DESCRIPTION

· The ADA4570 is an anisotropic magnetoresistive (AMR) sensor with integrated signal conditioning amplifiers and ADC drivers.

· It provides two differential analog outputs indicating the angular position of the surrounding magnetic field.

· The device consists of two dies: an AMR sensor and a fixed gain instrumentation amplifier.

· It outputs amplified differential cosine and sine signals based on the angle of the magnetic field rotating in the x-y plane.

· The output voltage range is ratiometric to the supply voltage.

· It features two Wheatstone bridges at a 45° relative angle, producing two periods on sinusoidal outputs per magnet rotation.

· The sensor is available in an 8-lead SOIC package.

FEATURES

· Contactless angular measurement with high precision for 180° angles.

· Typical angular error of ±0.1° and low output noise of 850 μV rms.

· Provides sine and cosine differential outputs with ratiometric analog voltage outputs.

· Features negligible hysteresis and compatibility with SAR or Σ-Δ ADCs.

· Includes a temperature-compensated AMR bridge.

· Operates in industrial (-40°C to +125°C) and automotive (-40°C to +150°C) temperature ranges.

· EMI resistant with fault diagnostics.

· Supports VDD from 2.7 V to 5.5 V with minimal phase error of 0.85° at 30,000 rpm.

· AEC-Q100 qualified for automotive applications and available in a single chip solution.

APPLICATIONS

· Absolute position measurement for both linear and angular applications.

· Control and positioning in brushless DC motors and actuators.

· Contactless angular measurement and detection.

· Magnetic angular position sensing.