DRV421
- High-Precision Integrated Fluxgate Sensor
- Offset and Drift: ±8 µT max, ±5 nT/°C typ
- Extended Current Measurement Range
- H-Bridge Output Drive: ±250 mA typ at 5 V
- Precision Shunt Sense Amplifier
- Offset and Drift (max): ±75 µV, ±2 µV/°C
- Gain Error and Drift (max): ±0.3%, ±5 ppm/°C
- Precision Reference
- Accuracy and Drift (max): ±2%, ±50 ppm/°C
- Pin-Selectable Voltage: 2.5 V or 1.65 V
- Selectable Ratiometric Mode: VDD/2
- Magnetic Core Degaussing Feature
- Diagnostic Features: Overrange and Error Flags
- Supply Voltage Range: 3.0 V to 5.5 V
- Fully Specified Over the Extended Industrial Temperature Range of –40°C to +125°C
The DRV421 is designed for magnetic closed-loop current sensing solutions, enabling isolated, precise dc- and ac-current measurements. This device provides both, a proprietary integrated fluxgate sensor, and the required analog signal conditioning, thus minimizing component count and cost. The low offset and drift of the fluxgate sensor, along with an optimized front-end circuit results in unrivaled measurement precision.
The DRV421 provides all the necessary circuit blocks to drive the current-sensing feedback loop. The sensor front-end circuit is followed by a filter that can be configured to work with a wide range of magnetic cores. The integrated 250-mA H-Bridge drives the compensation coil, while doubling the current measurement range, compared to conventional single-ended drive methods. The device also provides a precision voltage reference and shunt sense amplifier to generate and drive the analog output signal.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | DRV421 Integrated Magnetic Fluxgate Sensor for Closed-Loop Current Sensing datasheet (Rev. B) | PDF | HTML | 2016. 3. 14 | |
| 백서 | Achieve greater precision, reliability with magnetic sensing technology | 2017. 6. 26 | |||
| 애플리케이션 노트 | Designing with the DRV421: System Parameter Calculator | 2015. 8. 14 | |||
| 애플리케이션 노트 | Designing with the DRV421: Control Loop Stability | 2015. 8. 5 | |||
| 애플리케이션 노트 | Designing with the DRV421: Closed Loop Current Sensor Specifications | 2015. 7. 22 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
DRV421EVM — DRV421 평가 모듈
The DRV421EVM is an evaluation platform for the DRV421, a complete analog front end IC and coil driver for closed loop current sensing applications. The DRV421EVM allows the user to explore all the features of the DRV421 device.
SLOC329 — DRV421 System Parameter Calculator
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| WQFN (RTJ) | 20 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.