WM8521CHCGED

WM8521 Stereo DAC with Integrated Output Stage for 2Vrms LINE OUT DESCRIPTION FEATURES The WM8521 is a 192kHz stereo DAC with an integrated output op-amp stage, designed to generate a 2.0Vrms output signal directly, so reducing external component requirements in digital audio applications. WM8521 comes into two variants WM8521HC and WM8521H9 which offers different line drive output capabilities. WM8521HC outputs 2Vrms at 12V supply, while WM8521H9 outputs 2.0Vrms at 9V supply. WM8521HC/H9 are designed for cost sensitive consumer digital audio applications requiring 2Vrms line output. A 24-bit multi-bit sigma delta DAC is used with oversampling digital interpolation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 192kHz are supported. 2 The audio interface supports I S, Right Justified and DSP digital audio formats. Audio Performance - DAC SNR 98dB (‘A’ weighted @ 48kHz) - THD -81dB (‘A’ weighted @ 48kHz) DAC Sampling Frequency: 8kHz – 192kHz Pin Selectable Audio Data Interface Format - I2S, 16-bit Right Justified or 16bit DSP 2.0 Vrms output at 12V or 9V supply 7.6V to 13.2V Analogue, 2.7V to 3.6 Digital Supply 14-lead SOIC Package APPLICATIONS Consumer digital audio applications requiring 2 Vrms output - DVD Players - Digital TV - Digital Set Top Boxes - A/V Receivers The devices are controlled via a hardware interface which provides access to features including de-emphasis, mute and data formats. These devices are pin equivalent and are available in a 14-lead SOIC package. BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc Production Data, February 2013, Rev 4.2 Copyright 2013 Wolfson Microelectronics plc WM8521 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 DC ELECTRICAL CHARACTERISTICS ............................................................... 6 ELECTRICAL CHARACTERISTICS ..................................................................... 6 TERMINOLOGY ............................................................................................................... 7 MASTER CLOCK TIMING................................................................................................ 8 DIGITAL AUDIO INTERFACE .......................................................................................... 8 DEVICE DESCRIPTION ........................................................................................ 9 GENERAL INTRODUCTION ............................................................................................ 9 DAC CIRCUIT DESCRIPTION ......................................................................................... 9 CLOCKING SCHEMES .................................................................................................. 10 DIGITAL AUDIO INTERFACE ........................................................................................ 10 AUDIO DATA SAMPLING RATES ................................................................................. 12 HARDWARE CONTROL MODES .................................................................................. 13 DIGITAL FILTER CHARACTERISTICS ......................................................................... 15 DAC FILTER RESPONSES ........................................................................................... 15 DIGITAL DE-EMPHASIS CHARACTERISTICS ............................................................. 16 APPLICATIONS INFORMATION ........................................................................ 17 RECOMMENDED EXTERNAL COMPONENTS ............................................................ 17 RECOMMENDED EXTERNAL COMPONENTS VALUES ............................................. 17 RECOMMENDED ANALOGUE LOW PASS FILTER .................................................... 18 PCB LAYOUT RECOMMENDATIONS .......................................................................... 18 PACKAGE DRAWING ......................................................................................... 19 IMPORTANT NOTICE ......................................................................................... 20 ADDRESS: ..................................................................................................................... 20 REVISION HISTORY ........................................................................................... 21 w PD, Rev 4.2, February 2013 2 WM8521 Production Data PIN CONFIGURATION ORDERING INFORMATION DEVICE TEMPERATURE RANGE PACKAGE MOISTURE SENSITIVITY LEVEL WM8521CHCGED -25 to +85oC 14-lead SOIC (Pb- free) MSL1 WM8521CHCGED/R -25 to +85oC 14-lead SOIC (Pb-free, tape and reel) MSL1 WM8521CH9GED o -25 to +85 C 14-lead SOIC (Pb-free) MSL1 WM8521CH9GED/R -25 to +85oC 14-lead SOIC (Pb-free, tape and reel) MSL1 PEAK SOLDERING TEMPERATURE o 260 C o 260 C o 260 C o 260 C Note: 1. Reel quantity = 3,000 2. WM8521H9: 2Vrms output at 9V supply 3. WM8521HC: 2Vrms output at 12V supply w PD, Rev 4.2, February 2013 3 WM8521 Production Data PIN DESCRIPTION PIN NAME TYPE DESCRIPTION 1 DGND Supply Digital Negative supply 2 LRCLK Digital input Sample rate clock input 3 DIN Digital input Serial audio data input 4 BCLK Digital input Bit clock input 5 MUTE Digital input Soft mute control, Internal pull down High Impedance = Automute High = Mute ON Low = Mute OFF 6 VOUTR Analogue output Right channel DAC output 7 AGND Supply Analogue Negative supply 8 CAP Analogue output Analogue internal reference 9 AVDD Supply Analogue Positive supply 10 VOUTL Analogue output Left channel DAC output 11 DEEMPH Digital input De-emphasis select, Internal pull down High = de-emphasis ON 12 FORMAT Digital input Data input format select, Internal pull up Low = de-emphasis OFF Low = 16-bit right justified or 16bit DSP ‘Mode A’ High = 16-32-bit I2S or 16bit DSP ‘Mode B’ 13 MCLK Digital input Master clock input 14 DVDD Supply Digital Positive supply Note: 1. Digital input pins have Schmitt trigger input buffers. w PD, Rev 4.2, February 2013 4 WM8521 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-020 for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at