UPA2008

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 8

www.unisonic.com.tw

QW-R107-068.a



PIN CONFIGURATION

LINP

SHUTDOWN

PVDDL

LINN 1

2

3

4

5

6

7

24

23

8

9

10

11

12

22

21

20

19

18

17

16

15

14

13

LOUTP

PGNDL

PGNDL

LOUTN

PVDDL

COSC

ROSC

AGND

RINN

RINP

BYPASS

PVDDR

ROUTP

PGNDR

PGNDR

ROUTN

PVDDR

NC

VOLUME



PIN DESCRIPTION

PIN

NO.

PIN NAME

DESCRIPTION

1

LINN

Negative differential audio input for left channel

2

LINP

Positive differential audio input for left channel

3

SHUTDOWN

Places the amplifer in shutdown mode if a TTL logic low is placed on this terminal;

normal operation if a TTL logic high is placed on this terminal.

4, 9

Power supply for left channel H-bridge

5

LOUTP

Positive audio output for left channel

6, 7

PGNDL

Power ground for left channel H-bridge

8

LOUTN

Negative audio output for left channel

10

COSC

A capacitor connected to this terminal sets the oscillation frequency in conjunction with

ROSC. For proper operation, connect a 220pF capacitor from COSC to ground.

11

ROSC

A resistor connected to the ROSC terminal sets the oscillation frequency in conjunction

with COSC. For proper operation, connect a 120k Ω resistor from ROSC to ground.

12

AGND

Analog ground

13

Analog power supply

14

VOLUME

DC volume control for setting the gain on the internal amplifiers. The dc voltage range is

15

NC

No connection

16, 21

Power supply for right channel H-bridge

17

ROUTN

Negative output for right channel

18, 19

PGNDR

Power ground for right channel H-bridge

20

ROUTP

Positive output for right channel

22

BYPASS

Tap to voltage divider for internal mid-supply bias generator used for internal analog

reference.

23

RINP

Negative differential audio input for right channel

24

RINN

Positive differential audio input for right channel

Thermal Pad

Connect to analog ground and the power grounds must be soldered down in all

applications to properly secure device on the PCB.