The ADA4571WHRZ-R7 is an anisotropic magnetoresistive (AMR) sensorwith integrated signal conditioning amplifiers and ADC drivers.The ADA4571WHRZ-R7 produces two analog outputs that indicate theangular position of the surrounding magnetic field.
The ADA4571WHRZ-R7 consists of two die within one package, an AMRsensor, and a fixed gain (G = 40 nominally) instrumentationamplifier. The ADA4571WHRZ-R7 delivers clean and amplified cosineand sine output signals related to the angle of a rotatingmagnetic field. The output voltage range is ratiometric to thesupply voltage.
The sensor contains two Wheatstone bridges, at a relative angleof 45° to one another. A rotating magnetic field in the x-ysensor plane delivers two sinusoidal output signals with thedouble frequency of the angle (α) between sensor and magneticfield direction. Within a homogeneous field in the x-y plane,the output signals are independent of the physical placement inthe z direction (air gap).
The ADA4571WHRZ-R7 is available in an 8-lead SOIC package.
Product Highlights
Feature
- High precision 180° angle sensor
- Maximum angular error of 0.5°
- Analog sine and cosine outputs
- Ratiometric output voltages
- Low thermal and lifetime drift
- SAR or Σ-∆ analog-to-digital converter (ADC) drive capable
- Magnetoresistive (MR) bridge temperature compensation mode
- Temperature range: −40°C to +150°C
- EMI resistant
- Fault diagnostics
- VDD from 2.7 V to 5.5 V
- Minimum phase delay
- Qualified for automotive applications
- Available in an 8-lead SOIC package
Applications
- Absolute position measurement (linear and angle)
- Brushless dc motor control and positioning
- Actuator control and positioning
- Contactless angular measurement and detection
- Magnetic angular position sensing
(Picture: Pinout)
