MAX4063 Datasheet | Maxim Integrated

19-2753; Rev 1; 6/11 Differential Microphone Preamplifier with Internal Bias and plete Shutdown General Description 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 lownoise bias source, and a low-power shutdown mode. Two input paths provide both differential and singleended 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 plete 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. Notebook Audio Systems Tablet PCs PDA Audio Systems Signal Conditioning Applications Pin Configurations G2 1 INT/AUX 2 SHDN 3 OUT 4 BIAS 5 VCC 6 ADJ 7 + MAX4063 14 G1 13 N.C. 12 AUX_IN 11 GND 10 IN9 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 95d B PSRR o High 79d B CMRR o Low-Noise, Integrated Microphone Bias o 750µA Supply Current o 0.3µA Shutdown Current o ±4k V ESD Protection (AUX_IN) o THD+N: 0.05% at 1k Hz o Available in Space-Saving Packages 14-Pin TSSOP 16-Pin TQFN (4mm x 4mm x 0.8mm) Ordering Information PART TEMP...