19-2408; Rev 3; 4/11
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
1/MAX4062
General Description
Features
o 2.4V to 5.5V Single-Supply Operation
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.
o Adjustable Gain or Fixed-Gain Options
o High PSRR (86dB at 1kHz)
o High CMRR (70dB at 1kHz)
o Low Input-Referred Noise
o Integrated Microphone Bias
o 750µA Supply Current
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.
o 0.3µA Shutdown Current
o
4kV ESD Protection (AUX_IN)
o Rail-to-Rail Outputs
o THD+N: 0.04% at 1kHz
o Available in Space-Saving Packages
8-Pin TDFN (MAX4060/MAX4061)
8-Pin µMAX (MAX4060/MAX4061)
10-Pin µMAX (MAX4062)
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 TDFN
Typical Operating Circuit
®
(3mm x 3mm x 0.8mm) and 8-pin µMAX packages.
The MAX4062 is available in a 10-pin µMAX package.
2.4V TO 5.5V
4
Applications
USB Audio Peripherals
BIAS
Notebook Audio
Systems
V
CC
AES-42-Compliant
Microphones
Tablet PCs
MAX4060
PDA Audio Systems
Signal Conditioning
AUX_IN
8
x10
INT/AUX
1
Ordering Information
BIAS
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
PART
OUT
2
MAX4060ETA+ -40°C to +85°C
MAX4060EUA+ -40°C to +85°C
MAX4061ETA+ -40°C to +85°C
MAX4061EUA+ -40°C to +85°C
MAX4062EUB+ -40°C to +85°C
*EP = Exposed pad.
8 TDFN-EP*
8 µMAX
ABY
—
5
IN+
IN-
8 TDFN-EP*
8 µMAX
ABZ
—
x10
6
BIAS
10 µMAX
—
3
BIAS
V
BIAS
+Denotes a lead(Pb)-free/RoHS-compliant package.
GND
7
Pin Configurations and Selector Guide appear at end of
data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
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.