NJM2777 Просмотр технического описания (PDF) - Japan Radio Corporation

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производитель

NJM2777

Headphone Amplifier with Electronic Volume

Japan Radio Corporation  

NJM2777

I TEST CIRCUIT

TEST CIRCUIT1 (THD, GEVR, VIM, PO)

Input B

CNT B

Output B

0.47µF

1µF

VCNTB

100Ω

100µF

V+

7

6

5

4

3

2

1

N.C. Mute INb CAPb CNTb OUTb V+

[THD] BPF:400 to 30KHz

10µF [GEVR] BPF:1KHz

VOL

VOL

Bias

N.C. Vref

8

9

INa CAPa CNTa OUTa GND

10 11 12 13 14

10µF

0.47µF

1µF

Input A

100µF

VCNTA

CNT A

Output A

100Ω

[THD] BPF:400 to 30KHz

[GEVR] BPF:1KHz

Volume

Range

:

GEVR=

20

log

Vo max

Vo min

Vomin : Output voltage at VCNT=0V

Vomax : Output voltage at VCNT=3.3V

–3–

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