WM8725ED

w 99dB Stereo DAC DESCRIPTION W M8725 is a high-performance stereo DAC designed for use in portable audio equipment, video CD players and 2 similar applications. It comprises selectable normal or I S compatible serial data interfaces for 16 to 24-bit digital inputs, high performance digital filters, and sigma-delta output DACs, achieving an excellent 99dB signal-to-noise performance. The device is available in a 14-pin SOIC package that offers selectable mute and de-emphasis functions using a minimum of external components. WM8725 FEATURES • • • • • • • • 99dB SNR performance Stereo DAC with input sampling from 8kHz to 96kHz Additional mute feature Normal or I2S compatible data format Sigma-delta design with 64x oversampling System clock 256fs or 384fs Supply range 3V to 5V 14-pin SOIC package APPLICATIONS • • Portable audio equipment Video CD players BLOCK DIAGRAM WOLFSON MICROELECTRONICS PLC www.wolfsonmicro.com Production Data, August 2004, Rev 4.1 Copyright 2004 Wolfson Microelectronics plc. WM8725 TABLE OF CONTENTS Production Data DESCRIPTION ................................................................................................................1 FEATURES......................................................................................................................1 APPLICATIONS ..............................................................................................................1 BLOCK DIAGRAM ..........................................................................................................1 TABLE OF CONTENTS ..................................................................................................2 PIN CONFIGURATION....................................................................................................3 ORDERING INFORMATION ...........................................................................................3 ABSOLUTE MAXIMUM RATINGS..................................................................................4 RECOMMENDED OPERATING CONDITIONS ..............................................................4 ELECTRICAL CHARACTERISTICS ...............................................................................5 PIN DESCRIPTION .........................................................................................................6 DEVICE DESCRIPTION..................................................................................................7 INTRODUCTION .....................................................................................................................7 DAC CIRCUITS .......................................................................................................................7 SERIAL DATA INTERFACE ....................................................................................................8 SYSTEM CLOCK ....................................................................................................................9 RECOMMENDED EXTERNAL COMPONENTS ...........................................................10 DETAIL OF RECOMMENDED EXTERNAL COMPONENTS SHOWING THE EXTERNAL LOW PASS FILTER ..............................................................................................................10 PCB LAYOUT........................................................................................................................10 PACKAGE DIMENSIONS .............................................................................................11 IMPORTANT NOTICE ...................................................................................................12 ADDRESS: ............................................................................................................................12 w PD Rev 4.1 August 2004 2 WM8725 Production Data PIN CONFIGURATION LRCIN DIN BCKIN NC CAP VOUTR GND 1 2 3 4 5 6 7 14 13 SCKI FORMAT DEEMPH NC MUTE VOUTL VDD WM8725 12 11 10 9 8 ORDERING INFORMATION DEVICE W M8725ED W M8725ED/R W M8725GED/V W M8725GED/RV TEMPERATURE RANGE -25 C to +85 C -25oC to +85oC -25oC to +85oC -25oC to +85oC o o PACKAGE 14-pin SOIC 14-pin SOIC (tape and reel) 14-pin SOIC (lead free) 14-pin SOIC (lead free tape and reel) MOISTURE SENSITIVITY LEVEL MSL1 MSL1 MSL2 MSL2 PEAK BODY TEMPERATURE 240 C 240oC 260oC 260oC o Note: Reel quantity: 3,000 w PD Rev 4.1 August 2004 3 WM8725 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