Analog Preamplifier for Silicon Microphone With Sensitivity Calibration The EMT6910 is a high performance Microphone Pre-Amplifier with programmable gain.The preamplifier can be one time calibrated to take care of sensor sensitivity variation and thus has a very low gain error. The amplifier has very low output noise and very low distortion. Its high PSRR of 90 dB at 217 Hz makes it amenable to integration into wireless systems. The onchip charge-pump generates a low noise and high PSRR bias for the microphone Small die size 0.5mm. x 0.7mm。

Preamp IC for microphone

Programmable Gain: -x dB~10dB(negative gain depends on MEMS system)

Low Distortion Analog output : 0.3% (600mVpp output)

Ultra High SNR

Input supply range of 1.5-3.3V

PSRR of 90dB at 217Hz for 0 dB gain

Low Power solution

Programmable Charge Pump to bias wide range kinds of MEMS microphone sensor

One time gain calibration supported by on chip calibration logic and OTP Gain error < ± 1.0 dB post calibration

Supports on the fly gain change for the preamplifier All External pads are 2KV HBM ESD compatible

RF noise suppression enhanced design

APPLICATION

MEMS microphone preamplifier professional integrated circuit (mobile phone、TWS headset、TV、 car、computer、smart tablet、smart bracelet  etc.)