PA3312

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

6 of 10

www.unisonic.com.tw

QW-R107-055.A

TYPICAL APPLICATION CIRCUIT(Cont.)

R

MUX

Volume

Control

PC-

Beep

RHPIN

RLINEIN

RIN

PC-BEEP

ROUT+

ROUT-

Volume

Control

L

MUX

SE/BEL

HP/LINE

LHPIN

LLINEIN

LIN

Volume

Control

Gain/

MUX

Control

Depop

Circuitry

GAIN0

GAIN1

Volume

Control

100KΩ

100KΩ

330µF

1KΩ

Power

Manag

ement

330µF

0.1µF

0.1µF

See Note A

To System

Control

1, 12,

13, 24

22

11

19

18

4

LOUT+

LOUT- 9

GND

SHUT

DOWN

BYPASS

16

21

1KΩ

0.47µF

10

5

6

15

17

2, 3

14

8

23

20

0.47µF

A. A 0.1-µF ceramic capacitor should be placed as close as possible to the IC. For filtering lower frequency noise

signals, a larger electrolytic capacitor of 10 µF or greater should be placed near the audio power amplifier.

0.47µF

0.47µF

0.47µF

0.47µF

0.47µF

0.47µF

Left

Positive

Differential

Input Signal

Right

Positive

Differential

Input Signal

Left

Negative

Differential

Input Signal

Right

Negative

Differential

Input Signal

PC-BEEP

Input

Signal

Typical PA3312 Application Circuit Using Differential Inputs