WM8728SEDS/R, WM8729ED, WM8731
MFG:WOLFSON
Table of contents:
Part Number: WM8728SEDS/R
MFG: WOLFSON
WM8728SEDS/R Supplier
WM8728SEDS/R
Qty: 8000 Note: new in stock
Mentor International Electronic Co.,Ltd., 
Contact: Mr.TOPHYYING 
Tel: 086-755-21983036
Adddate: 2010-03-14
WM8728SEDS/R
MFG: WOLFSON Package Cooled: SOP-20 D/C: 06+ Qty: 4000
Contact: Ms.Louise Huang
Tel: 86-755-8279-9256
Adddate: 2010-03-14
WM8728SEDS/R
MFG: 600
ZHW HIGH-TECH (HK) Company Limited 
Contact: Mr.Jack Wei
Tel: 0086-0755-84157334
Adddate: 2010-03-14
WM8728SEDS/R
MFG: WM Package Cooled: SSOP D/C: 05+PB Qty: 1012 Note:
WinDigital Technology Development Limited
Contact: Mr.Eric
Tel: 0086-0755-83235840
Adddate: 2010-03-14
WM8728SEDS/R
MFG: WOLFSON Package Cooled: SSOP/20 D/C: 06+ Qty: 1296 Note: 盘装
Shen Zhen Yuet Xin Peng Electronic Co.,
Contact: Ms.yilin
Tel: 86-755-83743222
Adddate: 2010-03-14
WM8728SEDS/R
MFG: WM D/C: 08+ Qty: 1920
Showtech International (hk) CO.,LTD
Contact: Ms.AnnaHuang
Tel: 86-0755-82709648
Adddate: 2010-03-14
WM8728SEDS/R
MFG: WM Package Cooled: SSOP20 D/C: 05+PB Qty: 1920
Contact: Mr.Alex
Tel: 86-755-81284360
Adddate: 2010-03-14
WM8728SEDS/R
Package Cooled: SSOP D/C: 08+ Qty: 2000
Action Dynamic Tech(HK) Trading Co.
Contact: Ms.lily Ma
Tel: 86-755-82539044-837
Adddate: 2010-03-14
About WM8012CD
PDF/DataSheet Download
Datasheet: WM8012CD
File Size: 86929 KB
Manufacturer:
Download : Click here to Download
WM8731 Supplier
WM8731
MFG: WM Package Cooled: SSOP D/C: 03+ Qty: 105
Action Dynamic Tech(HK) Trading Co.
Contact: Ms.lily Ma
Tel: 86-755-82539044-837
Adddate: 2010-03-14
WM8731
D/C: 8990
Action Dynamic Tech(HK) Trading Co.
Contact: Ms.lily Ma
Tel: 86-755-82539044-837
Adddate: 2010-03-14
WM8731
Qty: 5 Note: STOCK
Jixin Technology HongKong Development Co.,Ltd
Contact: Ms.yi
Tel: 0086-755-8254-4498
Adddate: 2010-03-14
WM8731
MFG: WOLFSON Package Cooled: QFN D/C: 07+ Qty: 10000 Note: new &original
Contact: Ms.Sueki Chen
Tel: 86-0755-83014302
Adddate: 2010-03-14
WM8731
MFG: WOLFSON Package Cooled: SSOP-28 Qty: 1000 Note: CHIPSET(AC＇97 AUDIOCODEC)，原装现货，fjxmw 22/7
Sunnywell Display Systems, Inc
Contact: Mr.awinqiu
Tel: 86-0755-83045321
Adddate: 2010-03-14
WM8731
Package Cooled: SOT D/C: O5 Qty: 3000 Note: absolutely new & original stock
E-TECH TECHNOLOGY (ASIA) CO.,LTD.
Contact: Mr.ChenMarvin
Tel: 0086-0755-83678281
Adddate: 2010-03-14
WM8731
MFG: WM Package Cooled: SSOP-28 D/C: 08+ Qty: 5000
Towering Int'l Elec tech (UK) Co.,Ltd
Contact: Ms.Daphne马
Tel: 86-0755-83015633
Adddate: 2010-03-14
WM8731-3CABWRV
D/C: 1300 Qty: 03+
HongGuangShengYe Electronics Co., Ltd.
