Overview

Features and Benefits

  • 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

Product Details

The ADA4571 is an anisotropic magnetoresistive (AMR) sensor with integrated signal conditioning amplifiers and ADC drivers. The ADA4571 produces two analog outputs that indicate the angular position of the surrounding magnetic field.

The ADA4571 consists of two die within one package, an AMR sensor, and a fixed gain (G = 40 nominally) instrumentation amplifier. The ADA4571 delivers clean and amplified cosine and sine output signals related to the angle of a rotating magnetic field. The output voltage range is ratiometric to the supply voltage.

The sensor contains two Wheatstone bridges, at a relative angle of 45° to one another. A rotating magnetic field in the x-y sensor plane delivers two sinusoidal output signals with the double frequency of the angle (α) between sensor and magnetic field direction. Within a homogeneous field in the x-y plane, the output signals are independent of the physical placement in the z direction (air gap).

The ADA4571 is available in an 8-lead SOIC package.

Product Highlights

  1. Contactless angular measurement.
  2. Measures magnetic field direction rather than field intensity.
  3. Minimum sensitivity to air gap variations.
  4. Large working distance.
  5. Excellent accuracy, even for weak saturation fields.
  6. Minimal thermal and lifetime drift.
  7. Negligible hysteresis.
  8. Single chip solution.

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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.