|
|
![]()
8 A7 O1 w- z' ~. m! D0 X7 f& g* u, E9 ^& Y
Advanced Ultra High Performance Multi-bit Sigma-Delta Architecture ! w s) U8 k ?# S" H( t9 j! `4 N
- 128dB SNR (‘A’-weighted mono @ 48kHz)
" r9 }* y% ]) k- 125dB SNR (‘A’-weighted stereo @ 48kHz) 5 Q* E( z% s+ ?
- 123dB SNR (non-weighted stereo @ 48kHz) % Z! |6 u5 M) s/ N& w: a
- -100dB THD @ 48kHz
" t N# d n9 B+ ]6 p5 Y- Differential analogue voltage outputs : M2 B3 W7 T0 ^
- High tolerance to clock jitter
# Z# p3 [4 ?8 R+ y0 U$ iPCM Mode
3 w2 C1 p$ J; m q s- Sampling frequency: 32kHz to 192kHz , ?" @4 E- Z& F+ k. x& c" Q- Y
- Input data word length support: 16 to 32-bit
- x$ [7 `/ ?2 \ N3 C) \- Supports all standard audio interface formats
0 a; X6 P, [1 V3 ^. N9 e) Q* t- Selectable advanced digital filter responses / p7 A+ Y$ K/ n7 }7 s
- Includes linear/minimum phase and range of tailored characteristics ! B" v5 Q1 j/ `
- Enables low pre-ringing, minimal latency 7 f# n$ C& p" y% m3 H
- Optional interface to industry standard external filters ( c" W. E0 |: W8 O) |
- Digital volume control in 0.125dB steps with soft ramp and soft mute
0 q- r) Y6 G& o* T2 {) C- Anti-clipping mode to prevent distortion even with input signals recorded up to 0dB
1 s! Y3 V# @) t4 A) i2 D3 L/ W: n- Selectable de-emphasis support * R! o; H' b! _
- Zero Flag output
& Q/ z" P1 N5 Q9 D& b% J3 zDSD Mode 0 S0 s2 Y: n6 N5 d) z4 ~/ k% B( e
- DSD bit-stream support for SACD applications
7 f5 d" Y E& P' L5 \- Support for normal or phase modulated bit-streams : w8 V4 h# g. `0 @1 q& Y$ C
- Direct or PCM converted DSD paths (DSD Plus) , U5 ^* F) U, l
- DSD mute
* h7 r# K4 ^. _+ i m: Z/ Z* BHardware or software control modes: - J; t7 T! y/ y* W
- 2 and 3 wire serial control interface support; O0 \' v: L2 ?0 W; Y/ M* C
Pin compatible with WM8740
9 z7 {5 Z# Z+ d6 p( Q. S1 f4.5V to 5.5V analogue, 3.0V to 3.6V digital supply operation
. ~6 o; j6 B0 n# x28-lead SSOP Package
' @/ N) X+ A& y( D1 Z 描述
' o5 X W, j8 Y" d& h1 |0 C+ @- SThe 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. ) j, m$ J0 }5 @5 w& r
& N# G1 c. @9 f. J3 C0 H9 U% aThe 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.
6 ~: ?: O" B/ B, b
/ l% J5 f' s7 ]0 ?- Q4 f7 j1 UThe 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. $ c* P! T) L" e3 t, K% }( W
5 d* y% Q! v, q) W% D
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.
' S; P( n7 E! _. p" [% v- C& l8 M% p2 O: a
The WM8741 is available in a convenient 28-SSOP package, and is pin compatible with the WM8740.+ A/ ]" b/ ^" Y' `
3 E( d3 f7 h T' [* E l+ C3 r0 G[ 本帖最后由 sd-iori 于 2008-1-1 17:04 编辑 ] |
|
IP卡
狗仔卡
发表于 2008-1-1 16:48
QQ好友和群
收藏
分享
好贴
烂贴
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡
楼主