MAX9724B datasheet(8/19 Pages) MAXIM

Part #	MAX9724B

Description	60mW, DirectDrive, Stereo Headphone Amplifier with Low RF Susceptibility and Shutdown

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Manufacturer	MAXIM [Maxim Integrated Products]

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60mW, DirectDrive, Stereo Headphone Amplifier

with Low RF Susceptibility and Shutdown

8

_______________________________________________________________________________________

Pin Description

TQFN

UCSP

NAME

FUNCTION

1

C1

C1P

Flying Capacitor Positive Terminal. Connect a 1µF ceramic capacitor from C1P to C1N.

2

C2

PGND

Power Ground. Connect to SGND.

3

C3

C1N

Flying Capacitor Negative Terminal. Connect a 1µF ceramic capacitor from C1P to C1N.

4C4

PVSS

Charge-Pump Output. Connect to SVSS and bypass with a 1µF ceramic capacitor to PGND.

5A2

SHDN

Active-Low Shutdown Input

6

B3

INL

Left-Channel Input

7

A1

SGND

Signal Ground. Connect to PGND.

8

B2

INR

Right-Channel Input

9B4

SVSS

Amplifier Negative Supply. Connect to PVSS.

10

A3

OUTR

Right-Channel Output

11

A4

OUTL

Left-Channel Output

12

B1

VDD

Positive Power-Supply Input. Bypass with a 1µF capacitor to PGND.

EP

—

EP

Exposed Paddle. Internally connected to SVSS. Connect to SVSS or leave unconnected.

EXITING SHUTDOWN

VSHDN

5V/div

VOUT_

500mV/div

VIN_

1V/div

40

μs/div

ENTERING SHUTDOWN

VSHDN

5V/div

VOUT_

500mV/div

VIN_

1V/div

20

μs/div

Typical Operating Characteristics (continued)

(VDD = 5V, PGND = SGND = 0V, SHDN = VDD, C1 = C2 = 1µF, RL = ∞, gain = -1.5V/V (RIN = 20kΩ, RF = 30kΩ for the MAX9724A),

THD+N measurement bandwidth = 22Hz to 22kHz, both outputs driven in phase, TA = +25°C, unless otherwise noted.)

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