuation
MT 1 2 1 3
Chroma muting attenuation
MTC 3 3 2 1
Input impedance
ZIN 3 1 3 3
Circuit current when muted
IMUTE 1 1 1
∗ The muting switching level is substituted by carrying out the above measurement at H = 2.1V, L = 0.8V.
2
8
1
2
2
2
2
2
2
2
1
Measurement method
∗1 Measure the circuit current when no signal is present.
∗2 Apply a sine wave of f = 1kHz to the input, and adjust the input level so that the output distortion is 1%.
At this time, set the output voltage to the maximum output level of VOM [VP-P].
∗3 Measure the output VO [VP-P] with a sine wave of f = 4.43MHz, 1VP-P applied to the input.
Voltage gain GV is: GV = 20 Log (VO / VIN) [dB]
∗4 Measure the outputs VO7 and VO1 [VP-P] each with sine waves of f = 7MHz, 1VP-P and f = 1MHz, 1VP-P applied to the input.
Voltage frequency GF is: GF = 20 Log (VO7 / VO1) [dB]
∗5 Measure the output VO [VP-P] with a sine wave of f = 4.43MHz, 1VP-P applied to the input.
The muting attenuation MT is: MT = 20 Log (VO / VIN) [dB]
∗6 Measure the input voltage VINSO [V] and the open voltage of the input VINO [V] when 50µA is introduced.
The input impedance ZIN is: ZIN = |VINSO – VINO| / 50 × 1000 [kΩ]
∗7 Measure the circuit current when MUTEA (pin 1) is HIGH.
Measurement
method
∗1
∗2
∗3
∗3
∗4
∗5
∗5
∗6
∗7
5
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet BA7664FV.PDF ] |
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BA7664FV | 75 driver with Y / C MIX circuit | ROHM Semiconductor |
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