WM8782A w 24-Bit, 192kHz Stereo ADC DESCRIPTION FEATURES SNR 100dB (A weighted 48kHz) The WM8782A is a high performance, low cost stereo audio ADC designed for recordable media applications. THD -93dB (at 1dB) Sampling Frequency: 8 192kHz The device offers stereo line level inputs along with two Slave Clocking Mode control input pins (FORMAT, IWL) to allow operation of the audio interface in three industry standard modes. An System Clock (MCLK): 128fs, 192fs, 256fs, 384fs, 512fs, internal op-amp is integrated on the front end of the chip to 768fs accommodate analogue input signals greater than 1V . rms Audio Data Interface Modes The device also has a high pass filter to remove residual 2 - 16-24 bit I S, 16-24 bit Left, 16-24 bit Right Justified DC offsets. Supply Voltages WM8782A offers a Slave mode clocking scheme. A stereo - Analogue: 2.7 to 5.5V 24-bit multi-bit sigma-delta ADC is used with 128x, 64x or - Digital core: 2.7V to 3.6V 32x over-sampling, according to sample rate. Digital audio 20-lead SSOP package output word lengths from 16-24 bits and sampling rates Accelerated Lifetime Screened Devices available. from 8kHz to 192kHz are supported. The device is a hardware controlled device and is supplied APPLICATIONS in a 20-lead SSOP. Recordable DVD Players The device is available over a functional temperature range of Personal Video Recorders -40C to +85C STB Studio Audio Processing Equipment Automotive BLOCK DIAGRAM Production Data, April 2010, Rev 4.8 WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at WM8782A 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 THERMAL PERFORMANCE ................................................................................. 5 RECOMMENDED OPERATING CONDITIONS ..................................................... 6 ELECTRICAL CHARACTERISTICS ...................................................................... 6 TERMINOLOGY ............................................................................................................. 7 SIGNAL TIMING REQUIREMENTS ....................................................................... 8 SYSTEM CLOCK TIMING .............................................................................................. 8 AUDIO INTERFACE TIMING SLAVE MODE .............................................................. 9 DEVICE DESCRIPTION ....................................................................................... 10 INTRODUCTION .......................................................................................................... 10 ADC ............................................................................................................................. 10 ADC DIGITAL FILTER ................................................................................................. 10 DIGITAL AUDIO INTERFACE ...................................................................................... 11 POWER ON RESET .................................................................................................... 14 DIGITAL FILTER CHARACTERISTICS ............................................................... 16 ADC FILTER RESPONSES ......................................................................................... 16 ADC HIGH PASS FILTER ............................................................................................ 17 APPLICATIONS INFORMATION ......................................................................... 18 RECOMMENDED EXTERNAL COMPONENTS........................................................... 18 RECOMMENDED EXTERNAL COMPONENTS VALUES ............................................ 18 PACKAGE DIMENSIONS .................................................................................... 19 IMPORTANT NOTICE.................................................................................................. 20 ADDRESS: ................................................................................................................... 20 PD, April 2010, Rev 4.8 w 2