5V, Differential Input, DirectDrive, 130mW

Stereo Headphone Amplifiers with Shutdown

_______________________________________________________________________________________

7

Pin Description

Typical Operating Characteristics (continued)

EXIT SHUTDOWN TRANSIENT

MAX9722 toc31

200µs/div

SHDN

2V/div

OUT

500mV/div

SHUTDOWN TRANSIENT

MAX9722 toc32

400µs/div

SHDN

2V/div

OUT

500mV/div

POWER-UP/DOWN TRANSIENT

MAX9722 toc33

20ms/div

2V/div

OUT

5mV/div

PIN

THIN QFN

TSSOP

NAME

FUNCTION

13

Charge-Pump Power Supply. Powers charge-pump inverter, charge-pump logic, and oscillator.

Connect to positive supply (2.4V to 5.5V). Bypass with a 1µF capacitor to PGND as close to the

pin as possible.

2

4

C1P

Flying Capacitor Positive Terminal

3

5

PGND

Power Ground. Connect to ground.

4

6

C1N

Flying Capacitor Negative Terminal

57

6

8

SGND

Signal Ground. Connect to ground.

7

9

INR+

Noninverting Right-Channel Audio Input

8

10

INR-

Inverting Right-Channel Audio Input

9, 13

11, 15

Amplifier Positive Power Supply. Connect to positive supply (2.4V to 5.5V). Bypass with a 1µF

capacitor to SGND as close to the pin as possible.

10

12

OUTR

Right-Channel Output

11

13

12

14

OUTL

Left-Channel Output

14

16

INL-

Inverting Left-Channel Audio Input

15

1

INL+

Noninverting Left-Channel Audio Input

16

2

SHDN

Active-Low Shutdown Input

——

EP