WM8725 w 99dB Stereo DAC DESCRIPTION FEATURES 99dB SNR performance WM8725 is a high-performance stereo DAC designed for Stereo DAC with input sampling from 8kHz to 96kHz use in portable audio equipment, video CD players and 2 Additional mute feature similar applications. It comprises selectable normal or I S 2 Normal or I S compatible data format compatible serial data interfaces for 16 to 24-bit digital Sigma-delta design with 64x oversampling inputs, high performance digital filters, and sigma-delta System clock 256fs or 384fs output DACs, achieving an excellent 99dB signal-to-noise Supply range 3V to 5V performance. 14-lead SOIC package The device is available in a 14-lead SOIC package that offers selectable mute and de-emphasis functions using a APPLICATIONS minimum of external components. Portable audio equipment Video CD players BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc Production Data, February 2012, Rev 4.3 To receive regular email updates, sign up at WM8725 Production Data TABLE OF CONTENTS DESCRIPTION ................................................................................................................ 1 FEATURES ..................................................................................................................... 1 APPLICATIONS .............................................................................................................. 1 BLOCK DIAGRAM ......................................................................................................... 1 TABLE OF CONTENTS .................................................................................................. 2 PIN CONFIGURATION ................................................................................................... 3 ORDERING INFORMATION ........................................................................................... 3 ABSOLUTE MAXIMUM RATINGS ................................................................................. 4 RECOMMENDED OPERATING CONDITIONS .............................................................. 4 ELECTRICAL CHARACTERISTICS .............................................................................. 5 PIN DESCRIPTION ......................................................................................................... 6 INTERNAL POWER ON RESET ............................................................................................... 6 DEVICE DESCRIPTION ................................................................................................. 8 INTRODUCTION ....................................................................................................................... 8 DAC CIRCUITS ......................................................................................................................... 8 SERIAL DATA INTERFACE ...................................................................................................... 9 SYSTEM CLOCK ..................................................................................................................... 10 RECOMMENDED EXTERNAL COMPONENTS ........................................................... 11 DETAIL OF RECOMMENDED EXTERNAL COMPONENTS SHOWING THE EXTERNAL LOW PASS FILTER ................................................................................................................. 11 PCB LAYOUT .......................................................................................................................... 11 PACKAGE DIMENSIONS ............................................................................................. 12 ADDRESS: .............................................................................................................................. 13 REVISION HISTORY .................................................................................................... 14 PD, Rev 4.3, February 2012 w 2