Datasheet > WM8181

WM8181

更新时间： 2024-09-26 22:13:51

品牌	Logo	应用领域
欧胜 - WOLFSON		转换器
页数	文件大小	规格书
14页	151K
描述
12-bit 2MSPS Serial Output CIS/CCD Digitiser

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中文翻译

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WM8181 数据手册

WM8181

12-bit 2MSPS Serial Output CIS/CCD Digitiser

Advanced Information, January 2000, Rev 3.0

DESCRIPTION

FEATURES

•

12-bit 2MSPS ADC

No missing codes

Serial output

Simple clocking

Internal or external ADC reference range control

Accepts positive or negative video

Rail to rail input range

Reset-level clamp switch

3.3V or 5V single supplies

5V/3.3V dual supplies

The WM8181 is a 12-bit resolution, 2MSPS single channel

image digitiser which is designed for easy interface to either

CIS or CCD linear image sensors. Data is output in serial

mode. The applied clock frequency (MCLK) equals the bit

rate of the data output. The sample rate of the WM8181 can

be either 1/12th or 1/16th of the applied master clock

frequency.

The device can be configured for either single-ended or

differential input operation. In single ended input mode, a

reset clamp voltage can be applied to the analogue signal,

under the control of a digital signal at the CLAMP pin. The

WM8181 will accept either positive or negative-going video

signals at any voltage between AGND and AVDD. The ADC

references are internally generated. The range of these

references may be derived internally using a bandgap

generator or externally using the VREFIN pin.

23mA supply current

16-pin wide body SOIC package

APPLICATIONS

•

USB bus powered scanners

Flatbed scanners

Sheetfeed scanners

Contact image sensors (CIS)

Linear CCDs

The WM8181 is powered from either 3.3V or 5V single

supplies. The device may also be powered from split 5V

and 3.3V dual supplies. Typically, the WM8181 consumes

23mA supply current in normal operation. When the device

is powered down, the supply current falls to less than 1µA.

The WM8181 is available in a 16-pin wide-body SOIC

package.

BLOCK DIAGRAM

AVDD

(16)

VSMP

(12)

MCLK

(13)

TIMING AND

POWER DOWN CONTROL

WM8181

(15) DVDD

(14) DOUT

(10) DGND

VINP (4)

PARALLEL

SERIAL

SAMPLE/

HOLD

ADC

VINM (5)

CLAMP (11)

0.8*VDD

VREFIN (3)

VRT/VRB

1.5V

BAND-

GAP

GENERATOR

(1)

(2)

(7)

(6)

AGND1 AGND2

VRT

VRB

WOLFSON MICROELECTRONICS LTD

Advanced Information data sheets contain

preliminary data on new products in the

preproduction phase of development.

Supplementary data will be published at a

later date.

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

http://www.wolfson.co.uk

2000 Wolfson Microelectronics Ltd

12 3 4 5 6 7...14

中文翻译

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WM8192	WOLFSON	获取价格	(8+8) Bit Output 16-bit CIS/CCD AFE/Digitiser
WM8195	WOLFSON	获取价格	14-bit 12MSPS CIS/CCD Analogue Front End/Digitiser
WM8195_05	WOLFSON	获取价格	14-bit 12MSPS CIS/CCD Analogue Front End/Digitiser
WM8196	WOLFSON	获取价格	(8+8)BIT OUTPUT 16-BIT CIS/CCD AFE/DIGITISER
WM8196_07	WOLFSON	获取价格	(8 + 8) Bit Output 16-bit CIS/CCD AFE/Digitiser
WM8196SCDS	WOLFSON	获取价格	(8 + 8) Bit Output 16-bit CIS/CCD AFE/Digitiser
WM8196SCDS/R	WOLFSON	获取价格	(8 + 8) Bit Output 16-bit CIS/CCD AFE/Digitiser
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