General Description

The MAX4063 is a differential-input microphone preampli-

fier optimized for high-performance, portable applica-

tions. The device features two selectable inputs,

differential outputs, adjustable gain, an integrated low-

noise bias source, and a low-power shutdown mode.

Two input paths provide both differential and single-

ended microphone sensing. The high-noise rejection of

the differential input is ideally suited to an internal micro-

phone where system noise and long-run PC board traces

can degrade low-level signals. The single-ended input

provides a simple connection to an external microphone.

The differential and single-ended inputs have indepen-

dent, adjustable gains that are set with a single external

resistor. Differential outputs provide a full-scale signal of

dynamic range of the amplified signal. A complete shut-

down mode reduces the supply current to only 0.3µA

and disables the microphone bias for the ultimate in

power savings.

The MAX4063 operates from 2.4V to 5.5V and is specified

over the extended -40°C to +85°C operating temperature

range. The MAX4063 is available in both 16-pin TQFN

(4mm x 4mm x 0.8mm) and 14-pin TSSOP packages.

Applications

Features

o 2.4V to 5.5V Single-Supply Operation

o Differential Inputs and Outputs

o Adjustable Gain

o High 95dB PSRR

o High 79dB CMRR

o Low-Noise, Integrated Microphone Bias

o 750µA Supply Current

o 0.3µA Shutdown Current

o ±4kV ESD Protection (AUX_IN)

o THD+N: 0.05% at 1kHz

o Available in Space-Saving Packages

14-Pin TSSOP

16-Pin TQFN (4mm x 4mm x 0.8mm)

Differential Microphone Preamplifier with

Internal Bias and Complete Shutdown

________________________________________________________________

Maxim Integrated Products

1

IN-

IN+

BIAS

10

9

5

AUX_IN

12

SHDN

3

6

2.4V TO 5.5V

MAX4063

INT/AUX 2

OUT 8

OUT 4

ADJ

7

GND

11

1

14

G1 G2

14

13

12

11

10

9

8

1

2

3

4

5

6

7

G1

N.C.

AUX_IN

GND

OUT

SHDN

INT/AUX

G2

MAX4063

IN-

IN+

OUT

ADJ

BIAS

TSSOP

+

Typical Operating Circuit

Ordering Information

19-2753; Rev 1; 6/11

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.

Notebook Audio Systems

Tablet PCs

PDA Audio Systems

Signal Conditioning

PART

TEMP RANGE

PIN-PACKAGE

MAX4063ETE+

-40°C to +85°C

16 TQFN-EP*

MAX4063EUD+

-40°C to +85°C

14 TSSOP

Pin Configurations

Pin Configurations continued at end of data sheet.

*EP = Exposed pad.

+

Denotes a lead(pB)-free/RoHS-compliant package.