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WM8739LEDS 参数 Datasheet PDF下载

WM8739LEDS图片预览
型号: WM8739LEDS
PDF下载: 下载PDF文件 查看货源
内容描述: 立体声音频ADC [STEREO AUDIO ADC]
分类和应用:
文件页数/大小: 35 页 / 349 K
品牌: WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
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WM8739 / WM8739L
Stereo Audio ADC
DESCRIPTION
The WM8739 is a stereo audio ADC. The WM8739 is
designed specifically for portable MP3 audio and speech
players and recorders. The WM8739 is also ideal for MD,
CD-RW machines and DAT recorders.
Stereo line-level audio inputs are provided, along with a
mute and volume function, and master or slave mode
clocking schemes. The device also has a programmable
high pass filter to remove residual DC offsets.
Stereo 24-bit multi-bit sigma delta ADCs are used with
oversampling digital interpolation and digital filters. Digital
audio output word lengths from 16-32 bits and sampling
rates from 8KHz to 96KHz are supported.
The device is controlled via a 2 or 3 wire serial interface.
The interface provides access to all features including
volume controls, mutes, de-emphasis and extensive power
management facilities. The device is available in a small 20-
pin SSOP package.
FEATURES
90dB SNR (‘A’ weighted @ 48kHz) ADC
Low Power
- 12mW all-on, 1.4mW standby (‘L’ version)
- 41mW all-on, 5.3mW standby (standard version)
Low Supply Voltages
- 1.8 – 3.6V Analogue Supply (‘L’ version)
- 2.7 – 3.6V Analogue Supply (standard version)
- 1.42 – 3.6V Digital Supply (both versions)
Input Volume and Mute Controls
ADC Sampling Frequency: 8KHz – 96KHz
Selectable ADC High Pass Filter
2 or 3-Wire MPU Serial Control Interface
Programmable Audio Data Interface Modes
- I
2
S, Left, Right Justified or DSP
- 16/20/24/32 bit Word Lengths
- Master or Slave Clocking Mode
20-Pin SSOP or 5x5mm QFN Package Options
APPLICATIONS
CD, Minidisc and DAT Recorders
General Purpose Audio Digitisation
BLOCK DIAGRAM
SDIN
CSB
MODE
SCLK
AVDD
CONTROL INTERFACE
VMID
WM8739
AGND
DIGTAL AUDIO INTERFACE
RLINEIN
VOL/
MUTE
ADC
+12 to -34.5dB,
1.5dB Steps
ADCDAT
ADCLRC
DIGITAL
FILTERS
LLINEIN
VOL/
MUTE
ADC
BCLK
+12 to -34.5dB,
1.5dB Steps
OSC
DIV2
WOLFSON MICROELECTRONICS LTD
www.wolfsonmicro.com
XTI/MCLK
XTO
DCVDD
DBVDD
DGND
Advanced Information, September 2001, Rev 2.2
Copyright
2001
Wolfson Microelectronics Ltd
.