ADMP521

Data Sheet

Rev. A | Page 10 of 16

APPLICATIONS INFORMATION

INTERFACING WITH ANALOG DEVICES CODECS

The PDM output of the ADMP521 interfaces directly with

the digital microphone inputs on Analog Devices ADAU1361,

ADAU1761, and ADAU1781 codecs. See the connection diagram

shown in Figure 14, and refer to the AN-1003 Application Note

and the respective data sheets of the codecs for more details on

the digital microphone interface.

The CN-0078 Circuit Note describes the connection between these

codecs and a digital microphone. All configuration information

is the same for the ADMP521 as it is for the ADMP421.

SUPPORTING DOCUMENTS

For additional information, see the following.

Evaluation Board User Guides

UG-326, EVAL-ADMP521Z-FLEX: Bottom-Ported, Digital Output,

MEMS Microphone Evaluation Board

UG-335, EVAL-ADMP521Z Bottom Port Digital Output MEMS

Microphone Evaluation Board

Circuit Note

CN-0078, Digital MEMS Microphone Simple Interface to a

SigmaDSP Audio Codec

Application Notes

AN-1003, Recommendations for Mounting and Connecting

Analog Devices, Inc., Bottom-Ported MEMS Microphones

AN-1068, Reflow Soldering of the MEMS Microphone

AN-1112, Microphone Specifications Explained

AN-1124, Recommendations for Sealing Analog Devices, Inc.,

Bottom-Port MEMS Microphones from Dust and Liquid Ingress

AN-1140, Microphone Array Beamforming

AVDD

MICBIAS

ADAU1361

OR

ADAU1761

0.1µF

0.1µF

1.8V TO 3.3V

JACKDET/MICIN

GND

L/R SELECT

DATA

CLK

ADMP521

ADMP521

GND

L/R SELECT

DATA

CLK

BCLK/GPIO2

Figure 14. ADAU1361 or ADAU1761 Stereo Interface Block Diagram