WM8591

w 24-bit, 192kHz Stereo CODEC DESCRIPTION The WM8591 is a high performance, stereo audio CODEC with single-ended inputs and differential outputs. It is ideal for surround sound processing applications for home hi-fi, DVDRW and other audio visual equipment. The stereo 24-bit multi-bit sigma delta ADC has programmable gain with limiting control. Digital audio output word lengths from 16-32 bits and sampling rates from 32kHz to 96kHz are supported. A stereo multi-bit sigma delta DAC is used with digital audio input word lengths from 16-32 bits and sampling rates from 32kHz to 192kHz. The WM8591 supports fully independent sample rates for the ADC and DAC. The audio data interface supports I2S, left justified, right justified and DSP formats. The device is controlled in software via a 2-wire serial interface which provides access to all features including volume controls, mutes, and de-emphasis facilities. The device is available in a 28-lead SSOP package. WM8591 FEATURES • Audio Performance − 110dB SNR (‘A’ weighted @ 48kHz) DAC − 102dB SNR (‘A’ weighted @ 48kHz) ADC DAC Sampling Frequency: 32kHz – 192kHz ADC Sampling Frequency: 32kHz – 96kHz Stereo ADC input analogue gain adjust from +24dB to –21dB in 0.5dB steps ADC digital gain from -21.5dB to -103dB in 0.5dB steps Programmable Limiter on ADC input. Stereo DAC with differential analogue line outputs. 2-wire Serial Control Interface Master or Slave Clocking Mode Programmable Audio Data Interface Modes − I2S, Left, Right Justified or DSP − 16/20/24/32 bit Word Lengths 4.5V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation 28-lead SSOP Package • • • • • • • • • • • APPLICATIONS BLOCK DIAGRAM • • Surround Sound AV Processors and Hi-Fi systems DVD-RW WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, December 2005, Rev 4.0 Copyright 2005 Wolfson Microelectronics plc WM8591 TABLE OF CONTENTS Production Data DESCRIPTION .......................................................................................................1 FEATURES.............................................................................................................1 APPLICATIONS .....................................................................................................1 BLOCK DIAGRAM .................................................................................................1 TABLE OF CONTENTS .........................................................................................2 PIN CONFIGURATION...........................................................................................3 ORDERING INFORMATION ..................................................................................3 ABSOLUTE MAXIMUM RATINGS.........................................................................5 ELECTRICAL CHARACTERISTICS ......................................................................6 TERMINOLOGY ............................................................................................................ 8 MASTER CLOCK TIMING......................................................................................9 DIGITAL AUDIO INTERFACE – MASTER MODE ......................................................... 9 DIGITAL AUDIO INTERFACE – SLAVE MODE .......................................................... 10 CONTROL INTERFACE TIMING – 2-WIRE SERIALCONTROL ................................. 12 DEVICE DESCRIPTION.......................................................................................13 INTRODUCTION ......................................................................................................... 13 AUDIO DATA SAMPLING RATES............................................................................... 13 ZERO DETECT ........................................................................................................... 15 POWERDOWN MODES ............................................................................................. 15 INTERNAL POWER ON RESET CIRCUIT.................................................................. 16 DIGITAL AUDIO INTERFACE ..................................................................................... 18 CONTROL INTERFACE OPERATION ........................................................................ 22 CONTROL INTERFACE REGISTERS ........................................................................ 23 ADC/DAC SYNCHRONIZATION ................................................................................. 32 LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ...................................................... 33 REGISTER MAP ......................................................................................................... 37 DIGITAL FILTER CHARACTERISTICS ...............................................................44 DAC FILTER RESPONSES......................................................................................... 45 ADC FILTER RESPONSES......................................................................................... 46 ADC HIGH PASS FILTER ........................................................................................... 46 DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 47 APPLICATIONS INFORMATION .........................................................................48 RECOMMENDED EXTERNAL COMPONENTS .......................................................... 48 USE OF ADC/DAC SYNCHRONIZER ......................................................................... 49 PACKAGE DIMENSIONS ....................................................................................50 IMPORTANT NOTICE ..........................................................................................51 ADDRESS: .................................................................................................................. 51 w PD Rev 4.0 December 2005 2 Production Data WM8591 PIN CONFIGURATION ORDERING INFORMATION DEVICE W M8591GEDS/V W M8591GEDS/RV Note: Reel quantity = 2,000 TEMPERATURE RANGE -25 to +85oC -25 to +85oC PACKAGE 28-lead SSOP (Pb-free) 28-lead SSOP (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL2 MSL2 PEAK SOLDERING TEMPERATURE 260°C 260°C w PD Rev 4.0 December 2005 3 WM8591 PIN DESCRIPTION PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Notes: 1. Digital input pins have Schmitt trigger input buffers. NAME DI CL ZFLAGR ZFLAGL ADCLRC ADCBCLK ADCMCLK DOUT DACLRC DACBCLK DACMCLK DIN DVDD DGND VOUTRP VOUTRN VOUTLP VOUTLN AGND REFN VMID REFP AVDD NC AINL NC AINR CE Analogue Input Digital Input Analogue Input TYPE Digital Input Digital Input Digital Output (open drain) Digital Output (open drain) Digital Input/Output Digital Input/Output Digital Input Digital Output Digital Input/Output Digital Input/Output Digital Input Digital Input Supply Supply Analogue Output Analogue Output Analogue Output Analogue Output Supply Analogue Input Analogue Output Analogue Input Supply Serial interface data Serial interface clock Right channel zero flag output (external pull-up required) Left channel zero flag output (external pull-up required) ADC left/right word clock ADC audio interface bit clock DESCRIPTION Production Data Master ADC clock; 256, 384, 512 or 768fs (fs = word clock frequency) ADC data output DAC left/right word clock DAC audio interface bit clock Master DAC clock; 256, 384, 512, 768fs or 1152fs (fs = word clock frequency) DAC data input Digital positive supply Digital negative supply DAC right channel positive output DAC right channel negative output DAC left channel positive output DAC left channel negative output Analogue negative supply and substrate connection Negative reference input Midrail divider decoupling pin; must be externally decoupled Positive reference input Analogue positive supply No Connection Left channel input No Connection Right channel input 2-wire address select w PD Rev 4.0 December 2005 4 Production Data WM8591 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