WM1824BGEDT

WM1824B w 24-bit 192kHz Stereo DAC with 2Vrms Ground Referenced Line Output DESCRIPTION FEATURES The WM1824B is a stereo DAC with integral charge pump. This provides 2Vrms line driver outputs using a single 3.3V power supply rail.  The device features ground-referenced outputs and the use of a DC servo to eliminate the need for line driving coupling capacitors and effectively eliminate power on pops and clicks. The device is controlled and configured via a hardware control interface. The device supports all common audio sampling rates between 8kHz and 192kHz using all common MCLK fs rates. The audio interface operates in slave mode. The WM1824B has a 3.3V tolerant digital interface, allowing logic up to 3.3V to be connected. The device is available in a 16-pin TSSOP package.           High performance stereo DAC with ground referenced line driver Audio Performance  106dB SNR (‘A-weighted’)  -87dB THD @ -1dBFS 120dB mute attenuation All common sample rates from 8kHz to 192kHz supported Hardware control mode I2S input data format < 1mV DC offset on Line Outputs Pop/Click suppressed Power Up/Down Sequencer AVDD, LINEVDD and DBVDD can operate at +3.3V ±10% allowing single supply 16 lead TSSOP package Operating temperature range: -40°C to 85°C APPLICATIONS  Consumer digital audio applications requiring 2Vrms output  Games Consoles  Set Top Box  A/V Receivers  DVD Players  Digital TV BLOCK DIAGRAM WOLFSON MICROELECTRONICS plc Production Data, November 2012, Rev 4.0 Copyright 2012 Wolfson Microelectronics plc WM1824B 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  RECOMMENDED OPERATING CONDITIONS ..................................................... 5  ELECTRICAL CHARACTERISTICS ..................................................................... 6  TERMINOLOGY ................................................................................................................ 6  POWER CONSUMPTION MEASUREMENTS ................................................................. 8  SIGNAL TIMING REQUIREMENTS ...................................................................... 9  SYSTEM CLOCK TIMING ................................................................................................. 9  AUDIO INTERFACE TIMING .......................................................................................... 10  POWER ON RESET CIRCUIT ........................................................................................ 11  DEVICE DESCRIPTION ...................................................................................... 13  INTRODUCTION ............................................................................................................. 13  DIGITAL AUDIO INTERFACE......................................................................................... 13  DIGITAL AUDIO DATA SAMPLING RATES .................................................................. 14  HARDWARE CONTROL INTERFACE ........................................................................... 15  DIGITAL FILTER CHARACTERISTICS .............................................................. 17  DAC FILTER RESPONSES ............................................................................................ 18  APPLICATIONS INFORMATION ........................................................................ 19  RECOMMENDED EXTERNAL COMPONENTS ............................................................ 19  RECOMMENDED ANALOGUE LOW PASS FILTER..................................................... 20  RELEVANT APPLICATION NOTES ............................................................................... 20  PACKAGE DIMENSIONS .................................................................................... 21  IMPORTANT NOTICE ......................................................................................... 22  ADDRESS ....................................................................................................................... 22  REVISION HISTORY ........................................................................................... 23  w PD, Rev 4.0, November 2012 2 WM1824B Production Data PIN CONFIGURATION 16-LEAD TSSOP (TOP VIEW) ORDERING INFORMATION TEMPERATURE RANGE PACKAGE MOISTURE SENSITIVITY LEVEL PEAK SOLDERING TEMPERATURE WM1824BGEDT −40°C to +85°C 16-lead TSSOP MSL1 260oC WM1824BGEDT/R −40°C to +85°C 16-lead TSSOP MSL1 260oC ORDER CODE (pb-free) (pb-free, tape and reel) Note: Reel quantity = 2,000 w PD, Rev 4.0, November 2012 3 WM1824B Production Data PIN DESCRIPTION PIN NO NAME TYPE DESCRIPTION 1 AGND Supply Analogue ground 2 AVDD Supply Analogue supply 3 VMID Analogue Out Analogue midrail decoupling pin 4 MUTE ¯¯¯¯¯ Digital Input 5 LRCLK Digital Input Digital audio interface left/right clock 6 DACDAT Digital Input Digital audio interface data input 7 BCLK Digital Input Digital audio interface bit clock 8 MCLK Digital Input Master clock 9 DBVDD Supply Digital buffer supply 10 LINEVDD Supply Charge pump supply 11 CPCA Analogue Out Charge pump fly back capacitor pin 12 LINEGND Supply Must be connected to AGND 13 CPCB Analogue In Charge pump fly back capacitor pin 14 CPVOUTN Analogue Out Charge pump negative rail decoupling pin 15 LINEVOUTR Analogue Out Right line output 16 LINEVOUTL Analogue Out Left line output w 0 = Mute enabled 1 = Mute disabled PD, Rev 4.0, November 2012 4 WM1824B 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