LMV1023 - National Semiconductor

LMV1023 PDM Output Pre-Amplifier

The LMV1022 and LMV1023 integrate a pre-amplifier and ADC that can be mounted inside an electret condenser microphone (ECM). The digital output signal is a pulse density modulation (PDM) bitstream that alows the microphone to connect directly to the DSP or baseband processor. Part of National Semiconductor’s Powerwise™ family of products, the LMV1022/LMV1023.

Features

■ Integrated 21 dB Pre-Amp and ADC for significant power and space savings
■ Integrated high-pass Filter to reduce 'Plop Noise'
■ Excellent RF immunity (e.g. buzz noise)
■ LMV1022 and LMV1023 combine to create 4-wire Stereo Solution
■ Very thin 0.35mm micro SMD packaging
■ Adhesion technology >1kg Applications
■ Digital audio subsystems and stereo arrays
■ Electret condenser microphones with all digital output
■ Portable communications and small form factor devices
■ Digital audio computing or voice security
■ Automotive or array systems
■ Headphone and headset accessories Typical Applicatio.