标题: 不知有没有火星，32位的DAC开始多起来了，， [打印本页] 作者: sd-iori 时间: 2008-1-26 16:49 标题: 不知有没有火星，32位的DAC开始多起来了，， WM8741 ! P0 D- b# k* ^& {6 f9 V . u3 ?' E, T9 E6 S% ?4 w0 m% qHigh Performance Stereo DAC ' v9 T4 \, L! L8 R4 _( t 6 W7 f/ `1 u; }, o" k1 P* A o* qAdvanced Ultra High Performance Multi-bit Sigma-Delta Architecture 9 ?2 A! c( p% A3 M5 H7 p- I
- 128dB SNR (‘A’-weighted mono @ 48kHz) 2 f! {: V( M B; B) t0 w" K- 125dB SNR (‘A’-weighted stereo @ 48kHz) + b0 I6 t( w; f/ z# ^: {2 P/ t, S* H
- 123dB SNR (non-weighted stereo @ 48kHz) : U9 j' o0 W# y0 q: I% w1 d- -100dB THD @ 48kHz , v# F' m8 q9 S9 z6 Q- s
- Differential analogue voltage outputs : N) o5 l, i/ S O( z* s- High tolerance to clock jitter 8 x5 e8 h* ]8 b4 R; dPCM Mode 0 m9 m& ^# O1 q2 D- Sampling frequency: 32kHz to 192kHz ! v* i' r- U+ r9 s
- Input data word length support: 16 to 32-bit # \ J4 m8 B7 q; c" H' F' z& k: R
- Supports all standard audio interface formats & p. }( b' A+ R4 W* K- Selectable advanced digital filter responses % f* W- j3 R9 n
- Includes linear/minimum phase and range of tailored characteristics & h _% y" `) m/ E3 \# L9 K0 C
- Enables low pre-ringing, minimal latency + f- ^! i2 e3 K9 M W' [
- Optional interface to industry standard external filters : S; C2 B3 ~9 L6 N% i- w, K3 |- Digital volume control in 0.125dB steps with soft ramp and soft mute 4 _0 ~$ [) H) e' o/ `6 ]9 N# c
- Anti-clipping mode to prevent distortion even with input signals recorded up to 0dB & J( x5 G* B7 i- N
- Selectable de-emphasis support 7 r$ Y9 m8 J. v' Q
- Zero Flag output( n M$ f5 o4 x7 ]# w
DSD Mode ; {$ s. W3 A+ T" J- g: s
- DSD bit-stream support for SACD applications ; u3 q9 a$ Z3 K3 l, D# K- Support for normal or phase modulated bit-streams # x6 C, N6 ^ ?( L+ a6 C! K$ G2 {
- Direct or PCM converted DSD paths (DSD Plus) $ _/ R) x# Y% N* f( u) z- DSD mute 0 V5 G& I( Q7 Z9 J5 yHardware or software control modes: 1 {* [ p ?' m0 p& ^) ?7 n- 2 and 3 wire serial control interface support ( Z8 y% j9 N5 K, |* q& BPin compatible with WM8740 & Y) \: t' @$ l6 N. s% l+ X4.5V to 5.5V analogue, 3.0V to 3.6V digital supply operation% P) L; Z5 w0 ^ D f( P. S) k" a
28-lead SSOP Package作者: sd-iori 时间: 2008-1-26 16:51
AK4397 ' k6 v' } j% z, K" y
Premium 32-Bit DAC with PCM/DSD input ; ^: y" h3 ~9 U& N/ T6 i# v. C7 M7 Z4 k, m2 F+ q! B
Applications: DVD/DVD-Audio/SACD Player, Digital Mixer, $ m1 ^0 S" g% n1 SPro Audio and AV Receiver ) S$ R6 \& m# T0 W2 O; W
128x Over sampling " o0 L6 q( a+ [2 f- G. w5 LSampling Rate: 30kHz ~ 216kHz ' O( W: O* b$ b( D( P4 m6 f
32Bit 8x Digital Filter (Slow-roll-off option) 8 f6 _* m- @8 BRipple: ±0.005dB, Attenuation: 75dB 4 n* @0 \4 V# P( _0 x& e% bHigh Tolerance to Clock Jitter , R. Y* p7 f! W1 E- K& c1 t0 g% w
Low Distortion Differential Output / ]3 J/ P! S( x) ]$ d
DSD data input available 1 m3 S( n' F9 C9 S( T8 }6 E. f( TDigital De-emphasis for 32, 44.1, 48kHz sampling O/ \# N! d& {/ f7 o) K1 iSoft Mute , H+ E9 P/ E) w6 k' t
Digital Attenuator (Linear 256 steps) ; L# g: l2 k! W1 e
THD+N: -103dB ! M! Y" h/ b" }' ^! nDR, S/N: 120dB * w$ U$ l$ e# X, L! U) EI/F Format: 24/32bit MSB justified, 16/20/24/32bit LSB justified, I2S, DSD ) S' |- L$ Y2 Q' f1 EMaster Clock: Normal Speed: 256fs, 384fs, 512fs, 768fs or 1152fs 9 W" A/ W* R( A8 fDouble Speed: 128fs, 192fs, 256fs or 384fs" e' @6 ?" p+ A. Y1 w* R+ v$ V6 O5 O
Quad Speed: 128fs or 192fs; J2 n1 c% M+ Q2 O" p
DSD: 512fs or 768fs 5 W6 i5 D" K1 p( K3 K2 qPower Supply: 4.75 ~ 5.25V ' U$ I0 j/ h$ \3 Y ]6 qTTL Level Digital I/F * Z8 {! Z: `( KPackage: 44pin LQFP : ~ c( T) _. s) QEvaluation Board: AKD4397 ' e' E4 i, U4 J
/ M# r: [( P' P% Q1 l" r9 lThe AK4397 is a high performance premium 32bit DAC for the 192kHz sampling mode of DVD-Audio including a 32bit digital filter. Using AKM's multi bit architecture for its modulator the AK4397 delivers a wide dynamic range while preserving linearity for improved THD+N performance. The AK4397 has full differential SCF outputs, which remove the need for AC coupling capacitors and increase performance for systems with excessive clock jitter. The AK4397 accepts 192kHz PCM data and 1-bit DSD data, ideal for a wide range of applications including DVD-Audio and SACD. The AK4397 has a functional compatibility with the AK4393/4/5 and lower power dissipation.作者: 诸葛亮的很 时间: 2008-1-26 17:27
:wacko: DAC也有位数的？不是DSP之类的芯片支持么？作者: ace11 时间: 2008-1-27 10:42
真可惜没有相应的32bit音乐格式作者: 诸葛亮的很 时间: 2008-1-27 12:12
