192kHz DAC. WM8741 Datasheet

WM8741 DAC. Datasheet pdf. Equivalent

WM8741 Datasheet
Recommendation WM8741 Datasheet
Part WM8741
Description 24-bit 192kHz DAC
Feature WM8741; w WM8741 24-bit 192kHz DAC with Advanced Digital Filtering DESCRIPTION The WM8741 is a very high .
Manufacture Wolfson Microelectronics
Datasheet
Download WM8741 Datasheet





Wolfson Microelectronics WM8741
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WM8741
24-bit 192kHz DAC with Advanced Digital Filtering
DESCRIPTION
The WM8741 is a very high performance stereo DAC
designed for audio applications such as professional
recording systems, A/V receivers and high specification CD,
DVD and home theatre systems. The device supports PCM
data input word lengths from 16 to 32-bits and sampling
rates up to 192kHz. The WM8741 also supports DSD bit-
stream data format, in both direct DSD and PCM-converted
DSD modes.
The WM8741 includes fine resolution volume and soft mute
control, digital de-emphasis and a range of advanced digital
filter responses, followed by a digital interpolation filter,
multi-bit sigma delta modulator and stereo DAC. Wolfson’s
patented architecture optimises the linearity of the DAC and
provides maximum insensitivity to clock jitter.
The digital filters include several selectable roll-off and
performance characteristics. The user can select between
standard sharp or slow roll-off responses. In addition, the
WM8741 includes a selection of advanced digital filter
characteristics including non-half band filters and minimum
phase filters.
This flexibility provides a range of benefits, such as
significantly reduced pre-ringing and minimal group delay.
The internal digital filters can also be by-passed and the
WM8741 used with an external digital filter.
The WM8741 supports two connection schemes for audio
DAC control. The 2/3 wire serial control interface provides
access to all features. A range of features can also be
accessed by hardware control interface.
The WM8741 is available in a convenient 28-SSOP
package, and is pin compatible with the WM8740.
FEATURES
Advanced Ultra High Performance Multi-bit Sigma-Delta
Architecture
128dB SNR (‘A’-weighted mono @ 48kHz)
125dB SNR (‘A’-weighted stereo @ 48kHz)
123dB SNR (non-weighted stereo @ 48kHz)
-100dB THD @ 48kHz
Differential analogue voltage outputs
High tolerance to clock jitter
PCM Mode
Sampling frequency: 32kHz to 192kHz
Input data word length support: 16 to 32-bit
Supports all standard audio interface formats
Selectable advanced digital filter responses
Includes linear/minimum phase and range of
tailored characteristics
Enables low pre-ringing, minimal latency
Optional interface to industry standard external filters
Digital volume control in 0.125dB steps with soft ramp
and soft mute
Anti-clipping mode to prevent distortion even with input
signals recorded up to 0dB
Selectable de-emphasis support
Zero Flag output
DSD Mode
DSD bit-stream support for SACD applications
Support for normal or phase modulated bit-streams
Direct or PCM converted DSD paths (DSD Plus)
DSD mute
Hardware or software control modes:
2 and 3 wire serial control interface support
Pin compatible with WM8740
4.5V to 5.5V analogue, 3.15V to 3.6V digital supply
operation
28-lead SSOP Package
APPLICATIONS
Professional audio systems
CD, DVD, SACD audio
Home theatre systems
A/V receivers
WOLFSON MICROELECTRONICS plc
Production Data, February 2013, Rev 4.3
Copyright 2013 Wolfson Microelectronics plc



Wolfson Microelectronics WM8741
WM8741
BLOCK DIAGRAM
Production Data
BCLK/DSD64CLK
FSEL/DINR
DIN/DINL
LRCLK/DSDL
IWO/DOUT
OSR/DSDR
PCM
AUDIO
INTERFACE
DSD
PCM
ATTENUATION /
MUTE
PCM
ATTENUATION /
MUTE
CONTROL INTERFACE
PCM DIGITAL FILTERS
SIGMA DELTA
MODULATOR
SIGMA DELTA
MODULATOR
DSD TO PCM
CONVERTOR
DSD
ATTENUATION /
MUTE
WM8741
DAC
LEFT
DAC
RIGHT
VMIDL
VOUTLP
VOUTLN
VOUTRP
VOUTRN
VMIDR
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Wolfson Microelectronics WM8741
Production Data
TABLE OF CONTENTS
WM8741
DESCRIPTION....................................................................................................... 1 
FEATURES ............................................................................................................ 1 
APPLICATIONS..................................................................................................... 1 
BLOCK DIAGRAM ................................................................................................ 2 
TABLE OF CONTENTS......................................................................................... 3 
PIN CONFIGURATION .......................................................................................... 4 
ORDERING INFORMATION.................................................................................. 4 
PIN DESCRIPTION (SOFTWARE CONTROL MODE).......................................... 5 
PIN DESCRIPTION (HARDWARE CONTROL MODE)......................................... 7 
ABSOLUTE MAXIMUM RATINGS ........................................................................ 9 
THERMAL PERFORMANCE................................................................................. 9 
RECOMMENDED OPERATING CONDITIONS................................................... 10 
ELECTRICAL CHARACTERISTICS ................................................................... 10 
MASTER CLOCK TIMING............................................................................................. 12 
PCM DIGITAL AUDIO INTERFACE TIMINGS .............................................................. 12 
DSD AUDIO INTERFACE TIMINGS.............................................................................. 13 
CONTROL INTERFACE TIMING – 3-WIRE MODE ...................................................... 14 
CONTROL INTERFACE TIMING – 2-WIRE MODE ...................................................... 15 
INTERNAL POWER ON RESET CIRCUIT.................................................................... 16 
DEVICE DESCRIPTION ...................................................................................... 18 
INTRODUCTION ........................................................................................................... 18 
CLOCKING SCHEMES ................................................................................................. 18 
CONTROL INTERFACE................................................................................................ 18 
SOFTWARE CONTROL INTERFACE........................................................................... 19 
DIGITAL AUDIO INTERFACE ....................................................................................... 21 
DSD MODE ................................................................................................................... 27 
SOFTWARE CONTROL MODE .................................................................................... 28 
HARDWARE CONTROL MODE.................................................................................... 39 
OVERVIEW OF FUNCTIONS .............................................................................. 43 
REGISTER MAP .................................................................................................. 44 
DIGITAL FILTER CHARACTERISTICS .............................................................. 50 
PCM MODE FILTER CHARACTERISTICS................................................................... 50 
8FS MODE FILTER CHARACTERISTICS .................................................................... 52 
DSD PLUS MODE FILTER CHARACTERISTICS......................................................... 53 
PCM MODE FILTER RESPONSES .............................................................................. 54 
8FS MODE FILTER RESPONSES................................................................................ 59 
DSD PLUS MODE FILTER RESPONSES .................................................................... 59 
DSD DIRECT MODE FILTER RESPONSES ................................................................ 60 
DEEMPHASIS FILTER RESPONSES........................................................................... 62 
APPLICATIONS INFORMATION ........................................................................ 63 
PACKAGE DIMENSIONS.................................................................................... 64 
IMPORTANT NOTICE ......................................................................................... 65 
ADDRESS: .................................................................................................................... 65 
REVISION HISTORY ........................................................................................... 66 
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