MAX4060 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown

19-2408; Rev 1; 1/03
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
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
(3mm x 3mm x 0.8mm) and 8-pin µMAX packages. The
MAX4062 is available in a 10-pin µMAX package.
Applications
Notebook Audio
Systems
Tablet PCs
PDA Audio Systems
USB Audio Peripherals
AES-42-Compliant
Microphones
Signal Conditioning
Ordering Information
PART
TEMP
RANGE
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 paddle.
PIN-
PACKAGE
8 Thin QFN-EP*
8 µMAX
8 Thin QFN-EP*
8 µMAX
10 µMAX
TOP
MARK
ABY
—
ABZ
—
—
Pin Configurations and Selector Guide appear at end of
data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Features
o 2.4V to 5.5V Single-Supply Operation
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
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 Thin QFN (MAX4060/MAX4061)
8-Pin µMAX (MAX4060/MAX4061)
10-Pin µMAX (MAX4062)
Typical Operating Circuit
2.4V TO 5.5V
BIAS
4
V_CC
MAX4060
8 AUX_IN _x10
INT/AUX 1
BIAS
5 _IN+
OUT 2
6 _IN-
x10
V_BIAS
BIAS
BIAS 3
GND
7
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