General Description

The MAX4060/MAX4061/MAX4062 are differential-input

microphone preamplifiers optimized for notebook and

PDA audio systems. These devices feature adjustable

gain with excellent power-supply rejection and com-

mon-mode rejection ratios, making them ideal for low-

noise applications in portable audio systems.

The MAX4060/MAX4062 are capable of switching their

output between the differential input and a single-

ended auxiliary microphone amplifier input. In addition,

the MAX4060/MAX4062 have a low-noise microphone

bias generator. The differential gain of the

MAX4061/MAX4062 is set with a single resistor. The

MAX4060 has a fixed gain of 10V/V and is PC99/2001

compliant. The MAX4061 includes a complete shut-

down mode. In shutdown, the supply current is

reduced to 0.3µA and the current to the microphone

bias is cut off for ultimate power savings.

The MAX4060 operates from a 4.5V to 5.5V single sup-

ply and the MAX4061/MAX4062 operate from 2.4V to

5.5V. All devices are specified over the extended oper-

ating temperature range, -40°C to +85°C. The

MAX4060/MAX4061 are available in tiny 8-pin thin QFN

The MAX4062 is available in a 10-pin µMAX package.

Applications

Features

♦ 2.4V to 5.5V Single-Supply Operation

♦ Adjustable Gain or Fixed-Gain Options

♦ High PSRR (86dB at 1kHz)

♦ High CMRR (70dB at 1kHz)

♦ Low Input-Referred Noise

♦ Integrated Microphone Bias

♦ 750µA Supply Current

♦ 0.3µA Shutdown Current

♦ ±4kV ESD Protection (AUX_IN)

♦ Rail-to-Rail Outputs

♦ THD+N: 0.04% at 1kHz

♦ Available in Space-Saving Packages

8-Pin Thin QFN (MAX4060/MAX4061)

8-Pin µMAX (MAX4060/MAX4061)

10-Pin µMAX (MAX4062)

Differential Microphone Preamplifiers with

Internal Bias and Complete Shutdown

________________________________________________________________ Maxim Integrated Products

1

BIAS

BIAS

AUX_IN

8

IN-

IN+

6

5

4

2.4V TO 5.5V

MAX4060

INT/AUX 1

OUT 2

GND

7

BIAS

3

x10

BIAS

x10

Typical Operating Circuit

Ordering Information

19-2408; Rev 2; 5/05

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.

Pin Configurations and Selector Guide appear at end of

data sheet.

*EP = Exposed paddle.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

Notebook Audio

Systems

Tablet PCs

PDA Audio Systems

USB Audio Peripherals

AES-42-Compliant

Microphones

Signal Conditioning

PART

TEMP

RANGE

PIN-

PACKAGE

TOP

MARK

MAX4060ETA

-40°C to +85°C

8 Thin QFN-EP*

ABY

MAX4060EUA

-40°C to +85°C

8 µMAX

—

MAX4061ETA

-40°C to +85°C

8 Thin QFN-EP*

ABZ

MAX4061EUA

-40°C to +85°C

8 µMAX

—

MAX4062EUB

-40°C to +85°C

10 µMAX

—