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 and 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

o 2.7V to 5.5V Single-Supply Operation

o High 100dB PSRR

o 109dB Signal-to-Noise Ratio (SNR)

o Ground-Referenced Outputs

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

o Differential Inputs

o 3mA Supply Current Per Channel

o Unity-Gain Stable

o 100nA Low-Power Shutdown Mode

o ±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

19-3860; Rev 0; 12/05

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.

E

EV

VA

AL

LU

UA

AT

TIIO

ON

N K

KIIT

T

A

AV

VA

AIIL

LA

AB

BL

LE

E

Set-Top Boxes

Consumer and

Professional Audio

Equipment

A/V Receivers

CD and DVD Players

Soundcards

Portable Audio

Devices

Applications

+

Denotes lead-free package.