产品详情

Number of input channels 2 Resolution (Bits) 20 Features Computed Tomography (CT) Operating temperature range (°C) -40 to 85 Interface type Serial Rating Catalog
Number of input channels 2 Resolution (Bits) 20 Features Computed Tomography (CT) Operating temperature range (°C) -40 to 85 Interface type Serial Rating Catalog
SOIC (DW) 28 184.37 mm² 17.9 x 10.3 TQFP (PJT) 32 81 mm² 9 x 9
  • MONOLITHIC CHARGE MEASUREMENT ADC
  • DIGITAL FILTER NOISE REDUCTION:
       3.2ppm, rms
  • INTEGRAL LINEARITY:
       ±0.005% Reading ±0.5ppm FSR
  • HIGH PRECISION,TRUE INTEGRATING FUNCTION
  • PROGRAMMABLE FULL SCALE
  • SINGLE SUPPLY
  • CASCADABLE OUTPUT
  • APPLICATIONS
    • DIRECT PHOTOSENSOR DIGITIZATION
    • CT SCANNER DAS
    • INFRARED PYROMETER
    • PRECISION PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS

Protected by US Patent #5841310
All trademarks are the property of their respective owners.

  • MONOLITHIC CHARGE MEASUREMENT ADC
  • DIGITAL FILTER NOISE REDUCTION:
       3.2ppm, rms
  • INTEGRAL LINEARITY:
       ±0.005% Reading ±0.5ppm FSR
  • HIGH PRECISION,TRUE INTEGRATING FUNCTION
  • PROGRAMMABLE FULL SCALE
  • SINGLE SUPPLY
  • CASCADABLE OUTPUT
  • APPLICATIONS
    • DIRECT PHOTOSENSOR DIGITIZATION
    • CT SCANNER DAS
    • INFRARED PYROMETER
    • PRECISION PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS

Protected by US Patent #5841310
All trademarks are the property of their respective owners.

The DDC112 is a dual input, wide dynamic range, charge-digitizing analog-to-digital (A/D) converter 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.

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 programmable full-scale ranges, external integrating capacitors allow an additional user-settable full-scale range of up to 1000pC.

To provide single-supply operation, the internal A/D converter utilizes a differential input, with the positive input tied to VREF. When the integration capacitor is reset at the beginning of each integration cycle, the capacitor charges to VREF. This charge is removed in proportion to the input current. At the end of the integration cycle, the remaining voltage is compared to VREF.

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 or TQFP-32 package and is offered in two performance grades.

The DDC112 is a dual input, wide dynamic range, charge-digitizing analog-to-digital (A/D) converter 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.

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 programmable full-scale ranges, external integrating capacitors allow an additional user-settable full-scale range of up to 1000pC.

To provide single-supply operation, the internal A/D converter utilizes a differential input, with the positive input tied to VREF. When the integration capacitor is reset at the beginning of each integration cycle, the capacitor charges to VREF. This charge is removed in proportion to the input current. At the end of the integration cycle, the remaining voltage is compared to VREF.

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 or TQFP-32 package and is offered in two performance grades.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 DDC112: Dual Current Input 20-Bit Analog-To-Digital Converter 数据表 (Rev. B) 2004年 10月 6日
技术文章 Designing signal chains for portable diagnostics PDF | HTML 2022年 5月 18日
模拟设计期刊 选择多通道超低电流测量 IC PDF | HTML 英语版 PDF | HTML 2022年 1月 20日
技术文章 Helping physicians achieve faster, more accurate patient diagnoses with molecular PDF | HTML 2020年 5月 20日
EVM 用户指南 DDC11xEVM-PDK User's Guide (Rev. A) 2010年 7月 9日
更多文献资料 DDC11xEVM Readme Page Thank You Letter 2007年 11月 7日
应用手册 Creating a Bipolar Input Range for the DDC112 2000年 9月 27日
用户指南 DEM-DDC112U-C: Demonstration Fixture for the DDC112 2000年 9月 27日
应用手册 Multi-DDC112 DUT Board for the DDC112 Evaluation Fixture 2000年 9月 27日
应用手册 Retrieving Data from the DDC112 2000年 9月 27日
应用手册 The DDC112\'s Test Mode 2000年 9月 27日
应用手册 Understanding The DDC112\'S Continuous and Non-Continuous Modes 2000年 9月 27日
应用手册 Using External Integration Capacitors on the DDC112 2000年 9月 27日

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DDC11XEVM-PDK — DDC11xEVM-PDK 性能演示套件

The DDC11xEVM-PDK provides an easy-to-use platform for evaluating the DDC112 or DDC114 charge digitizing A/D converters. A PC interface board (DDCMB) and daughter boards for the DDC112 or DDC114 are included along with software that makes analysis and testing of these devices manageable.

用户指南: PDF
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光绘文件

DDC112EVM Gerber

SBAC114.ZIP (240 KB)
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封装 引脚 下载
SOIC (DW) 28 查看选项
TQFP (PJT) 32 查看选项

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  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
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  • 制造厂地点
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