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WM8728 参数 Datasheet PDF下载

WM8728图片预览
型号: WM8728
PDF下载: 下载PDF文件 查看货源
内容描述: 24位, 192kHz的立体声DAC,具有音量控制和DSD支持 [24-bit, 192kHz Stereo DAC with Volume Control and DSD Support]
分类和应用:
文件页数/大小: 28 页 / 267 K
品牌: WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
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WM8728
24-bit, 192kHz Stereo DAC
with Volume Control and DSD Support
Product Preview, Rev 1.2, April 2001
DESCRIPTION
The WM8728 is a high performance stereo DAC designed
for audio applications such as DVD, home theatre systems,
and digital TV. The WM8728 supports PCM data input word
lengths from 16 to 32-bits and sampling rates up to 192kHz.
Alternatively the WM8728 can operate in DSD compatible
mode where a 64x bitstream is input for each channel. The
WM8728 consists of a serial interface port, digital
interpolation filters, multi-bit sigma delta modulators and
stereo DAC in a small 20-pin SSOP package. The WM8728
also includes a digitally controllable mute and attenuate
function for each channel.
The WM8728 supports a variety of connection schemes for
audio DAC control. The 2 or 3-wire MPU serial port provides
access to a wide range of features including on-chip mute,
attenuation and phase reversal. A hardware controllable
interface is also available (DSD operation is only possible in
hardware mode).
The WM8728 is an ideal device to interface to AC-3,
DTS, and MPEG audio decoders for surround sound
applications, or for use in DVD players supporting DVD-A.
FEATURES
Stereo DAC with 24 bit PCM or single bit DSD operation
Audio Performance
-
106dB SNR (‘A’ weighted @ 48kHz) DAC
-
-97dB THD
DAC Sampling Frequency: 8kHz - 192kHz
2 or 3-Wire Serial Control Interface or Hardware Control
Programmable Audio Data Interface Modes
-
I
2
S, Left, Right Justified, DSP
-
16/20/24/32 bit Word Lengths
Independent Digital Volume Control on Each Channel with
127.5dB Range in 0.5dB Steps
3.0V - 5.5V Supply Operation
20-pin SSOP Package
Exceeds Dolby Class A Performance Requirements
APPLICATIONS
DVD-Audio and DVD ‘Universal’ Players
Home theatre systems
Digital TV
Digital broadcast receivers
BLOCK DIAGRAM
MODE LATI2S SCKDSD SDIDEM MUTEB CSBIWL
ZERO
CONTROL INTERFACE
WM8728
PCM/DSD
BCKIN
LRCIN
DIN
SERIAL
INTERFACE
MUTE/
ATTEN
DIGITAL FILTERS
MUTE/
ATTEN
SIGMA
DELTA
MODULATOR
MUX
RIGHT
DAC
LOW
PASS
FILTER
VOUTR
SIGMA
DELTA
MODULATOR
MUX
LEFT
DAC
LOW
PASS
FILTER
VOUTL
VMID
MCLK
AVDD DVDD
VREFP VREFN AGND
DGND
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
www.wolfsonmicro.com
Product Preview
data sheets contain
specifications for products in the
formative phase of development. These
products may be changed or discontinued
without notice.
2001
Wolfson Microelectronics Ltd
.