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LMV1022 - PDM Output Pre-Amplifier

Datasheet Summary

Description

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.

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.

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Datasheet preview – LMV1022

Datasheet Details

Part number LMV1022
Manufacturer National Semiconductor
File Size 582.21 KB
Description PDM Output Pre-Amplifier
Datasheet download datasheet LMV1022 Datasheet
Additional preview pages of the LMV1022 datasheet.

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Full PDF Text Transcription

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LMV1022/LMV1023 PDM Output Preamp for Electret Microphones LMV1022/LMV1023 OBSOLETE July 8, 2011 PDM Output Pre-Amplifier for Electret Microphones General Description 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 consume 900µW of power during operation, offering significant power savings over an analog microphone with an external ADC. The LMV1022 outputs its data on the rising clock edge. The LMV1023 outputs its data on the falling clock edge.
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