WM8594

w DESCRIPTION The WM8594 is a high performance multi-channel audio CODEC with flexible input/output selection and digital and analogue volume control. Features include a 24-bit stereo ADC with digital gain control, two 24-bit DACs with independent digital volume control, and a range of input/output channel selection options with analogue volume control, for flexible routing within current and future audio systems. The WM8594 accepts five stereo audio inputs at line levels up to 2Vrms. One stereo input can be routed to the ADC. All inputs can be routed to the output. The WM8594 outputs three stereo audio channels at line levels up to 2Vrms, which can be selected from any of the analogue inputs and DAC outputs. Additionally, one stereo output is available with a headphone driver. The DAC channels include independent digital volume control, and all three stereo output channels include analogue volume control with soft ramp. The WM8594 supports up to 2Vrms analogue inputs, 2Vrms outputs, with sampling rates from 32kHz to 192kHz for the DACs, and 32kHz to 96kHz for the ADC. The WM8594 is ideal for audio applications requiring high performance and flexible routing options, including flat panel digital TV and DVD recorder. The device is controlled via a serial interface with support for 2-wire and 3-wire control with full readback. Control of mute, powerdown and reset can also be achieved by pin selection. The WM8594 is available in a 48-lead TQFP package. • • • • • • • • • • • • WM8594 24-bit 192kHz 2Vrms Multi-Channel CODEC FEATURES • • • • • Multi-channel CODEC with 5 stereo input selector and 3 stereo output selector 4-channel DAC, 2-channel ADC Five stereo 2Vrms stereo inputs with analogue bypass to three stereo 2Vrms outputs Stereo headphone driver Audio performance DAC: 100dB SNR typical (‘A’ weighted @ 48kHz) DAC: -90dB THD typical ADC: 100dB SNR typical (‘A’ weighted @ 48kHz) ADC: -90dB THD typical Independent sampling rates for ADC, DAC1 and DAC2 DACs sampling frequency 32kHz to 192kHz ADC sampling frequency 32kHz to 96kHz ADC digital gain control: +30dB to -97dB DAC digital volume control: +12dB to -100dB Analogue Volume control with soft ramp: +6dB to -73.5dB All volume controls include zero cross detection to prevent pops and clicks 2 and 3-wire serial control interface with readback and hardware reset, mute and powerdown pins Master or slave clocking modes Programmable format audio data interface modes I2S, LJ, RJ, DSP 3.3V / 9V analogue, 3.3V digital supply operation 48-lead TQFP package APPLICATIONS • • Digital Flat Panel TV DVD-RW WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Product Preview, January 2007, Rev 1.0 Copyright ©2007 Wolfson Microelectronics plc WM8594 BLOCK DIAGRAM Product Preview w PP Rev 1.0 January 2007 2 Product Preview WM8594 TABLE OF CONTENTS DESCRIPTION .......................................................................................................1 FEATURES.............................................................................................................1 APPLICATIONS .....................................................................................................1 BLOCK DIAGRAM .................................................................................................2 TABLE OF CONTENTS .........................................................................................3 PIN CONFIGURATION...........................................................................................4 ORDERING INFORMATION ..................................................................................4 PIN DESCRIPTION ................................................................................................5 ABSOLUTE MAXIMUM RATINGS.........................................................................6 RECOMMENDED OPERATING CONDITIONS .....................................................7 SUPPLY CURRENT CONSUMPTION ...................................................................7 ELECTRICAL CHARACTERISTICS ......................................................................7 TERMINOLOGY ............................................................................................................ 9 MASTER CLOCK TIMING ........................................................................................... 11 DIGITAL AUDIO INTERFACE TIMING – SLAVE MODE............................................. 12 DIGITAL AUDIO INTERFACE TIMING – MASTER MODE.......................................... 13 CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 14 CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 15 POWER ON RESET (POR) ........................................................................................ 16 DEVICE DESCRIPTION.......................................................................................17 INTRODUCTION ......................................................................................................... 17 CONTROL INTERFACE.............................................................................................. 