DDC3256
- Single-chip solution to directly measure 256 low-level currents simultaneously
- Adjustable full-scale charge range up to 320 pC
- Input current: 1 µA (maximum)
- Adjustable speed with integration times as low as 50 µs (20 KSPS per channel)
- Resolution: 24 bit
- Low power dissipation: 1.2 mW/channel
- Integral non-linearity: ±0.025% of reading ±1 ppm of full scale range (all channels active)
- Low noise: 0.26 fCrms at 320 pC FSR with 20 pF sensor capacitance
- No charge loss
- On-chip temperature sensor
- Serial LVDS output interface
- Single 1.85-V supply
- In-package bypass capacitors and reference buffer to reduce PCB area and design complexity
The DDC3256 is a 24-bit, 256-channel, current-input analog-to-digital (A/D) converter. It combines both, current-to-voltage conversion by current integration, and A/D conversion.
Up to 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 256 inputs, the device has one low noise and low power integrator designed to capture all the charge from the sensor. The integration time is adjustable from 50 µs to 1.6 ms, allowing currents in the order of fA to µA to be continuously measured with outstanding precision. The outputs of the integrators are digitized by on-chip low power ADCs and the converted digital codes are transmitted over a single LVDS pair designed to minimize noise coupling in environments with high channel count.
The DDC3256 operates from single 1.85-V supply. The device is specified from 0°C to 70°C operating temperature and available in a 13.2 × 17.2 mm 2 336-ball 0.8 mm-pitch BGA. The on-chip reference buffer and bypass capacitors (on the BGA) help minimize the external component requirements and further reduce board space.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DDC3256 256-Channel, Current-Input Analog-To-Digital Converter datasheet | PDF | HTML | 2023年 6月 21日 |
| Certificate | DDC3256EVM EU Declaration of Conformity (DoC) | 2023年 6月 22日 |
設計與開發
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DDC3256EVM — DDC3256 評估模組
DDC3256EVM 是用於 DDC3256 裝置的評估模組。EVM 套件包括 DUT 電路板，與 TSWDC155EVM 評估模組 FPGA 無縫整合以進行資料擷取。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。請注意，TSWDC155EVM 需單獨訂購。
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 (ZWX) | 336 | 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。