ANALOG DEVICES UG-126 Service Manual

Evaluation Board User Guide

V

DD

GND

3

5

1
2

2
1

1

2, 3, 4, 6

J1

C2

1.0µF

C1

0.1µF

BT1
BH501

OUTPUT

U1

ADMP401

08979-001

UG-126

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com

EVAL-ADMP401Z: Bottom-Ported Analog Output MEMS Microphone Evaluation Board

GENERAL DESCRIPTION

The EVAL-ADMP401Z is a simple evaluation board that allows
quick evaluation of the performance of the ADMP401 bottom­ported analog output omnidirectional microphone. The EVAL­ADMP401Z uses a 3.5 mm jack for connection to an amplifier
or a sound card input. An interconnect cable is provided with
the evaluation board.

A single CR1220 3 V Lithium battery powers the ADMP401Z.
The battery is included with the board. Note that the power is
always on when the battery is inserted. Disconnect the battery
when not using the evaluation board to extend battery life.

EVALUATION BOARD CIRCUIT

The schematic of the EVAL-ADMP401Z is shown in Figure 1.
See the ADMP401 data sheet for a complete description and
specifications of the microphone. The evaluation board includes
a bypass capacitor, C1, a dc-blocking capacitor, C2, a battery
holder, BT1, and an output jack, J1.

Figure 1. Evaluation Board Schematic

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.

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