WM8782 24-bit 192 kHz Stereo ADC DESCRIPTION FEATURES SNR 100dB (A weighted 48kHz) The WM8782 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 Master or 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 WM8782 offers Master or Slave mode clocking schemes. - Analogue: 2.7 to 5.5V A control input pin M/S is used to allow Slave mode - Digital core: 2.7V to 3.6V operation or Master mode operation. A stereo 24-bit multi- 20-lead SSOP or 20-lead TSSOP package bit sigma-delta ADC is used with 128x, 64x or 32x over- Accelerated Lifetime Screened Devices available. sampling, according to sample rate. Digital audio output word lengths from 16-24 bits and sampling rates from 8kHz APPLICATIONS to 192kHz are supported. Recordable DVD Players The device is a hardware controlled device and is supplied Personal Video Recorders in a 20-lead SSOP package. STB The device is available over a functional temperature range Studio Audio Processing Equipment of -40 C to +85 C. Automotive BLOCK DIAGRAM AINOPL WM8782 AINOPR AINL - DIGITAL ADC + FILTERS DOUT LRCLK AUDIO INTERFACE BCLK MCL K - DIGITAL AINR ADC + FILTERS COM CONTROL INTERFACE Rev 4.8 Copyright Cirrus Logic, Inc., 2003 2020 JAN 2020 WM8782 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 REQUIRMENTS .................................................................................. 8 SYSTEM CLOCK TIMING .......................................................................................................... 8 AUDIO INTERFACE TIMING MASTER MODE ...................................................................... 8 AUDIO INTERFACE TIMING SLAVE MODE .......................................................................... 9 SLAVE MODE MCLK / BCLK TIMING ..................................................................................... 10 DEVICE DESCRIPTION ............................................................................................... 11 INTRODUCTION ...................................................................................................................... 11 ADC .......................................................................................................................................... 11 ADC DIGITAL FILTER ............................................................................................................. 12 DIGITAL AUDIO INTERFACE .................................................................................................. 12 POWER-ON RESET ..................................................................................................... 16 DIGITAL FILTER CHARACTERISTICS ....................................................................... 18 ADC FILTER RESPONSE ........................................................................................................ 18 ADC HIGH-PASS FILTER ........................................................................................................ 19 APPLICATIONS INFORMATION ................................................................................. 20 RECOMMENDED EXTERNAL COMPONENTS ...................................................................... 20 RECOMMENDED EXTERNAL COMPONENTS VALUES ....................................................... 20 PACKAGE DIMENSIONS ............................................................................................. 21 IMPORTANT NOTICE .................................................................................................. 22 REVISION HISTORY .................................................................................................... 23 2 Rev 4.8