WM8761 w 24-bit 192kHz Stereo DAC DESCRIPTION FEATURES Stereo DAC The WM8761 is a high performance stereo DAC designed for audio applications such as DVD, home theatre systems, Audio Performance and digital TV. The WM8761 supports data input word - 100dB SNR (A weighted 48kHz) lengths from 16 to 24-bits and sampling rates up to 192kHz. - -90dB THD The WM8761 consists of a serial interface port, digital DAC Sampling Frequency: 8kHz 192kHz interpolation filters, multi-bit sigma delta modulators and Pin Selectable Audio Data Interface Format stereo DAC in a 14-pin SOIC package. 2 - 16 to 24-bit I S, 24-bit Right Justified or DSP The WM8761 has a hardware control interface for selection 2.7V - 5.5V Supply Operation of audio data interface format, mute and de-emphasis. The 2 14-pin SOIC Package WM8761 supports I S, right justified or DSP interfaces. Pin Compatible with WM8725 & WM8726 The WM8761 is an ideal device to interface to AC-3 , DTS , and MPEG audio decoders for surround sound APPLICATIONS applications, or for use in DVD players, including supporting the implementation of 2 channels at 192kHz for high-end DVD Players DVD-Audio applications. Home Theatre Systems Digital TV Digital Set Top Boxes BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc Production Data, October 2011, Rev 4.6 To receive regular email updates, sign up at WM8761 Production Data TABLE OF CONTENTS DESCRIPTION ............................................................................................................ 1 FEATURES ................................................................................................................. 1 APPLICATIONS .......................................................................................................... 1 BLOCK DIAGRAM ..................................................................................................... 1 TABLE OF CONTENTS .............................................................................................. 2 PIN CONFIGURATION ............................................................................................... 3 ORDERING INFORMATION ....................................................................................... 3 PIN DESCRIPTION ..................................................................................................... 4 ABSOLUTE MAXIMUM RATINGS ............................................................................. 5 DC ELECTRICAL CHARACTERISTICS .................................................................... 6 ELECTRICAL CHARACTERISTICS .......................................................................... 6 TERMINOLOGY .................................................................................................................... 7 MASTER CLOCK TIMING ..................................................................................................... 8 DIGITAL AUDIO INTERFACE ............................................................................................... 8 POWER ON RESET (POR) ................................................................................................... 9 DEVICE DESCRIPTION ........................................................................................... 11 GENERAL INTRODUCTION ............................................................................................... 11 DAC CIRCUIT DESCRIPTION ............................................................................................ 11 CLOCKING SCHEMES ....................................................................................................... 12 DIGITAL AUDIO INTERFACE ............................................................................................. 12 AUDIO DATA SAMPLING RATES ...................................................................................... 14 HARDWARE CONTROL MODES ....................................................................................... 15 DIGITAL FILTER CHARACTERISTICS .............................................................................. 17 DAC FILTER RESPONSES ................................................................................................ 17 DIGITAL DE-EMPHASIS CHARACTERISTICS ....................................................... 18 APPLICATIONS INFORMATION ............................................................................. 19 RECOMMENDED EXTERNAL COMPONENTS ................................................................. 19 RECOMMENDED EXTERNAL COMPONENTS VALUES .................................................. 19 RECOMMENDED ANALOGUE LOW PASS FILTER .......................................................... 20 PCB LAYOUT RECOMMENDATIONS ................................................................................ 20 PACKAGE DRAWING .............................................................................................. 21 IMPORTANT NOTICE .............................................................................................. 22 ADDRESS: .......................................................................................................................... 22 REVISION HISTORY ................................................................................................ 23 PD, Rev 4.6, October 2011 w 2