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.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | DDC264 64-Channel, Current-Input Analog-to-Digital Converter datasheet (Rev. D) | PDF | HTML | 2016. 12. 12 | |
| 아날로그 디자인 학술지 | Selecting a multichannel ultra-low-current measurement IC | PDF | HTML | 2022. 3. 18 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
DDC264EVM — DDC264 평가 모듈
The DDC264EVM provides an easy-to-use platform for evaluating the DDC264 charge digitizing A/D converters. A PC interface board and four DDC264 devices are included along with software that makes analysis and testing of these devices manageable.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| NFBGA (ZAW) | 100 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.