ams OSRAM AS5070 On-Axis Magnetic Angular Position Sensors

ams OSRAM AS5070 On-Axis Magnetic Angular Position Sensors are high-resolution, Hall-based rotary magnetic position sensors that utilize CMOS technology and provide precise absolute angle measurements. The AS5070 is available with an analog output interface (AS5070A) or a digital output interface (AS5070B). The AS5070B can be programmed as a PWM or a SENT-compliant output interface. These sensors measure the orthogonal component of the flux density (Bz) over a full turn rotation and compensate for external stray magnetic fields with a robust architecture based on a 14-bit sensor array and analog front-end (AFE). A sub-range can be programmed to achieve ideal application resolution.

A simple two-pole magnet rotating over the center of the package is required to measure the angle. The magnet may be placed above or below the device. The absolute angle measurement provides an instant indication of the magnet’s angular position. The AS5070 operates at a supply voltage of 5V, and the supply and output pins are protected against overvoltage up to +20V. In addition, the supply pins are protected against reverse polarity up to -20V.

Features

• Hall-based rotary magnetic position sensor using CMOS technology
• Resolvessmall angular excursion with high accuracy
• 12-bit resolution at 90° minimum arc
• Low output noise, low inherent INL
• Magnetic stray field immunity
• Programmable output
• CORDIC block (Coordinate-Rotation Digital Computer)
• High durability and low system costs
• Embedded linearization algorithm
• 3x output interfaces
  • Analog ratiometric (AS5070A)
  • Digital PWM (AS5070B)
  • SENT (AS5070B)

Specifications

• Operating
  • 4.5V to 5.5V supply voltage range
  • 3.3V to 3.6V regulated voltage range
  • Supply current range
    • 4mA to 12mA for the AS5070A
    • 4mA to 10mA for the AS5070B
  • 2.5mA to 10mA start-up supply current at 2.25V
  • 10ms start-up time
• Electrical
  • 14-bit core resolution
  • 12-bit analog (AS5070A) and digital (AS5070B) resolutions
  • ±0.5° to ±0.9° integral non-linearity (optimum) range
  • ±1.4° integral non-linearity
  • 125µs typical sampling time
• Magnet
  • Orthogonal magnet field strength
    • 30mT to 70mT range
    • 10mT to 90mT in extended mode
  • 0.5mm typical displacement radius
• Power management, supply monitor, and timing
  • Undervoltage thresholds
    • 3.5V_DD to 4.5V_DD upper range
    • 3.0V_DD to 4.0V_DD lower range
  • 300mV to 900mV undervoltage hysteresis, 500mV typical
  • 10µs to 250µs undervoltage detection/recovery time range, 50µs typical
  • Overvoltage threshold
    • 6.0V to 7.0V upper range
    • 5.5V to 6.5V lower range
  • 300V to 900V overvoltage hysteresis range, 500V typical
  • 500µs to 2000µs overvoltage detection/recovery time range
  • 12ms maximum WatchDog error detection time

Block Diagram

more information: https://ams.com/en/as5070