ams OSRAM AS5048 Magnetic Rotary Encoders

ams OSRAM AS5048 Magnetic Rotary Encoders are easy to use 360° angle position sensors with 14-bit high-resolution output. The maximum system accuracy is 0.05° assuming linearization and averaging is done by the external microcontroller. The AS5048 IC measures the absolute position of the magnet’s rotation angle and consists of Hall sensors, analog-digital converter, and digital signal processing. The zero position can be programmed via SPI or I²C command, therefore no programmer is needed anymore. This simplifies the assembly of the complete system because the zero position of the magnet does not need to be mechanically aligned which helps developers to shorten their developing time. The sensor tolerates misalignment, air gap variations, temperature variations, and as well as external magnetic fields. This robustness and the wide temperature range (-40°C up to +150°C) of the AS5048 makes the IC ideal for rotation angle sensing in harsh industrial and medical environments. Several AS5048 ICs can be connected in a daisy chain for serial data readout. The absolute position information of the magnet is directly accessible over a PWM output and can be read out over a standard SPI or a high-speed I²C interface. AS5048A has an SPI interface, AS5048B I2C interface, and both devices offer a PWM output. An internal voltage regulator allows the AS5048 to operate at either 3.3V or 5V supplies.


  • 360° contactless angle position sensor
  • Standard SPI or high-speed I²C interface
  • Pulse width modulated output (PWM)
  • Simple programmable zero position via SPI or I²C command
  • No programmer needed
  • 14-bit full-scale resolution 0.0219°/LSB
  • 14-pin TSSOP package (5mm x 6.4mm)
  • Angle accuracy 0.05° after system linearization and averaging
  • Daisy chain capability
  • Tolerant to air gap variations magnetic field input range: 30mT – 70mT
  • -40°C to +150°C ambient temperature range
  • 3.3V/5V compliant


  • Robotic joint position detection
  • Industrial motor position control
  • Medical robots and fitness equipment

Block Diagram

Block Diagram - ams OSRAM AS5048 Magnetic Rotary Encoders
Published: 2013-10-03 | Updated: 2022-03-11