제품 상세 정보

Number of input channels 1 Features Magnetic Field Sensor Operating temperature range (°C) -40 to 125 Vs (min) (V) 3 Vs (max) (V) 5.5 Interface type Analog voltage Rating Catalog
Number of input channels 1 Features Magnetic Field Sensor Operating temperature range (°C) -40 to 125 Vs (min) (V) 3 Vs (max) (V) 5.5 Interface type Analog voltage Rating Catalog
WQFN (RTJ) 20 16 mm² 4 x 4
  • 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
  • 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.

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.

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기술 자료

star =TI에서 선정한 이 제품의 인기 문서
검색된 결과가 없습니다. 검색어를 지우고 다시 시도하십시오.
6개 모두 보기
유형 직함 날짜
* Data sheet DRV421 Integrated Magnetic Fluxgate Sensor for Closed-Loop Current Sensing datasheet (Rev. B) PDF | HTML 2016/03/14
White paper Achieve greater precision, reliability with magnetic sensing technology 2017/06/26
EVM User's guide DRV421EVM Users Guide (Rev. A) 2015/08/24
Application note Designing with the DRV421: System Parameter Calculator 2015/08/14
Application note Designing with the DRV421: Control Loop Stability 2015/08/05
Application note Designing with the DRV421: Closed Loop Current Sensor Specifications 2015/07/22

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

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.

사용 설명서: PDF
TI.com에서 구매 불가
계산 툴

SLOC329 DRV421 System Parameter Calculator

지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
신호 조절기
DRV421 폐쇄형 루프 애플리케이션의 통합 플럭스 게이트 자기 센서 IC
패키지 CAD 기호, 풋프린트 및 3D 모델
WQFN (RTJ) 20 Ultra Librarian

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

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