INMP421BCEZ-R0 datasheet(13/21 Pages) TDK

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INMP421BCEZ-R0 Datasheet(PDF) 13 Page - TDK Electronics

Part #	INMP421BCEZ-R0

Description	Omnidirectional Microphone with Bottom Port and PDM Digital Output

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	TDK [TDK Electronics]

Direct Link	http://www.tdk.com

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13 / 21 page

INMP421

Figure 11. Stereo PDM Microphone Connection to Codec

Decouple the VDD pin of the INMP421 to GND with a 0.1 µF capacitor. Place this capacitor as close to VDD as the printed circuit

board (PCB) layout allows.

Do not use a pull-up or pull-down resistor on the PDM data signal line because the resistor can pull the signal to an incorrect state

during the period that the signal line is tristated.

CLOCK OUTPUT

CODEC

0.1µF

1.8V TO 3.3V

GND

L/R SELECT DATA

INMP421 CLK

VDD

DATA INPUT

0.1µF

1.8V TO 3.3V

GND

L/R SELECT DATA

INMP421 CLK

VDD

Page 13 of 21

Document Number: DS-INMP421-00

Revision: 1.0.

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