ADA4571

RECOMMENDED FOR NEW DESIGNS

Integrated AMR Angle Sensor and Signal Conditioner

Data Sheet (Rev. 0) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.41

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Overview

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
V_DD from 2.7 V to 5.5 V
Minimum phase delay
Qualified for automotive applications
Available in an 8-lead SOIC package

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

Contactless angular measurement.
Measures magnetic field direction rather than field intensity.
Minimum sensitivity to air gap variations.
Large working distance.
Excellent accuracy, even for weak saturation fields.
Minimal thermal and lifetime drift.
Negligible hysteresis.
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

Part Models: 4
1ku List Price: Starting From $1.41

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADA4571BRZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADA4571BRZ-R7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADA4571BRZ-RL	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADA4571WHRZ-R7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 1, 2019 - 18_0212 Addition of Alternate Wafer Fab (ADI Limerick) for ADA4571 Sensor Die
		PCN18_0212_Form Material_Report Qualification Results Summary
ADA4571BRZ	PRODUCTION
ADA4571BRZ-R7	PRODUCTION
ADA4571BRZ-RL	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

Virtual Eval - BETA

Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.

Open Tool

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

ADA4571 Evaluation Board

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Features and Benefits

USB 2.0 interface
Jumper or computer controlled temperature compensation mode enable
Jumper or computer controlled power-down mode enable
Measurement test points and coaxial connectors

Product Details

The EV-ADA4571RSDZ evaluation board features the ADA4571 in an end of shaft magnet configuration. The evaluation kit is composed of an ADA4571 motherboard, a magnetic stimulus on a hand turnable mount, a USB interface, and an SDP-S controller board. The required LabVIEW 2015 graphical user interface (GUI) software for Windows^® is available for download from the EV-ADA4571RSDZ product page.

The EV-ADA4571RSDZ evaluation board features an on-board 5 V regulator; a 4-channel simultaneous sampling, analog-to-digital converter (ADC); and jumpers for enabling the temperature compensation and power-down modes within the ADA4571. The ADA4571 motherboard also features test points and unpopulated coaxial connectors for the three outputs of the device.

The SDP-S controller board controls the ADC on the ADA4571 motherboard, reading back the ADA4571 outputs to change the digital inputs to the ADA4571, interface with the GUI, and supply power to the evaluation board through the USB connection.

For full details, see the ADA4571 data sheet, which must be used in conjunction with the user guide when using the evaluation board.