17 2-WIRE (SM-BUS COMPATIBLE) SERIAL CONTROL INTERFACE MODE .............. 18 3-WIRE (SPI COMPATIBLE) SERIAL CONTROL INTERFACE MODE ...................... 20 GLOBAL ENABLE CONTROL..................................................................................... 21 DIGITAL AUDIO INTERFACE ..................................................................................... 21 DIGITAL AUDIO DATA SAMPLING RATES................................................................ 23 DIGITAL AUDIO DATA FORMATS ............................................................................. 25 DAC FEATURES......................................................................................................... 29 ADC FEATURES......................................................................................................... 32 ANALOGUE ROUTING CONTROL............................................................................. 33 POP AND CLICK PERFORMANCE ............................................................................ 44 REGISTER MAP...................................................................................................47 DIGITAL FILTER CHARACTERISTICS ...............................................................71 APPLICATIONS INFORMATION .........................................................................74 RECOMMENDED EXTERNAL COMPONENTS .......................................................... 74 RECOMMENDED ANALOGUE LOW PASS FILTER .................................................. 75 EXTENDED INPUT IMPEDANCE CONFIGURATION................................................. 75 RELEVANT APPLICATION NOTES ............................................................................ 76 PACKAGE DIMENSIONS ....................................................................................77 IMPORTANT NOTICE ..........................................................................................78 ADDRESS: .................................................................................................................. 78 w PP Rev 1.0 January 2007 3 WM8594 Product Preview PIN CONFIGURATION ORDERING INFORMATION DEVICE W M8594SEFT/V W M8594SEFT/RV Note: Reel quantity = 2,200 TEMPERATURE RANGE -25 to +85oC -25 to +85oC PACKAGE 48-lead TQFP (Pb-free) 48-lead TQFP (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL1 MSL1 PEAK SOLDERING TEMPERATURE 260˚C 260˚C w PP Rev 1.0 January 2007 4 Product Preview WM8594 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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 NAME ADCLRC ADCBCLK DOUT DACMCLK1 DACLRC1 DACBCLK1 DIN1 DACMCLK2 DACLRC2 DACBCLK2 DIN2 DVDD DGND /PWDN MUTE /RESET AVDD2 AGND2 VOUT3R VOUT3L VOUT2R VOUT2L VOUT1R VOUT1L VIN1L VIN1R VIN2L VIN2R VIN3L VIN3R VIN4L VIN4R VIN5L VIN5R ADCREFP ADCVMID ADCREFN DACREFP DACVMID DACREFN AVDD1 AGND1 MODE SDOUT /CS SCLK SDIN ADCMCLK TYPE Digital Input/Output Digital Input/Output Digital Output Digital Input Digital input Digital Input Digital Input Digital Input Digital input Digital Input Digital Input Supply Supply Digital Input Digital Input Digital Input Supply Supply Analogue Output Analogue Output Analogue Output Analogue Output Analogue Output Analogue Output Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Input Analogue Output Analogue Input Analogue Input Analogue Output Analogue Input Supply Supply Digital Input Digital Output Digital Input Digital Input Digital Input Digital Input DESCRIPTION ADC audio interface left/right clock input/output ADC audio interface bit clock input/output ADC data output DAC1 master clock DAC1 audio interface left/right clock input DAC1 audio interface bit clock input DAC 1 data input DAC2 master clock DAC2 audio interface left/right clock input DAC2 audio interface bit clock input DAC 2 data input Digital supply Digital ground Hardware standby mode Hardware DAC mute Hardware reset Analogue 9V supply Analogue ground Output selector channel 3 right output Output selector channel 3 left output Output selector channel 2 right output Output selector channel 2 left output Output selector channel 1 right output Output selector channel 1 left output Input selector channel 1 left input Input selector channel 1 right input Input selector channel 2 left input Input selector channel 2 right input Input selector channel 3 left input Input selector channel 3 right input Input selector channel 4 left input Input selector channel 4 right input Input selector channel 5 left input Input selector channel 5 right input Positive reference for ADC Midrail divider decoupling pin for ADC Ground reference for ADC Positive reference for DACs Midrail divider decoupling pin for DACs Ground reference for DACs Analogue 3.3V supply Analogue ground Software mode select (High = 3-wire, Low = 2-wire) Software mode: serial control interface data output Software mode: serial control interface chip select Software mode: serial control interface clock signal Software mode: serial control interface data signal ADC master clock input w PP Rev 1.0 January 2007 5 WM8594 Product Preview 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