NJM2781
I TEST CIRCUIT
Test Circuit 1 (Voltage Gain Gv, Maximum Output Voltage VOM, Total Harmonic Distortion THD)
1µF
10µF
10µF
100Ω
1 NOISE
REG
2
STBY
3
Input
6.8kΩ
0.33µF
V+
4
IN+
GND 8
Reg
V+ 7
OUT 6
47kΩ
GND
V+
2.2µF
Output
IN- 5
4.7µF
15kΩ 9kΩ
680Ω
[THD]
BPF:400 to 22kHz
Test Circuit 2 (DC Output Voltage VO, Output Noise VNO)
1µF
10µF
10µF
100Ω
NOISE
1
REG
2
STBY
3
Input
Rg=600Ω
6.8kΩ
0.33µF
V+
4
IN+
GND 8
Reg V+ 7
OUT 6
47kΩ 15kΩ
GND
V+
2.2µF
Output
IN- 5
4.7µF
680Ω
9kΩ
[VNO]
A-Weighted
–3–