WM8782SEDS/RV

w WM8782 24-Bit, 192kHz Stereo ADC DESCRIPTION FEATURES The WM8782 is a high performance, low cost stereo audio ADC designed for recordable media applications.  SNR 100dB (‘A’ weighted @ 48kHz)   THD -93dB (at –1dB) Sampling Frequency: 8 – 192kHz   Master or Slave Clocking Mode System Clock (MCLK): 128fs, 192fs, 256fs, 384fs, 512fs, 768fs Audio Data Interface Modes   16-24 bit I S, 16-24 bit Left, 16-24 bit Right Justified Supply Voltages The device offers stereo line level inputs along with two control input pins (FORMAT, IWL) to allow operation of the audio interface in three industry standard modes. An internal op-amp is integrated on the front end of the chip to accommodate analogue input signals greater than 1Vrms. The device also has a high pass filter to remove residual DC offsets. WM8782 offers Master or Slave mode clocking schemes. A control input pin M/S is used to allow Slave mode operation or Master mode operation. A stereo 24-bit multibit sigma-delta ADC is used with 128x, 64x or 32x oversampling, according to sample rate. Digital audio output word lengths from 16-24 bits and sampling rates from 8kHz to 192kHz are supported. The device is a hardware controlled device and is supplied in a 20-lead SSOP package. The device is available over a functional temperature range of -40C to +85C 2   Analogue: 2.7 to 5.5V Digital core: 2.7V to 3.6V 20-lead SSOP or 20-lead TSSOP package Accelerated Lifetime Screened Devices available. APPLICATIONS      Recordable DVD Players Personal Video Recorders STB Studio Audio Processing Equipment Automotive BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Production Data, April 2010, Rev 4.7 Copyright 2010 Wolfson Microelectronics plc WM8782 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 – 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 ................................................................................................... 11  DIGITAL AUDIO INTERFACE ........................................................................................ 12  POWER ON RESET ...................................................................................................... 15  DIGITAL FILTER CHARACTERISTICS .............................................................. 17  ADC FILTER RESPONSES ........................................................................................... 17  ADC HIGH PASS FILTER .............................................................................................. 18  APPLICATIONS INFORMATION ........................................................................ 19  RECOMMENDED EXTERNAL COMPONENTS ............................................................ 19  RECOMMENDED EXTERNAL COMPONENTS VALUES ............................................. 19  PACKAGE DIMENSIONS .................................................................................... 20  20 PIN SSOP ................................................................................................................. 20  20 PIN TSSOP ............................................................................................................... 21  IMPORTANT NOTICE ......................................................................................... 21  ADDRESS: ..................................................................................................................... 21  w PD, April 2010, Rev 4.7 2 WM8782 Production Data PIN CONFIGURATION MCLK 1 20 M/S DOUT 2 19 AINL LRCLK 3 18 AINOPL DGND 4 17 COM DVDD 5 16 AINR BCLK 6 15 AINOPR IWL 7 14 AGND FSAMPEN 8 13 AVDD FORMAT 9 12 VREFP 10 11 VREFGND VMID ORDERING INFORMATION DEVICE TEMPERATURE RANGE PACKAGE MOISTURE SENSITIVITY LEVEL PEAK SOLDERING TEMPERATURE o WM8782SEDS/V -40C to +85C 20-lead SSOP (Pb-free) MSL2 260 C WM8782SEDS/RV -40C to +85C 20-lead SSOP (Pb-free, tape and reel) MSL2 260 C o Note: Reel quantity = 2,000 w PD, April 2010, Rev 4.7 3 WM8782 PIN DESCRIPTION NAME Production Data TYPE DESCRIPTION PIN NO. 1 MCLK Digital Input 2 DOUT Digital Output Master Clock 3 LRCLK Digital Input / Output 4 DGND Supply 5 DVDD Supply 6 BCLK Digital Input / Output Audio Interface Bit Clock 7 IWL Digital Tristate Input Word Length ADC Digital Audio Data Audio Interface Left / Right Clock Digital Negative Supply Digital Positive Supply 0 = 16 bit 1 = 20 bit Z = 24 bit 8 FSAMPEN Digital Tristate Input Fast Sampling Rate Enable 0 = 48kHz 1= 96kkHz Z= 192kHz 9 FORMAT Digital Tristate Input Audio Mode Select 0 = RJ 1 = LJ Z = I2S 10 VMID Analogue Output 11 VREFGND Supply 12 VREFP Analogue Output 13 AVDD Supply Analogue Positive Supply Analogue Negative Supply and Substrate Connection 14 AGND Supply 15 AINOPR Analogue Output 16 AINR Analogue Input 17 COM Analogue Input 18 AINOPL Analogue Output 19 AINL Analogue Input 20 M/S Digital Input Mid rail Voltage Decoupling Capacitor Negative Supply and Substrate Connection Positive Reference Voltage Decoupling Pin; 10uF external decoupling Right Channel Internal Op-Amp Output Right Channel Input Common mode high impedance input should be set to midrail. Left Channel Internal Op-Amp Output Left Channel Input Interface Mode Select 0 = Slave mode (128fs, 192fs, 256fs, 384fs, 512fs, 768fs) 1 = Master mode (256fs, 128fs) (fs=word clock frequency) w PD, April 2010, Rev 4.7 4 WM8782 Production Data ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified. ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at