DDC264
- Single-Chip Solution to Directly Measure 64 Low-Level Currents
- Proven High-Precision, True Integrating Architecture With 100% Charge Collection
- Easy Upgrade for Existing DDC Family Applications
- Very Low Power: 3 mW/channel
- 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
- 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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The DDC264 is a 20-bit, 64-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 64 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.
For each of the 64 inputs, the DDC264 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 very stable offset and a loss-less collection of the input current. Adjustable integration times range from 160 µs to 1 s, allowing currents from fAs to µAs to be continuously measured with outstanding precision.
The DDC264 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-DDC264 system is minimal.
The DDC264 uses a 5-V analog supply and a 2.7-V to 3.6-V digital supply. Bypass capacitors within the DDC264 package help minimize the external component requirements. Operating over the temperature range of 0°C to 70°C, the DDC264 100-pin NFBGA package is offered in two versions: the DDC264C for low-power applications, and the DDC264CK when higher speeds are required.
技術資料
| 種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
|---|---|---|---|---|---|---|
| * | データシート | DDC264 64-Channel, Current-Input Analog-to-Digital Converter データシート (Rev. D) | PDF | HTML | 2016年 12月 12日 | ||
| Analog Design Journal | Selecting a multichannel ultra-low-current measurement IC | PDF | HTML | 2022年 3月 18日 | |||
| EVM ユーザー ガイド (英語) | DDC264EVM User Guide | 2011年 3月 20日 |
設計および開発
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| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| NFBGA (ZAW) | 100 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点
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