PAM8901 / PAM8908

Document number: DS36456 Rev. 2 - 2

3 of 13

www.diodes.com

October 2016

© Diodes Incorporated

PAM8901 / PAM8908

Pin Descriptions

Pin Number

Pin Name

I/O/P

Function

PAM8901

PAM8908

1

1

INL-

I

Inverting left input for differential signals.

2

2

INL+

I

Non-inverting left input for differential signals.

3

3

INR+

I

Inverting right input for differential signals.

4

4

INR-

I

Non-inverting right input for differential signals.

5

6

G0

I

Gain select bit 0

6

7

G1

I

Gain select bit 1

7

5

OUTR

O

Right headphone amplifier output. Connect to right terminal of headphone jack.

8

8

HPVSS

P

Charge pump output and negative power supply for output amplifiers; connect 1µF

capacitor to GND

9

10

PGND

P

Power Ground

10

9

CAP-

O

Charge pump negative flying cap.

11

11

CAP+

O

Charge pump positive flying cap.

12

14

PVDD

P

13

12

HPVDD

O

14

16

OUTL

O

Left headphone amplifier output. Connect to left terminal of headphone jack.

15

15

SGND

I

Amplifier reference voltage.

16

13

EN

I

Amplifier enabled. Connect to logic low to shutdown; connect to logic high to activate

Functional Block Diagram

-

+

HPVDD

HPVSS

Resistor

Array

PVDD

Supply

Control

PGND

OUTL

Short-Circuit

Protection

Thermal

Protection

OUTR

CAP+

CAP-

1uF

3 Phase

Charge Pump

*Patent Pending

On/Off

Pop Free

EN

SGND

G1

G0

INR-

INR+

INL-

INL+

Resistor

Array

Gain

Select

HPVDD

1uF

1uF

HPVSS

+

-

HPVSS

HPVDD