UG-326 Datasheet, PDF (1/2 Pages) Analog Devices – EVAL-ADMP521Z-FLEX Bottom-Ported, Digital Output, MEMS Microphone Evaluation Board

Evaluation Board User Guide
UG-326
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com
EVAL-ADMP521Z-FLEX Bottom-Ported, Digital Output,
MEMS Microphone Evaluation Board
GENERAL DESCRIPTION
The EVAL-ADMP521Z-FLEX is a simple evaluation board that
allows quick evaluation of the performance of the ADMP521
MEMS microphone. The small size and low profile of the
flexible printed circuit board (PCB) enable direct placement
of the microphone into a prototype or an existing design for an
in situ evaluation. The EVAL-ADMP521Z-FLEX consists of an
ADMP521 microphone and a 0.1 μF bypass capacitor soldered
to a flexible PCB with color-coded wires attached.
Table 1. Pin Function Descriptions
Wire
Mnemonic Color
Description
DATA
Blue
PDM digital output signal.
VDD
Red
Power supply, 1.8 V to 3.3 V dc.
CLK
White Clock input, 1.0 MHz to 3.3 MHz.
GND
Black Ground.
L/R SELECT Yellow Left channel or right channel select.
DATA1 (right): L/R SELECT tied to GND.
DATA2 (left): L/R SELECT pulled to VDD.
EVALUATION BOARD CIRCUIT
Figure 2 and Figure 3 show the schematic and the layout of the
EVAL-ADMP521Z-FLEX. Consult the ADMP521 data sheet for
a complete description and specifications of the microphone in
conjunction with this evaluation board user guide.
EVALUATION BOARD PHOTO
Figure 1.
RED: V_DD
WHITE: CLK
YELLOW:
L/R SELECT
BLUE: DATA
U1
ADMP521
1 CLK
V_DD 4
2 L/R SELECT
DATA ⁵
GND
3
C1
0.1µF
BLACK: GND
Figure 2. Evaluation Board Schematic
Figure 3. Evaluation Board Layout
12.00
Figure 4. Evaluation Board Dimensions in mm (Wires Not Included)
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
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