ADMP404ACEZ datasheet(7/12 Pages) AD

No de pièce	ADMP404ACEZ

Description	Omnidirectional Microphone with Bottom Port and Analog Output

PDF	12 Pages

Scroll/Zoom	100%

Fabricant	AD [Analog Devices]

Site Internet	http://www.analog.com

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7 / 12 page

Preliminary Technical Data

ADMP404

Rev. PrH | Page 7 of 12

APPLICATIONS INFORMATION

The ADMP404 output can be connected to a dedicated codec

microphone input (see Figure 7) or to a high input impedance

gain stage (see Figure 8). A 0.1 µF ceramic capacitor (C1) at VDD

placed close to the ADMP404 supply pins is used for testing and

is recommended to adequately decouple the microphone from

noise on the power supply. A 1 µF or larger dc-blocking tantalum

capacitor (C2) is required at the output of the microphone.

CONNECTING THE ADMP404 TO A CODEC

ADAU1761

ADMP404

MIC INPUT

1µF

0.1µF

GND

VDD

OUTPUT

Figure 7. ADMP404 Connected to the Analog Devices ADAU1761 Codec

CONNECTING THE ADMP404 TO AN OP AMP GAIN

STAGE

ADMP404

10k

Ω

GND

OUTPUT

GND

VDD

OP177

GAIN = (R2 + R3)/R3

1µF

0.1µF

Figure 8. ADMP404 Connected to the OP177 Op Amp

ADMP404ACEZ Fiches technique(PDF) 7 Page - Analog Devices