INMP621 - Wide Dynamic Range Microphone

Description

The INMP621

is a high sound pressure level (SPL), ultra-low noise, low power, digital output, bottom ported omnidirectional MEMS microphone.

This microphone clips at 133 dB SPL, which is useful for clearly capturing audio in loud environments.

Features

High Acoustic Overload Point of 133 dB SPL.
Small, Thin 4 × 3 × 1 mm Surface-Mount Package.
Omnidirectional Response.
Very High Signal-to-Noise Ratio (SNR): 65 dBA.
Sensitivity of.
46 dBFS.
Extended Frequency Response from 45 Hz to >20 kHz.
Low Current Consumption: 1.2 mA.
Sleep Mode for Extended Battery Life: 5.5 µA.
High Power Supply Rejection (PSR):.
100 dBFS.
Fourth-Order Σ-Δ Modulator.

InvenSense

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Datasheet Details

Part number	INMP621
Manufacturer	InvenSense
File Size	451.19 KB
Description	Wide Dynamic Range Microphone
Datasheet	INMP621 Datasheet

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Full PDF Text Transcription

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INMP621 Wide Dynamic Range Microphone with PDM Digital Output GENERAL DESCRIPTION The INMP621*is a high sound pressure level (SPL), ultra-low noise, low power, digital output, bottom ported omnidirectional MEMS microphone. This microphone clips at 133 dB SPL, which is useful for clearly capturing audio in loud environments. The INMP621 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ-Δ modulator. The digital interface allows the pulse density modulated (PDM) output of two microphones to be time multiplexed on a single data line using a single clock. The INMP621 is pin compatible with the INMP421 and INMP521 microphones, providing an easy upgrade path. The INMP621 has a high SNR of 65 dBA and sensitivity of −46 dBFS.

Published: Mar 26, 2019 |