DDC232 - DDC232：32 通道电流输入模数转换器

DDC232是TI德州仪器公司的一款电流输入ADC产品，DDC232是DDC232：32 通道电流输入模数转换器，本站介绍了DDC232的封装应用图解、特点和优点、功能等，并给出了与DDC232相关的TI元器件型号供参考。

DDC232 - DDC232：32 通道电流输入模数转换器 - 电流输入ADC - 模数转换器 - 德州仪器

产品描述

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.

产品特性

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

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