WM8776SEFT/V

WM8776 w 24-bit, 192kHz Stereo CODEC with 5 Channel I/P Multiplexer DESCRIPTION FEATURES The WM8776 is a high performance, stereo audio CODEC with five channel input selector. The WM8776 is ideal for surround sound processing applications for home hi-fi, DVD-RW and other audio visual equipment. • Audio Performance • − 108dB SNR (‘A’ weighted @ 48kHz) DAC − 102dB SNR (‘A’ weighted @ 48kHz) ADC DAC Sampling Frequency: 32kHz – 192kHz A stereo 24-bit multi-bit sigma delta ADC is used with a five stereo channel input mixer. Each ADC channel has programmable gain control with automatic level control. Digital audio output word lengths from 16-32 bits and sampling rates from 32kHz to 96kHz are supported. A stereo 24-bit 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 DAC has an input mixer allowing an external analogue signal to be mixed with the DAC signal. There are also Headphone and line outputs, with volume controls for the headphones. The WM8776 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 or 3 wire serial interface, selected by the MODE pin, which provides access to all features including channel selection, volume controls, mutes, and de-emphasis facilities. The device is available in a 48-pin TQFP package. BLOCK DIAGRAM • • • • • • ADC Sampling Frequency: 32kHz – 96kHz Five stereo ADC inputs with analogue gain adjust from +24dB to –21dB in 0.5dB steps Programmable Limiter or Automatic Level Control (ALC) Stereo DAC with independent analogue and digital volume controls • • Stereo Headphone and Line Output 3-Wire SPI Compatible or 2-Wire Software 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 Analogue Bypass Path Feature • • Selectable AUX input to the volume controls 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation APPLICATIONS • • 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, September 2008, Rev 4.1 Copyright ©2008 Wolfson Microelectronics plc WM8776 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 ELECTRICAL CHARACTERISTICS ......................................................................6 TERMINOLOGY ............................................................................................................ 7 MASTER CLOCK TIMING......................................................................................9 DIGITAL AUDIO INTERFACE – MASTER MODE ....................................................... 10 DIGITAL AUDIO INTERFACE – SLAVE MODE .......................................................... 11 3-WIRE MPU INTERFACE TIMING ............................................................................ 12 CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 13 INTERNAL POWER ON RESET CIRCUIT ..........................................................14 DEVICE DESCRIPTION.......................................................................................16 INTRODUCTION ......................................................................................................... 16 AUDIO DATA SAMPLING RATES............................................................................... 17 ZERO DETECT ........................................................................................................... 18 POWERDOWN MODES ............................................................................................. 18 DIGITAL AUDIO INTERFACE ..................................................................................... 19 CONTROL INTERFACE OPERATION ........................................................................ 23 CONTROL INTERFACE REGISTERS ........................................................................ 25 LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ...................................................... 34 REGISTER MAP ......................................................................................................... 41 DIGITAL FILTER CHARACTERISTICS ...............................................................49 DAC FILTER RESPONSES......................................................................................... 49 ADC FILTER RESPONSES......................................................................................... 50 ADC HIGH PASS FILTER ........................................................................................... 51 DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 52 APPLICATIONS INFORMATION .........................................................................53 EXTERNAL CIRCUIT CONFIGURATION ................................................................... 53 RECOMMENDED EXTERNAL COMPONENTS ..................................................54 PACKAGE DIMENSIONS ....................................................................................56 PACKAGE DIMENSIONS ....................................................................................56 IMPORTANT NOTICE ..........................................................................................57 ADDRESS: .................................................................................................................. 57 w PD, Rev 4.1, September 2008 2 WM8776 Production Data PIN CONFIGURATION ORDERING INFORMATION DEVICE TEMPERATURE RANGE PACKAGE MOISTURE SENSITIVITY LEVEL PEAK SOLDERING TEMPERATURE WM8776SEFT/V -25 to +85oC 48-pin TQFP (Pb-free) MSL2 (drybagged) 260°C WM8776SEFT/RV -25 to +85oC 48-pin TQFP (Pb-free, tape and reel) MSL2 (drybagged) 260°C Note: Reel quantity = 2,200 w PD, Rev 4.1, September 2008 3 WM8776 Production Data PIN DESCRIPTION PIN NAME TYPE 1 AIN2L Analogue Input Channel 2 left input multiplexor virtual ground DESCRIPTION 2 AIN1R Analogue Input Channel 1 right input multiplexor virtual ground 3 AIN1L Analogue Input Channel 1 left input multiplexor virtual ground 4 DACBCLK Digital input/output 5 DACMCLK Digital input Master DAC clock; 256, 384, 512 or 768fs (fs = word clock frequency) 6 DIN Digital Input DAC data input 7 DACLRC Digital input/output DAC left/right word clock 8 ZFLAGR Open Drain output DAC Right Zero Flag output (external pull-up resistor required) 9 ZFLAGL Open Drain output DAC Left Zero Flag output (external pull-up resistor required) 10 ADCBCLK Digital input/output ADC audio interface bit clock 11 ADCMCLK Digital input 12 DOUT Digital output 13 ADCLRC Digital input/output 14 DGND Supply Digital negative supply 15 DVDD Supply Digital positive supply 16 MODE Digital input Control interface mode select 17 CE Digital input Serial interface Latch signal 18 DI Digital input Serial interface data 19 CL Digital input Serial interface clock 20 HPOUTL Analogue Output 21 HPGND Supply Headphone negative supply 22 HPVDD Supply Headphone positive supply 23 HPOUTR Analogue Output 24 NC Not bonded DAC audio interface bit clock ADC audio interface master clock ADC data output ADC left/right word clock Headphone left channel output Headphone right channel output 25 NC Not bonded 26 VOUTL Analogue output DAC channel left output 27 VOUTR Analogue output DAC channel right output 28 VMIDDAC Analogue output DAC midrail decoupling pin ; 10uF external decoupling 29 DACREFN Analogue input DAC negative reference input 30 DACREFP Analogue input DAC positive reference input 31 AUXR Analogue input DAC mixer right channel input 32 AUXL Analogue input DAC mixer left channel input 33 VMIDADC Analogue Output 34 ADCREFGND Supply 35 ADCREFP Analogue Output 36 AVDD Supply Analogue positive supply 37 AGND Supply Analogue negative supply and subVstrate connection 38 AINVGR Analogue Input 39 AINOPR Analogue Output 40 AINVGL Analogue Input 41 AINOPL Analogue Output 42 AIN5R Analogue Input Channel 5 right input multiplexor virtual ground 43 AIN5L Analogue Input Channel 5 left input multiplexor virtual ground 44 AIN4R Analogue Input Channel 4 right input multiplexor virtual ground 45 AIN4L Analogue Input Channel 4 left input multiplexor virtual ground 46 AIN3R Analogue Input Channel 3 right input multiplexor virtual ground 47 AIN3L Analogue Input Channel 3 left input multiplexor virtual ground 48 AIN2R Analogue Input Channel 2 right input multiplexor virtual ground ADC midrail divider decoupling pin; 10uF external decoupling ADC negative supply and substrate connection ADC positive reference decoupling pin; 10uF external decoupling Right channel multiplexor virtual ground Right channel multiplexor output Left channel multiplexor virtual ground Left channel multiplexor output Note : Digital input pins have Schmitt trigger input buffers. w PD, Rev 4.1, September 2008 4 WM8776 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