WM8726GRV

w 24-bit 192kHz Stereo DAC DESCRIPTION The WM8726 is a high performance stereo DAC designed for audio applications such as DVD, home theatre systems, and digital TV. The WM8726 supports data input word lengths from 16 to 24-bits and sampling rates up to 192kHz. The WM8726 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a 14-lead SOIC package. The WM8726 has a hardware control interface for selection of audio data interface format, mute and de-emphasis. The WM8726 supports I2S, right Justified or DSP interfaces. The WM8726 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 supporting the implementation of 2 channels at 192kHz for high-end DVD-Audio applications. WM8726 FEATURES • • Stereo DAC Audio Performance 100dB SNR (‘A’ weighted @ 48kHz) -88dB THD DAC Sampling Frequency: 8kHz – 192kHz Pin Selectable Audio Data Interface Format I2S, 16-bit Right Justified or DSP 2.7V - 5.5V Supply Operation 14-lead SOIC Package Pin Compatible with WM8725 • • • • • APPLICATIONS • • • • DVD Players Home Theatre Systems Digital TV Digital Set Top Boxes BLOCK DIAGRAM FORMAT MUTE DEEMPH W WM8726 CONTROL INTERFACE MUTE BCKIN LRCIN DIN MUTE AUDIO INTERFACE DIGITAL FILTERS SIGMA DELTA MODULATOR RIGHT DAC VOUTR SIGMA DELTA MODULATOR LEFT DAC VOUTL CAP MCLK VDD GND W OLFSON MICROELECTRONICS plc To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/ Production Data, September 2005, Rev 4.1 Copyright 2005 Wolfson Microelectronics plc WM8726 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 w PD Rev 4.1 September 2005 2 WM8726 Production Data PIN CONFIGURATION LRCIN DIN BCKIN NC CAP VOUTR GND 1 2 3 4 5 6 7 14 13 12 MCLK FORMAT DEEMPH NC MUTE VOUTL VDD WM8726 11 10 9 8 ORDERING INFORMATION DEVICE W M8726GED/V W M8726GED/RV TEMPERATURE RANGE -25 to +85oC -25 to +85oC PACKAGE 14-lead SOIC (Pb-free) 14-lead SOIC (Pb-free, tape and reel) MOISTURE SENSITIVITY LEVEL MSL2 MSL2 PEAK SOLDERING TEMPERATURE 260oC 260oC Notes: Reel quantity = 3,000 w PD Rev 4.1 September 2005 3 WM8726 Production Data PIN DESCRIPTION PIN 1 2 3 4 5 6 7 8 9 10 NAME LRCIN DIN BCKIN NC CAP VOUTR GND VDD VOUTL MUTE TYPE Digital input Digital input Digital input No connect Analogue output Analogue output Supply Supply Analogue output Digital input Sample rate clock input Serial audio data input Bit clock input No internal connection Analogue internal reference Right channel DAC output Negative supply Positive supply Left channel DAC output Soft mute control, Internal pull down High Impedance = Automute High = Mute ON Low = Mute OFF No internal connection De-emphasis select, Internal pull up High = de-emphasis ON Low = de-emphasis OFF Data input format select, Internal pull up Low = 16-bit right justified or DSP ‘late’ 2 High = 16-24-bit I S or DSP ‘early’ Master clock input DESCRIPTION 11 12 NC DEEMPH No connect Digital input 13 FORMAT Digital input 14 MCLK Digital input Note: 1. Digital input pins have Schmitt trigger input buffers. w PD Rev 4.1 September 2005 4 WM8726 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