WM8718SEDS

w DESCRIPTION The WM8718 is a high performance differential stereo DAC designed for audio applications such as DVD, home theatre systems and digital TV. The WM8718 supports PCM data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8718 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and differential stereo DAC in a small 20-lead SSOP package or 24-lead QFN package. The WM8718 includes a digitally controllable mute, an attenuate function and zero flag output for each channel. The 3-wire serial control port provides access to a wide range of features including on-chip mute, attenuation and phase reversal. The WM8718 is an ideal device to interface to AC-3™, DTS™, and MPEG audio decoders for surround sound applications, or for use in DVD players including those supporting DVD-A. WM8718 24 Bit Differential Stereo DAC with Volume Control FEATURES • • • 24 bit Stereo DAC Fully Differential Voltage Outputs Audio Performance - 111dB SNR (‘A’ weighted @ 48kHz) DAC - -100dB THD DAC Sampling Frequency: 8kHz - 192kHz 3 W ire Serial Control Interface Programmable Audio Data Interface Modes - I2S, Left, Right Justified, DSP - 16/20/24/32 bit Word Lengths Independent Digital Volume Control on Each Channel with 127.5dB Range in 0.5dB Steps Independent Zero Flag Outputs 3.0V - 5.5V Supply Operation 20-lead SSOP Package or 24-lead QFN Package • • • • • • • APPLICATIONS • • • CD, DVD, and DVD-Audio Players Home theatre systems Professional mixing desks BLOCK DIAGRAM LATCH SDIN SCLK W WM8718 CONTROL INTERFACE ZEROFR ZEROFL BCKIN LRCIN DIN AUDIO INTERFACE ATT/ MUTE DIGITAL FILTERS ATT/ MUTE SIGMA DELTA MODULATOR VOUTRP DAC VOUTRN VOUTLP DAC VOUTLN SIGMA DELTA MODULATOR VMID MCLK VREFP WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, November 2006, Rev 4.3 Copyright ©2006 Wolfson Microelectronics plc VREFN DGND AGND DVDD AVDD WM8718 TABLE OF CONTENTS Production Data DESCRIPTION ............................................................................................................1 FEATURES..................................................................................................................1 APPLICATIONS ..........................................................................................................1 BLOCK DIAGRAM ......................................................................................................1 TABLE OF CONTENTS ..............................................................................................2 PIN CONFIGURATION – 20 LEAD SSOP ..................................................................3 ORDERING INFORMATION – 20 LEAD SSOP..........................................................3 PIN CONFIGURATION – 24 LEAD QFN.....................................................................4 ORDERING INFORMATION – 24 LEAD QFN ............................................................4 PIN DESCRIPTION – 20 LEAD SSOP........................................................................5 PIN DESCRIPTION – 24 LEAD QFN ..........................................................................6 ABSOLUTE MAXIMUM RATINGS..............................................................................7 DC ELECTRICAL CHARACTERISTICS .....................................................................8 ELECTRICAL CHARACTERISTICS ...........................................................................8 TERMINOLOGY ................................................................................................................. 9 MASTER CLOCK TIMING .................................................................................................10 DIGITAL AUDIO INTERFACE TIMINGS ...........................................................................10 3-WIRE SERIAL CONTROL INTERFACE TIMING ...........................................................11 INTERNAL POWER ON RESET CIRCUIT ...............................................................12 DEVICE DESCRIPTION............................................................................................14 INTRODUCTION ...............................................................................................................14 CLOCKING SCHEMES .....................................................................................................14 DIGITAL AUDIO INTERFACE ...........................................................................................14 AUDIO DATA SAMPLING RATES.....................................................................................16 REGISTER MAP ...............................................................................................................18 DIGITAL FILTER CHARACTERISTICS.............................................................................24 DAC FILTER RESPONSES...............................................................................................24 DIGITAL DE-EMPHASIS CHARACTERISTICS ........................................................25 TYPICAL PERFORMANCE.......................................................................................26 APPLICATIONS INFORMATION ..............................................................................27 RECOMMENDED EXTERNAL COMPONENTS – 20 LEAD SSOP ...................................27 RECOMMENDED EXTERNAL COMPONENTS – 24 LEAD QFN .....................................28 RECOMMENDED EXTERNAL COMPONENTS VALUES .................................................28 RECOMMENDED ANALOGUE LOW PASS FILTER FOR PCM DATA FORMAT (OPTIONAL)......................................................................................................................29 PACKAGE DIMENSIONS – 20 LEAD SSOP............................................................30 PACKAGE DIMENSIONS – 24 LEAD QFN ..............................................................31 IMPORTANT NOTICE ...............................................................................................32 ADDRESS: ........................................................................................................................32 w PD Rev 4.3 November 2006 2 WM8718 PIN CONFIGURATION – 20 LEAD SSOP LRCIN DVDD DGND AVDD VREFP VREFN AGND VMID VOUTRP VOUTRN 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 DIN Production Data BCKIN MCLK ZEROFL ZEROFR WM8718 15 14 13 12 11 SCLK SDIN LATCH VOUTLP VOUTLN ORDERING INFORMATION – 20 LEAD SSOP DEVICE W M8718SEDS W M8718SEDS/R Note: Reel quantity = 2,000 TEMPERATURE RANGE -25 to +85oC -25 to +85oC PACKAGE 20-lead SSOP (Pb-free) 20-lead SSOP (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL1 MSL1 PEAK SOLDERING TEMPERATURE 260°C 260°C w PD Rev 4.3 November 2006 3 WM8718 PIN CONFIGURATION – 24 LEAD QFN Production Data ORDERING INFORMATION – 24 LEAD QFN DEVICE W M8718GEFL/V W M8718GEFL/RV Note: Reel quantity = 3,500 TEMPERATURE RANGE -25 to +85 C -25 to +85 C o o PACKAGE 24-lead QFN (Pb-free) 24-lead QFN (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL3 MSL3 PEAK SOLDERING TEMPERATURE 260°C 260°C w PD Rev 4.3 November 2006 4 WM8718 PIN DESCRIPTION – 20 LEAD SSOP PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME LRCIN DVDD DGND AVDD VREFP VREFN AGND VMID VOUTRP VOUTRN VOUTLN VOUTLP LATCH SDIN SCLK ZEROFR ZEROFL MCLK BCLKIN DIN TYPE Digital Input Supply Supply Supply Supply Supply Supply Analogue Output Analogue Output Analogue Output Analogue Output Analogue Output Digital Input P.U. Digital Input Digital Input P.D. Digital Output (Open drain) Digital Output (Open drain) Digital Input Digital Input Digital Input Positive Digital Supply Ground Digital Supply Positive Analogue Supply Positive DAC reference Supply Negative DAC reference Supply Ground Analogue Supply Mid Rail Decoupling Point Right Channel DAC Output Positive Right Channel DAC Output Negative Left Channel DAC Output Negative Left Channel DAC Output Positive Serial Control Load Input Serial Control Data Input Serial Control Data Input Clock Infinite ZERO Detect Flag for Right Channel Infinite ZERO Detect Flag for Left Channel Master Clock Input PCM Audio Data Bit Clock Input PCM Serial Audio Data Input DESCRIPTION PCM DAC Sample Rate Clock Input Production Data Note: Digital input pins have Schmitt trigger input buffers. Pins marked `P.U.` or `P.D.` have an internal pull-up or pull-down resistor. w PD Rev 4.3 November 2006 5 WM8718 PIN DESCRIPTION – 24 LEAD QFN 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 NAME DVDD DGND AVDD VREFP VREFN AGND VMID VOUTRP VOUTRN VOUTLN VOUTLP NC NC LATCH SDIN SCLK ZEROFR NC ZEROFL MCLK BCLKIN DIN LRCIN NC TYPE Supply Supply Supply Supply Supply Supply Analogue Output Analogue Output Analogue Output Analogue Output Analogue Output No Connect No Connect Digital Input P.U. Digital Input Digital Input P.D. Digital Output (Open drain) No Connect Digital Output (Open drain) Digital Input Digital Input Digital Input Digital Input No Connect Positive Digital Supply Ground Digital Supply Positive Analogue Supply Positive DAC reference Supply Negative DAC reference Supply Ground Analogue Supply Mid Rail Decoupling Point Right Channel DAC Output Positive Right Channel DAC Output Negative Left Channel DAC Output Negative Left Channel DAC Output Positive No Connect No Connect Serial Control Load Input Serial Control Data Input Serial Control Data Input Clock Infinite ZERO Detect Flag for Right Channel No Connect Infinite ZERO Detect Flag for Left Channel Master Clock Input PCM Audio Data Bit Clock Input PCM Serial Audio Data Input PCM DAC Sample Rate Clock Input No Connect DESCRIPTION Production Data Note: 1. Digital input pins have Schmitt trigger input buffers. Pins marked `P.U.` or `P.D.` have an internal pull-up or pull-down resistor. 2. It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB. w PD Rev 4.3 November 2006 6 WM8718 ABSOLUTE MAXIMUM RATINGS Production Data 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