Honeywell VM Series AMR Speed & Direction Sensor ICs

Honeywell VM Series AMR (Anisotropic Magneto Resistive) Speed and Direction Sensor ICs are available as 2-pin and 4-pin Integrated Circuits (ICs) designed to detect the speed and direction of a ring magnet encoder target. The 2-pin current interface also includes the variant of Pulse Width Modulated (PWM) to detect speed with direction. These AMR sensors feature a high-sensitivity AMR bridge array that operates with a larger air gap than hall-effect sensor ICs, allowing for enhanced design flexibility and assembly tolerances. The VR series AMR ICs can operate within the temperature range from -40°C to 150°C with the supply current up to 20mA. Honeywell VM series AMR ICs can be used in speed and position sensing in transmissions, engine cranks, wheel speed measurement, integrated bearings seals, and for shaft speed measurement in pumps, motors, or compressors.

Features

  • 4-pin quadrature, open collector outputs
  • ESD-protected, ISO-26262, and AECQ100-H (only 2-pin sensor ICs)
  • Insensitive to mechanical vibration
  • Integrated 2-pin speed sensor IC - VM721V1
  • Integrated 2-pin speed and direction sensor IC - VM721D1
  • Integrated quadrature sensor IC - VM821Q1
  • No calibration is required
  • Pole size independent operation
  • Protection against reverse polarity and short circuit
  • Zero speed operation

Applications

  • Conveyer rollers speed, process line speed, and direction
  • Electric actuated blind position
  • Encoders
  • Fan speed systems
  • Garage door opening systems
  • Gearbox output speed
  • Induction motors
  • Industrial speed and direction with position feedback
  • Integrated seals and bearings
  • Positioning roller speed and direction
  • Pumps and compressors

Technical Specifications

Parameter  Values
2-Pin Sensor ICs  4-Pin Sensor ICs
Maximum supply voltage 9V @150°C 24V
24V
Supply current digital high state 16mA 20mA
digital low state 8mA
Output switching time  8µs 1.5µs
Operating temperature range -40°C to 150°C