Contact: Ms.Berry
Tel: 86-755-83040460
Adddate: 2010-03-14
About WM8731
PDF/DataSheet Download
Datasheet: WM8731
File Size: 131080 KB
Manufacturer: WOLFSON [Wolfson Microelectronics plc]
Download : Click here to Download
WM8729ED Supplier
WM8729ED
MFG: WM D/C: O9+ Qty: 500000 Note:
SHENZHEN KJX Electronic Co.,Lt
Contact: Mr.Caicaoze
Tel: 00086-0755-82985878
Adddate: 2010-03-14
WM8729ED
MFG: SMD Package Cooled: SOP-16 D/C: 06+ Qty: 0 Note: New in orginal, stock offer.
WEIHAO ELECTRONICS (H.K) CO., LIMITED
Contact: Mr.minkinZhou
Tel: 0086-755-82736887
Adddate: 2010-03-14
WM8729ED
MFG: WOLFONS Qty: 16 Note: RFQ,CALL FOR PRICE
Grand Parts Electronics Corporation
Contact: Mr.Marco
Tel: 86-755-8281-4478
Adddate: 2010-03-14
WM8729ED
MFG: WOLFONS Package Cooled: SOP16 Qty: 16
Contact: Ms.Carol
Tel: 86-755-83740377
Adddate: 2010-03-14
WM8729ED
MFG: NN D/C: 07+ Qty: 5688 Note: new & original
Contact: Ms.Sueki Chen
Tel: 86-0755-83014302
Adddate: 2010-03-14
WM8729ED
Package Cooled: 70 D/C: 2005 Qty: SMD Note: stock
LI DA WEI (HONGKONG) ELECTRONICS CO
Contact: Ms.chanDaisy
Tel: 852--26726447
Adddate: 2010-03-14
WM8010-33FR
MFG: TI Package Cooled: QFP D/C: 97+ Qty: 10000
HongGuangShengYe Electronics Co., Ltd.
Contact: Ms.Berry
Tel: 86-755-83040460
Adddate: 2010-03-14
About WM8012CD
PDF/DataSheet Download
Datasheet: WM8012CD
File Size: 86929 KB
Manufacturer:
Download : Click here to Download
WM8731 General Description
integrated headphone driver. It offers the user the unique ability to independently program the ADC and DAC sample rates from a single clock source. The WM8731 is designed specifically for portable MP3 audio and speech players and recorders. The WM8731 is also ideal for MD, CD-RW machines and DAT recorders.
Stereo line and mono microphone level audio inputs are provided, along with a mute function, programmable line level volume control and a bias voltage output suitable for an electret type microphone.
Stereo 24-bit multi-bit sigma delta ADCs and DACs are used with oversampling digital interpolation and decimation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported.
Stereo audio outputs are buffered for driving headphones from a programmable volume control, line level outputs are also provided along with anti-thump mute and power up/down circuitry.
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 28- pin SSOP package.
WM8731 Maximum Ratings
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device.
CONDITION
MIN
MAX
Digital supply voltage
-0.3V
+3.63V
Analogue supply voltage
-0.3V
+3.63V
Voltage range digital inputs
DGND -0.3V
DVDD +0.3V
Voltage range analogue inputs
AGND -0.3V
DVDD +0.3V
Master Clock Frequency (see Note 4)
40MHz
Operating temperature range, TA
-10°C
+70°C
Storage temperature
-65°C
+150°C
Package body temperature (soldering 10 seconds)
+240°C
Package body temperature (soldering 2 minutes)
+183°C
Notes:
1. Analogue and digital grounds must always be within 0.3V of each other.
2. The digital supply core voltage (DCVDD) must always be less than or equal to the analogue supply voltage (AVDD) ordigital supply buffer voltage (DBVDD).
3. The digital supply buffer voltage (DBVDD) must always be less than or equal to the analogue supply voltage (AVDD).
4. When CLKIDIV2 = 1.
WM8731 Features
• Audio Performance
− 97dB SNR (‘A’ weighted @ 48kHz) ADC
− 100dB SNR (‘A’ weighted @ 48kHz) DAC
− 1.42 – 3.6V Digital Supply Operation
− 2.7 – 3.6V Analogue Supply Operation
• ADC and DAC Sampling Frequency: 8kHz – 96kHz
• Selectable ADC High Pass Filter
• 2 or 3-Wire MPU Serial Control Interface
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
− Master or Slave Clocking Mode
• Stereo Audio Inputs and Outputs
• Microphone Input and Electret Bias with Side Tone Mixer
• Input and Output Volume and Mute Controls
• Highly Efficient Headphone Driver
• Playback Mode Power Consumption < 18mW
• Analogue Pass Through Power Consumption < 9mW
• 28-Pin SSOP Package
WM8731 Typical Application
• Portable MP3 Players and Recorders
• CD and Minidisc Recorders
WM8731 Connection Diagram
