2 Stereo PDM to I S/TDM Converter Data Sheet ADAU7112 FEATURES FUNCTIONAL BLOCK DIAGRAM 1.10V TO 1.98V 1.70V TO 3.63V 2 channels of PDM audio inputs from digital microphones 64 decimation ratio of PDM to PCM audio data 24-bit resolution to support high sound pressure level (SPL) microphones DVDD GND IOVDD 126 dB A-weighted SNR 4 kHz to 96 kHz output sampling rate PDM CLK BCLK Bit clock rates of 64, 128, 192, 256, 384, or 512 the 2 PDM DIGITAL I S/TDM output sampling rate INPUT DECIMATION OUTPUT FSYNC PORT FILTERING PORT Automatic PDM clock generation PDM DAT SDATA Automatic power-down when BCLK is removed 0.36 mA DVDD operating current at 48 kHz sampling rate ADAU7112 and 1.8 V supply CONFIG 2 Slave I S or TDM output interface Figure 1. Up to TDM-16 supported Configurable TDM slots I/O supply voltage from 1.70 V to 3.63 V DVDD core supply voltage from 1.10 V to 1.98 V 4 A typical DVDD shutdown current 9-ball, 1.26 mm 1.26 mm, 0.4 mm pitch WLCSP Power-on reset APPLICATIONS Mobile computing Portable electronics Consumer electronics Professional electronics GENERAL DESCRIPTION The ADAU7112 converts stereo pulse density modulation The ADAU7112 is specified over a commercial temperature (PDM) bit streams into one pulse code modulation (PCM) output range of 40C to +85C. The ADAU7112 is available in a stream. The source for the PDM data can be two microphones halide-free, 9-ball, 1.26 mm 1.26 mm, 0.4 mm pitch, wafer or other PDM sources. The PCM audio data is output on a serial level chip scale package (WLCSP). 2 audio interface port in either inter-IC serial (I S) or time domain multiplexed (TDM) format. Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2019 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 17232-001ADAU7112 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration and Function Descriptions ..............................7 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................8 Functional Block Diagram .............................................................. 1 Theory of Operation .........................................................................9 General Description ......................................................................... 1 Power-Up and Initialization .........................................................9 Revision History ............................................................................... 2 Clocking ..........................................................................................9 Specifications ..................................................................................... 3 Power-Down State .........................................................................9 Serial Port Timing Specifications ............................................... 4 Serial Audio Output Interface .....................................................9 PDM Input Timing Specifications ............................................. 5 Applications Information .............................................................. 13 Absolute Maximum Ratings ............................................................ 6 Outline Dimensions ....................................................................... 14 Thermal Resistance ...................................................................... 6 Ordering Guide .......................................................................... 14 ESD Caution .................................................................................. 6 REVISION HISTORY 6/2019Revision 0: Initial Version Rev. 0 Page 2 of 14