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参数

Number of input channels 64 Resolution (Bits) 20 Features Computed Tomography (CT) Operating temperature range (C) 0 to 70 Interface type Serial open-in-new 查找其它 计算机断层扫描 (CT) AFE

封装|引脚|尺寸

NFBGA (ZAW) 100 81 mm² 9 x 9 open-in-new 查找其它 计算机断层扫描 (CT) AFE

特性

  • Single-Chip Solution to Directly Measure 64 Low-Level Currents
  • Proven High-Precision, True Integrating Architecture With 100% Charge Collection
  • Easy Upgrade for Existing DDC Family Applications
  • Very Low Power: 3 mW/channel
  • Extremely Linear: INL = ±0.025% of Reading ±1 ppm of FSR
  • Low Noise: 6.3 ppm of FSR
  • Adjustable Full-Scale Range
  • Adjustable Speed
    • Data Rates up to 6 kSPS With 20-bit Performance
    • Integration Times as low as 160 µs
  • 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

open-in-new 查找其它 计算机断层扫描 (CT) AFE

描述

The DDC264 is a 20-bit, 64-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 64 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.

For each of the 64 inputs, the DDC264 uses the proven 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. This architecture provides both a very stable offset and a loss-less collection of the input current. Adjustable integration times range from 160 µs to 1 s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.

The DDC264 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-DDC264 system is minimal.

The DDC264 uses a 5-V analog supply and a 2.7-V to 3.6-V digital supply. Bypass capacitors within the DDC264 package help minimize the external component requirements. Operating over the temperature range of 0°C to 70°C, the DDC264 100-pin NFBGA package is offered in two versions: the DDC264C for low-power applications, and the DDC264CK when higher speeds are required.

open-in-new 查找其它 计算机断层扫描 (CT) AFE
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技术文档

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类型 标题 下载最新的英文版本 发布
* 数据表 DDC264 64-Channel, Current-Input Analog-to-Digital Converter 数据表 2016年 12月 12日
技术文章 Offset correction improves the next generation of heart-rate smart watches 2015年 8月 24日
技术文章 A new way to illuminate the human condition 2013年 12月 30日
技术文章 Oximeter signaling: There’s more than meets the eye 2013年 12月 4日
技术文章 Virtual hospital implementation using a worn health monitor 2013年 11月 13日
用户指南 DDC264EVM User Guide 2011年 3月 20日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
document-generic 用户指南
299
说明

The DDC264EVM provides an easy-to-use platform for evaluating the DDC264 charge digitizing A/D converters. A PC interface board and four DDC264 devices are included along with software that makes analysis and testing of these devices manageable.

特性
  • The DDC264 is a wide range, charge digitizing A/D converter with 20-bit resolution
  • Low-level current output devices, such as photo sensors, can be directly connected to the DDC264 input
  • The DDC264 combines current-to-voltage conversion, integration, and digital filtering to produce wide range of (...)

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CAD/CAE 符号

封装 引脚 下载
NFBGA (ZAW) 100 了解详情

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