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计算机断层扫描 (CT) AFE

DDC232

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32 通道电流输入 20 位 ADC

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数据表

DDC232

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数据表 立即订购

产品详情

Number of input channels 32 Resolution (Bits) 20 Features Computed Tomography (CT) Operating temperature range (°C) 0 to 70 Interface type Serial Rating Catalog
Number of input channels 32 Resolution (Bits) 20 Features Computed Tomography (CT) Operating temperature range (°C) 0 to 70 Interface type Serial Rating Catalog
NFBGA (ZXG) 64 64 mm² 8 x 8
  • Single-Chip Solution to Directly Measure 32 Low-Level Currents
  • High-Precision, True Integrating Function
  • Integral Linearity:
    ±0.025% of Reading ±1.0ppm of FSR
  • Very Low Noise: 5.3ppm of FSR
  • Low Power: 7mW/channel
  • Adjustable Full-Scale Range
  • Adjustable Speed
    • Data Rate up to 6kSPS
    • Integration Times as low as 166.5µs
  • Daisy-Chainable Serial Interface
  • In-Package Bypass Capacitors Simplify PCB Design
  • APPLICATIONS
    • CT Scanner DAS
    • Photodiode Sensors
    • X-Ray Detection Systems

All other trademarks are the property of their respective owners.
  • Single-Chip Solution to Directly Measure 32 Low-Level Currents
  • High-Precision, True Integrating Function
  • Integral Linearity:
    ±0.025% of Reading ±1.0ppm of FSR
  • Very Low Noise: 5.3ppm of FSR
  • Low Power: 7mW/channel
  • Adjustable Full-Scale Range
  • Adjustable Speed
    • Data Rate up to 6kSPS
    • Integration Times as low as 166.5µs
  • Daisy-Chainable Serial Interface
  • In-Package Bypass Capacitors Simplify PCB Design
  • APPLICATIONS
    • CT Scanner DAS
    • Photodiode Sensors
    • X-Ray Detection Systems

All other trademarks are the property of their respective owners.

The DDC232 is a 20-bit, 32-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 32 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.

For each of the 32 inputs, the DDC232 provides a dual-switched integrator front-end. This configuration allows for continuous current integration: while one integrator is being digitized by the onboard A/D converter, the other is integrating the input current. Adjustable integration times range from 166µs to 1s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.

The DDC232 has a serial interface designed for daisy-chaining in multi-device systems. Simply connect the output of one device to the input of the next to create the chain. Common clocking feeds all the devices in the chain so that the digital overhead in a multi-DDC232 system is minimal.

The DDC232 uses a +5V analog supply and a +2.7V to +3.6V digital supply. Operating over the temperature range of 0°C to +70°C, the DDC232 BGA-64 package is offered in two versions: the DDC232C for low-power applications, and the DDC232CK when higher speeds are required.

The DDC232 is a 20-bit, 32-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 32 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.

For each of the 32 inputs, the DDC232 provides a dual-switched integrator front-end. This configuration allows for continuous current integration: while one integrator is being digitized by the onboard A/D converter, the other is integrating the input current. Adjustable integration times range from 166µs to 1s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.

The DDC232 has a serial interface designed for daisy-chaining in multi-device systems. Simply connect the output of one device to the input of the next to create the chain. Common clocking feeds all the devices in the chain so that the digital overhead in a multi-DDC232 system is minimal.

The DDC232 uses a +5V analog supply and a +2.7V to +3.6V digital supply. Operating over the temperature range of 0°C to +70°C, the DDC232 BGA-64 package is offered in two versions: the DDC232C for low-power applications, and the DDC232CK when higher speeds are required.
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类型 标题 下载最新的英语版本 日期
* 数据表 32-Channel, Current-Input Analog-to-Digital Converter 数据表 (Rev. D) 2010年 4月 30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

设计和开发

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仿真模型

DDC232 IBIS Model

SBAM168.ZIP (24 KB) - IBIS Model
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