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AS5048A/AS5048B

Magnetic Rotary Encoder

14-bit Angular Position Sensor

Datasheet

General Description

The AS5048 is an easy to use 360° angle position sensor with a 14-bit high resolution output. The maximum system

accuracy is 0.05° assuming linearization and averaging is done by the external microcontroller.

The 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. This helps developers to shorten their developing time. The

sensor tolerates misalignment, air gap variations, temperature variations and as well external magnetic fields. This

robustness and 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 daisy chain for serial

data read out. 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 a SPI interface, AS5048B I2C interface.

Both devices offer a PWM output. An internal voltage regulator allows the AS5048 to operate at either 3.3 V or 5 V

supplies.

Key Features & Benefits

• 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

• 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

• 14-pin TSSOP package (5x6.4mm)

Applications

• Robotic joint position detection

• Industrial motor position control

• Medical robots and fitness equipment

Block Diagram