DDC1128
- Single-Chip Solution to Directly Measure
128 Low-Level Currents - Proven High-Precision, True Integrating
Architecture with 100% Charge Collection - Easy Upgrade for Existing DDC Family
Applications - Low Power: 3 mW/channel at 3 kSPS
- 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
- Data Rates up to 6 kSPS with 20-bit
- Daisy-Chainable Serial Interface
- In-Package Bypass Capacitors Simplify PCB
Design Area and Design Complexity
The DDC1128 is a 20-bit, 128-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 128 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.
For each of the 128 inputs, the DDC1128 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 stable offset and a loss-less collection of the input current. Adjustable integration times range from 160µs to 1s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.
The DDC1128 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-DDC1128 system is minimal.
The DDC1128 operates from a +5 V analog supply and a 2.7 V to 3.6 V digital supply, it is specified from 0°C to 70°C operating temperature and it is available in a 9 × 9 mm2 192-ball BGA, which includes on board bypass capacitors to help minimize the external component requirements and further reduce board space.
To request a full data sheet or other design resources: request DDC1128
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DDC1128 128-Channel, Current-Input Analog-to-Digital Converter datasheet (Rev. A) | PDF | HTML | 2016年 5月 27日 |
| Analog Design Journal | Selecting a multichannel ultra-low-current measurement IC | PDF | HTML | 2022年 3月 18日 | |
| EVM User's guide | DDC1128 EVM Intro User's Guide | 2014年 3月 19日 |
設計與開發
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DDC1128EVM — DDC1128 128 通道電流輸入類比轉數位轉換器評估模組
The DDC1128EVM evaluation module (EVM) is an evaluation kit for evaluating the DDC1128, a 128-channel, current input, 20-bit analog-to-digital (A/D) converter. The EVM consists of two DDC1128 devices, a USB device for interfacing to a PC, an FPGA for device (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 引腳 | 下載 |
|---|---|---|
| NFBGA (ZKL) | 192 | 檢視選項 |
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