ADA4571 Integrated AMR Angle Sensor and Signal Conditioner
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.
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
Features and Benefits- High precision 180° angle
- Maximum angular error of 0.5°
- Analog sine and cosine outputs
- Ratiometric output voltages
- Low thermal and lifetime drift
- SAR or Σ-Δ 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
| Automotive- Powertrain Body and Chassis
Reference Designs |
Data Sheets
Application Notes
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADA4571BRZ Production | 8 ld SOIC | OTH 98 | -40 to 125C | 2.05 | 1.2 | Y |
| ADA4571BRZ-R7 Production | 8 ld SOIC | REEL 1000 | -40 to 125C | 0 | 1.2 | Y |
| ADA4571BRZ-RL Production | 8 ld SOIC | REEL 2500 | -40 to 125C | 0 | 1.2 | Y |
| ADA4571WHRZ-R7 Production | 8 ld SOIC | REEL 1000 | -40 to 150C | 0 | 1.5 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| ADA4571R-EBZ | Evaluation Board for 8-lead SOIC Package | 95 | Y |
Reference Materials
