WM8783GED/RV

w WM8783 Stereo Low Power 96kHz ADC DESCRIPTION FEATURES The WM8783 is a compact, low cost ADC designed for set-top boxes and DVD applications. Stereo analogue inputs accept 1Vrms line level inputs; the Hi-Fi ADCs output 24-bit stereo data on the I2S digital audio interface. • • • • • • Sample rates from 8kHz to 96kHz are supported; this is configured automatically according to the external master clock (MCLK) frequency. APPLICATIONS A power on reset (POR) circuit ensures correct start-up and shut-down. The device is held in reset when MCLK is not present, offering a low-power standby state. • • • Hi-fi audio ADC (96dB SNR - ‘A’ weighted) 2 analogue audio inputs I2S digital audio interface - sample rates 8kHz to 96kHz Automatic clocking configuration from MCLK and LRCLK Integrated voltage reference circuits 8-pin SOIC package LCD televisions Set-top boxes (STB) DVD recorders The WM8783 is supplied in an 8-pin SOIC package. BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews Production Data, August 2010, Rev 4.0 Copyright ©2010 Wolfson Microelectronics plc WM8783 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 ................................................................................................ 3 ABSOLUTE MAXIMUM RATINGS ......................................................................... 4 RECOMMENDED OPERATING CONDITIONS ..................................................... 4 THERMAL PERFORMANCE ................................................................................. 5 ELECTRICAL CHARACTERISTICS ...................................................................... 6 TERMINOLOGY ............................................................................................................. 7 SIGNAL TIMING REQUIREMENTS ....................................................................... 8 SYSTEM CLOCK TIMING .............................................................................................. 8 AUDIO INTERFACE TIMING ......................................................................................... 9 DEVICE DESCRIPTION ....................................................................................... 10 INTRODUCTION.......................................................................................................... 10 ANALOGUE-TO-DIGITAL CONVERTER (ADC) .......................................................... 10 DIGITAL AUDIO INTERFACE ...................................................................................... 10 DIGITAL FILTER CHARACTERISTICS ............................................................... 12 ADC FILTER RESPONSE............................................................................................ 12 APPLICATIONS INFORMATION ......................................................................... 14 RECOMMENDED EXTERNAL COMPONENTS........................................................... 14 AUDIO INPUT PATHS............................................................................................................................... 14 POWER SUPPLY DECOUPLING ............................................................................................................. 14 RECOMMENDED EXTERNAL COMPONENTS DIAGRAM ...................................................................... 15 PCB LAYOUT CONSIDERATIONS.............................................................................. 15 PACKAGE DIMENSIONS .................................................................................... 16 IMPORTANT NOTICE .......................................................................................... 17 ADDRESS: ................................................................................................................... 17 w PD, August 2010, Rev 4.0 2 WM8783 Production Data PIN CONFIGURATION The WM8783 is supplied in a 8-pin SOIC format. The pin configuration is illustrated below, showing the top-down view from above the chip. ORDERING INFORMATION ORDER CODE TEMPERATURE RANGE PACKAGE MOISTURE SENSITIVITY LEVEL PEAK SOLDERING TEMPERATURE WM8783GED/V -40°C to +85°C 8-pin SOIC (Pb-free) MSL3 260oC WM8783GED/RV -40°C to +85°C 8-pin SOIC (Pb-free, tape and reel) MSL3 260oC Note: Reel quantity = 3000 PIN DESCRIPTION PIN NO NAME 1 ADCDAT TYPE DESCRIPTION Digital Output ADC digital audio data Master clock 2 MCLK Digital Input 3 LRCLK Digital Input Audio interface left / right clock 4 AGND Supply Ground 5 VMIDC Analogue Output Midrail voltage decoupling capacitor 6 IN1R Analogue Input Right channel analogue input 7 IN1L Analogue Input Left channel analogue input 8 AVDD Supply Positive supply w PD, August 2010, Rev 4.0 3 WM8783 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