MAX4063_11 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Differential Microphone Preamplifier with Internal Bias and Complete Shutdown

19-2753; Rev 1; 6/11
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
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
up to 6V_P-P from a single 3V supply, optimizing the
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.
Notebook Audio Systems
Tablet PCs
PDA Audio Systems
Signal Conditioning
Applications
Pin Configurations
G2 1
INT/AUX 2
SHDN 3
OUT 4
BIAS 5
V_CC 6
ADJ 7
+
MAX4063
14 G1
13 N.C.
12 AUX_IN
11 GND
10 IN-
9 IN+
8 OUT
TSSOP
Pin Configurations continued at end of data sheet.
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)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4063ETE+
-40°C to +85°C 16 TQFN-EP*
MAX4063EUD+
-40°C to +85°C 14 TSSOP
*EP = Exposed pad.
+Denotes a lead(pB)-free/RoHS-compliant package.
Typical Operating Circuit
2.4V TO 5.5V
6
3 _SHDN ^VCC
12 _{AUX_IN}
INT/AUX ²
ADJ ⁷
MAX4063
5 _{BIAS VBIAS}
OUT 4
OUT 8
9 _IN+
10 _IN-
G1 G2
GND
14 1
11
R_G
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