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MAX4063：Differential Microphone Preamplifier with Internal Bias and Complete Shutdown

The MAX4063 is a differential-input microphone preamplifier optimized for high-performance, portable applications. 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 microphone 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 independent, adjustable gains that are set with a single external resistor. Differential outputs provide a full-scale signal of up to 6VP-P from a single 3V supply, optimizing the dynamic range of the amplified signal. A complete shutdown 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.

Key Features 2.4V to 5.5V Single-Supply Operation Differential Inputs and Outputs Adjustable Gain High 95dB PSRR High 79dB CMRR Low-Noise, Integrated Microphone Bias 750µA Supply Current 0.3µA Shutdown Current ±4kV ESD Protection (AUX_IN) THD+N: 0.05% at 1kHz Available in Space-Saving Packages 14-Pin TSSOP 16-Pin TQFN (4mm x 4mm x 0.8mm)

MAX4063: Typical Operating Circuit Applications/Uses Notebook Audio Systems PDA Audio Systems Signal Conditioning Tablet PCs

DataSheet

Parametrics

Design kits & evaluation modules

• MAX4063EVKIT

Quality and Environmental Data

• MAX4063.pdf

Ordering Information