BA7664FV 查看數據表（PDF） - ROHM Semiconductor
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BA7664FV Datasheet PDF : 7 Pages
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Multimedia ICs
•Measurement circuit
2.1V
1
0.8V
2 SW1
1
3
1µF
1
1µF
2 SW2
2
2.5V
3
3
0.1µF
1
0.1µF SW4
2
4
3
MUTE
+
6dB
75Ω
20k
CHROMA MUTE
BA7664FV
SW16
1
A
8
2
+ 47µ
0.1µ
100µ
75
7
150
22µ
6
SW5
5
2.1V
1
2 0.8V
3
V02
V01
75
Fig.1
•Measurement conditions
Parameter
SW Conditions
Symbol
1
2
4
5
8
Circuit current
ICC
2
1
1
2
1
Max. output level
VOM
3
2
1
3
2
Voltage gain
Y→OUT
GV1
3
2
1
3
2
C→OUT
GV2
3
3
2
3
2
Frequency characteristic
GF
3
1
2
3
2
Muting attenuation
MT
1
2
1
3
2
Chroma muting attenuation
MTC
3
3
2
1
2
Input impedance
ZIN
3
1
3
3
2
Circuit current when muted
IMUTE
1
1
1
2
1
∗ The muting switching level is substituted by carrying out the above measurement at H = 2.1V, L = 0.8V.
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
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