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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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DDC2256A 256-Channel, Current-Input Analog-To-Digital Converter datasheet (Rev. B) | PDF | HTML | 2016年 5月 27日 |
| EVM User's guide | DDC2256AEVM Introduction User's Guide | 2016年 4月 1日 |
設計與開發
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DDC2256AEVM — DDC2256A 256 通道電流輸入類比轉數位轉換器評估模組
DDC2256AEVM 評估模組 (EVM) 是用於 DDC2256A 的評估套件，這是一款是 256 通道、電流輸入、24 位元類比轉數位 (A/D) 轉換器。EVM 套件由 DUT 電路板和擷取板組成，包含兩個 DDC2256A 裝置、一個用於裝置通訊/配置的 FPGA、用於臨時資料儲存的 36MB 記憶體，以及一個用於連接 PC 的 USB 介面。EVM 包含所有必要的控制訊號及板載功率產生，因而大幅降低對外部設備的需求。最後，評估系統還為 Microsoft® Windows® 提供了易於使用的軟體。
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| NFBGA (ZZF) | 323 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。