BA7760 Просмотр технического описания (PDF) - ROHM Semiconductor

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BA7760

Microphone Amplifier

ROHM Semiconductor 

Multimedia ICs

Output from these dual amplifiers is level-adjusted with

an attached volume control (VR) and then input to pin

7 and mixed by the mixer buffer amplifier. The ON /

OFF operation of the mixer buffer amplifier can be con-

trolled with the signal input to pin 13 (MUTE CTRL).

For DC loads, this volume control (VR) should be set

above 4.5kΩ to assure proper performance of the IC’s

internal driver.

•Application example

BA7760 / BA7760F

Mode

MUTE

MUTE

Control signal

Operation

L

Muted

H

Normal operation

10kΩ

8

10µF

5kΩ

(VR)

1µF

9

10

R6

R7

11

220Ω

47µF

2.2kΩ

12

4.7µF

13

MIX BF

+

–

–+

+–

7

6

1µF

5kΩ

(VR)

5

R4

4

220Ω

47µF

4.7µF

3

2.2kΩ

2

14

BA7760 / F

Fig. 4

1

22µF

5

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