DDC2256A
- Single-Chip Solution to Directly Measure 256 Low-
Level Currents Simultaneously - User Adjustable Full-Scale Range
- Adjustable Speed with Integration Times as Low
as 58.8 µs (17 KSPS per channel) with 24 bit
Resolution - Power Dissipation as Low as 1.7mW/channel
- Integral Linearity: ±0.025% of Reading ±1 ppm of
Full Scale Reading (all channels active) - Low Noise
- 24 bit ADC
- No Charge Loss and Simultaneous Sampling
- On-board Temperature Sensor
- In-Package Bypass Capacitors and Reference
Buffer to Reduce PCB Area and Design Complexity - Serial LVDS and CMOS Output Interface Option
The DDC2256A is a 24-bit, 256-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage integration and A/D conversion so that 256 individual low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized in parallel (simultaneously).
For each of the inputs, the DDC2256A has one low noise/low power integrator designed to capture all the charge from the sensor. The integration time is adjustable from 58.8μs to 100 ms, allowing currents from fA to µA to be continuously measured with outstanding precision. The outputs of the integrators are digitized by sixteen 24-bit low power ADCs and all the resulting data is output over a single LVDS serial interface pair designed to minimize noise coupling in environments with high channel count.
The DDC2256A operates from ±2.5-V analog supply, 1.8-V analog supply (AVDD_18) and 1.8-V digital supply (DVDD). The device is specified from 0°C to 70°C operating temperature and available in a 14 × 16 mm2 323-ball 0.8 mm-pitch BGA. Finally, the on board reference buffer and bypass capacitors help minimize the external component requirements and further reduce board space.
To request a full data sheet or other design resources: request DDC2256A
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技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | DDC2256A 256-Channel, Current-Input Analog-To-Digital Converter 数据表 (Rev. B) | PDF | HTML | 2016-5-27 |
设计与开发
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DDC2256AEVM — DDC2256A 256 通道电流输入模数转换器评估模块
DDC2256AEVM 评估模块 (EVM) 是一款适用于 256 通道、电流输入、24 位模数 (A/D) 转换器 DDC2256A 的评估套件。该 EVM 套件由 DUT 板和采集板组成，包括 2 个 DDC2256A 器件、1 个用于器件通信/配置的 FPGA、用于存储临时数据的 36MB 内存，以及 1 个用于连接 PC 的 USB 接口。该 EVM 包括所有必要的控制信号和板载电源，大大降低了对外部设备的需求。最后，该评估系统还包括适用于 Microsoft® Windows® 的易于使用的软件。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| NFBGA (ZZF) | 323 | Ultra Librarian |
订购和质量
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