ADA4570
Integrated AMR Angle Sensor and Signal Conditioner with Differential Outputs
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Overview
Features and Benefits
- Contactless angular measurement
- High precision 180° angle sensor
- Typical angular error of ±0.1°
- Low output noise of 850 μV rms
- Sine and cosine differential outputs
- Ratiometric analog voltage outputs
- Negligible hysteresis
- SAR or Σ-Δ ADC compatible
- Temperature compensated AMR bridge
- Industrial temperature range: −40°C to +125°C
- Automotive temperature range: −40°C to +150°C
- EMI resistant
- Fault diagnostics
- VDD from 2.7 V to 5.5 V
- Minimal phase error of 0.85° at 30,000 rpm
- AEC-Q100 qualified for automotive applications
- Single chip solution
- Available in an 8-lead SOIC package
Product Details
The ADA4570 is an anisotropic magnetoresistive (AMR) sensor with integrated signal conditioning amplifiers and analog-to-digital converter (ADC) drivers. The ADA4570 produces two differential analog outputs that indicate the angular position of the surrounding magnetic field.
The ADA4570 consists of two die within one package, an AMR sensor, and a fixed gain instrumentation amplifier. The ADA4570 delivers amplified differential cosine and sine output signals, with respect to the angle, when the magnetic field is rotating in the x-axis and the y-axis (x-y) plane. 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 complete rotation of a dipole magnet produces two periods on the sinusoidal outputs. Therefore, the magnetic angle (α) calculated from the SIN and COS differential outputs represents the physical orientation of the magnet with respect to the ADA4570 in the 0° to 180° measurement range. Within a homogeneous field in the x-y plane, the output signals of the ADA4570 are independent of the physical placement in the z direction (air gap).
The ADA4570 is 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
Product Lifecycle
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.
Evaluation Kits (1)
Documentation & Resources
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How to Design Motor Encoders for Next-Generation Sustainable Applications6/1/2023 Analog Dialogue
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Driving Higher Levels of Flexibility, Productivity, and Sustainability in Smart Manufacturing10/27/2021 Thought Leadership
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADA4570BRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADA4570BRZ-R7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADA4570BRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADA4570WHRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADA4570WHRZ-R7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| ADA4570WHRZ-RL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
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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.