DDC112U

更新时间： 2024-10-27 22:29:27

品牌	Logo	应用领域
BB		转换器光电二极管
页数	文件大小	规格书
24页	211K
描述
Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER

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中文翻译

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数据手册

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DDC112U 数据手册

DDC112

For most current data sheet and other product

information, visit www.burr-brown.com

Dual Current Input 20-Bit

ANALOG-TO-DIGITAL CONVERTER

FEATURES

DESCRIPTION

● MONOLITHIC CHARGE MEASUREMENT ADC

The DDC112 is a dual input, wide dynamic range,

charge-digitizing analog-to-digital converter (ADC) with

20-bit resolution. Low level current output devices,

such as photosensors, can be directly connected to its

inputs. Charge integration is continuous as each input

uses two integrators; while one is being digitized, the

other is integrating.

● DIGITAL FILTER NOISE REDUCTION:

3.2ppm, rms

● INTEGRAL LINEARITY:

±0.005% Reading ±0.5ppm FSR

● HIGH PRECISION, TRUE INTEGRATING

For each of its two inputs, the DDC112 combines

current-to-voltage conversion, continuous integration,

programmable full-scale range, A/D conversion, and

digital filtering to achieve a precision, wide dynamic

range digital result. In addition to the internal program-

mable full-scale ranges, external integrating capacitors

allow an additional user-settable full-scale range of up

to 1000pC.

FUNCTION

● PROGRAMMABLE FULL SCALE

● SINGLE SUPPLY

● CASCADABLE OUTPUT

APPLICATIONS

● DIRECT PHOTOSENSOR DIGITIZATION

To provide single-supply operation, the internal ADC

utilizes a differential input, with the positive input tied

to V_REF. When the integration capacitor is reset at the

beginning of each integration cycle, the capacitor

charges to V_REF. This charge is removed in proportion

to the input current. At the end of the integration cycle,

● CT SCANNER DAS

● INFRARED PYROMETER

● PRECISION PROCESS CONTROL

● LIQUID/GAS CHROMATOGRAPHY

● BLOOD ANALYSIS

the remaining voltage is compared to V_REF

The high-speed serial shift register which holds the

result of the last conversion can be configured to allow

multiple DDC112 units to be cascaded, minimizing

interconnections. The DDC112 is available in a SO-28

package and is offered in two performance grades.

Protected by US Patent #5841310

AV_DD

AGND

V_REF

DV_DDDGND

CAP1A

CHANNEL 1

DCLK

IN1

Dual

Switched

Integrator

DVALID

CAP1B

∆Σ

Modulator

DXMIT

DOUT

DIN

Digital

Filter

Digital

Input/Output

CAP2A

CHANNEL 2

RANGE2

RANGE1

RANGE0

IN2

Control

Dual

Switched

Integrator

CAP2B

TEST

CLK

CONV

International Airport Industrial Park

•

Mailing Address: PO Box 11400, Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706

• Tel: (520) 746-1111

Twx: 910-952-1111

•

Internet: http://www.burr-brown.com/

•

Cable: BBRCORP Telex: 066-6491

•

FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132

•

PDS-1421D

Printed in U.S.A. January, 2000

DDC112

12 3 4 5 6 7...24

中文翻译

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与DDC112U相关器件

型号	品牌	获取价格	描述	数据表
DDC112U/1K	TI	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112U/1KG4	TI	获取价格	2-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, GREEN, PLASTIC, SOIC-28
DDC112UK	TI	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112UK	BB	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112UK/1K	TI	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112UK/1KG4	TI	获取价格	2-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28, GREEN, PLASTIC, SOIC-28
DDC112Y	TI	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112Y/250	TI	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER
DDC112Y/250G4	TI	获取价格	Dual Current Input 20-Bit Analog-To-Digital Converter 32-TQFP -40 to 85
DDC112Y/2K	TI	获取价格	Dual Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER

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