WM8521 w Stereo DAC with Integrated Output Stage for 2Vrms LINE OUT DESCRIPTION FEATURES Audio Performance The WM8521 is a 192kHz stereo DAC with an integrated output - DAC SNR 98dB (A weighted 48kHz) op-amp stage, designed to generate a 2.0Vrms output signal - THD -81dB (A weighted 48kHz) directly, so reducing external component requirements in digital DAC Sampling Frequency: 8kHz 192kHz audio applications. Pin Selectable Audio Data Interface Format 2 WM8521 comes into two variants WM8521HC and WM8521H9 - I S, 16-bit Right Justified or 16bit DSP which offers different line drive output capabilities. WM8521HC 2.0 Vrms output at 12V or 9V supply outputs 2Vrms at 12V supply, while WM8521H9 outputs 7.6V to 13.2V Analogue, 2.7V to 3.6 Digital Supply 2.0Vrms at 9V supply. WM8521HC/H9 are designed for cost 14-lead SOIC Package sensitive consumer digital audio applications requiring 2Vrms line output. APPLICATIONS A 24-bit multi-bit sigma delta DAC is used with oversampling Consumer digital audio applications requiring 2 Vrms output digital interpolation filters. Digital audio input word lengths from - DVD Players 16-32 bits and sampling rates from 8kHz to 192kHz are - Digital TV supported. - Digital Set Top Boxes 2 The audio interface supports I S, Right Justified and DSP digital - A/V Receivers audio formats. 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 PD, Rev 4.2, February 2013 w 2