General Description

ideal for portable audio devices where board space and

cost is at a premium. The device uses Maxim’s

enced output from a single supply, eliminating the need

for large DC-blocking capacitors, saving cost, board

space, and component height. A high 100dB PSRR and

low 0.0005% THD+N ensures clean, low-distortion ampli-

fication of the audio signal. Each MAX9727 amplifier can

THD+N while operating from a single +5V supply. Each

less than 0.003% THD+N while operating from a single

+3.3V supply.

A shutdown input disables the amplifiers and reduces

quiescent current consumption to less than 100nA. The

MAX9727 features Maxim’s comprehensive click-and-

pop suppression circuitry that reduces audible clicks and

pops during startup and shutdown.

The MAX9727 operates from a single 2.7V to 5.5V sup-

ply, consumes only 3mA of supply current per channel

and is specified over the -40°C to +85°C extended tem-

perature range.

Features

♦ 2.7V to 5.5V Single-Supply Operation

♦ High 100dB PSRR

♦ 109dB Signal-to-Noise Ratio (SNR)

♦ Ground-Referenced Outputs

♦ No Audible Clicks or Pops at Power-Up/Down

♦ Differential Inputs

♦ 3mA Supply Current Per Channel

♦ Unity-Gain Stable

♦ 100nA Low-Power Shutdown Mode

♦ ±8kV HBM ESD-Protected Outputs

________________________________________________________________ Maxim Integrated Products

1

MAX9727

OUTA

INA-

INA+

INB+

INB-

OUTB

OUTD

IND-

IND+

INC+

INC-

OUTC

PGND

C1N

SHDN

ON

OFF

C1P

PART

TEMP RANGE

PIN-

PACKAGE

GAIN

MAX9727EEP+

-40°C to +85°C

20 QSOP

Adjustable

Pin Configuration

Ordering Information

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

OUTA

OUTD

IND-

IND+

INC+

INC-

OUTC

TOP VIEW

MAX9727

QSOP

INA-

INA+

INB-

INB+

OUTB

SHDN

12

11

9

10

C1N

PGND

C1P

Simplified Block Diagram

XX-XXXX; Rev 0; 10/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Set-Top Boxes

Consumer and

Professional Audio

Equipment

A/V Receivers

CD and DVD Players

Soundcards

Portable Audio

Devices

Applications

+Denotes lead-free package.