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WM8756

更新时间： 2024-11-22 22:41:27
品牌 Logo 应用领域
欧胜 - WOLFSON /
页数 文件大小 规格书
39页 327K
描述
192KHZ SIX CHANNEL SACD COMPATIBLE AUDIO DAC

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WM8756 数据手册

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WM8756  
192kHz, Six Channel SACD™ Compatible Audio DAC  
DESCRIPTION  
FEATURES  
•
•
•
6-Channel DAC with PCM or Bitstream (DSD) operation.  
The WM8756 is  
a high performance 6-channel DAC  
designed for audio applications such as SACD™ players,  
DVD-V and DVD-A, home audio and theatre systems. The  
device supports data input word lengths from 16 to 32-bits  
and sampling rates up to 192kHz. The WM8756 can  
implement 2 or 6 channels at 192kHz for high-end DVD-  
DSD 64x Bitstream Support for Super Audio CD™  
Independent input pins for PCM and DSD data with on-  
chip multiplexer  
•
•
•
THD –96dB, SNR 106dB (‘A’ weighted @ 48kHz)  
PCM mode Sampling Rate: 8kHz – 192kHz  
Audio, or  
6 channels at up to 192kHz for surround  
Master or slave operation with Normal or Phase  
modulation method of DSD data transfer  
applications. Additionally 64x DSD bitstream support is  
offered on all 6 channels. The WM8756 consists of a serial  
interface port, digital interpolation filters, multi-bit sigma  
delta modulators and 6 DACs in a 48-pin TQFP package.  
The WM8756 also includes a digitally controllable mute and  
attenuator function on each channel, accessible during  
PCM operation. An on-chip multiplexer selects between  
PCM or DSD audio data input pins.  
•
•
3-Wire Serial Control Interface  
Programmable PCM Audio Data Interface Modes  
−
−
I2S, Left, Right Justified or DSP  
16/20/24/32 bit Word Lengths  
•
Independent Digital Volume Control on Each Channel with  
127.5dB Range in 0.5dB Steps (in PCM mode)  
The WM8756 supports hardware or software connection  
schemes for audio DAC control. The serial control interface  
provides access to a wide range of features including on-  
chip mute, attenuation and phase reversal. Hardware pin-  
controllable operation is also available.  
•
•
3.0V – 5.5V Supply (3.3V digital / 5V analogue option)  
48-pin TQFP Package  
APPLICATIONS  
•
•
•
Super Audio CD (SACD™) Players  
Universal and Multi-Format disc players  
Home theatre systems  
The WM8756 is an ideal device for all surround sound  
applications supporting the SACD™ audio format, such as  
SACD  
players,  
multi-format  
players  
and  
home  
entertainment systems.  
BLOCK DIAGRAM  
DMCKSEL  
CSB  
SCKI  
ML/I2S MC/IWL MD/DM  
DSDB  
MODE  
MUTE  
DMSLV  
CONTROL  
INTERFACE  
PCM/DSD  
MUX  
SIGMA  
DELTA  
MODULATOR  
LOW  
PASS  
FILTER  
BCKIN  
LRCIN  
LRCIN2  
DIN0  
RIGHT  
DAC  
OUT0R  
GR0  
PCM  
DATA  
DIGITAL  
FILTERS  
SIGMA  
DELTA  
MODULATOR  
LOW  
PASS  
FILTER  
LEFT  
DAC  
DIN1  
MUX  
OUT0L  
DIN2  
PCM/DSD  
SIGMA  
DELTA  
LOW  
PASS  
FILTER  
RIGHT  
DAC  
MUX  
MUX  
OUT1R  
GR1  
MODULATOR  
AUDIO  
INTERFACE  
DIGITAL  
FILTERS  
SIGMA  
DELTA  
MODULATOR  
LOW  
PASS  
FILTER  
LEFT  
DAC  
OUT1L  
DSDCLK128  
DSDCLK64  
PCM/DSD  
MUX  
DSD0  
DSD1  
DSD2  
DSD3  
DSD4  
DSD5  
SIGMA  
DELTA  
LOW  
PASS  
FILTER  
RIGHT  
DAC  
OUT2R  
GR2  
DSD  
DATA  
MODULATOR  
DIGITAL  
FILTERS  
SIGMA  
DELTA  
MODULATOR  
LOW  
PASS  
FILTER  
LEFT  
DAC  
MUX  
OUT2L  
DVDD DGND  
AGND1 AGND2 AGND3 AVDD1 AVDD2  
Advance Information October 2001, Rev 1.3  
Copyright 2001 Wolfson Microelectronics Ltd.  
WOLFSON MICROELECTRONICS LTD  
www.wolfsonmicro.com  
1234567...39

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