Factsheet

14-bit Resolution
www.ams.com/AS5048
AS5048 – Magnetic Rotary Position Sensor
- High resolution, high accuracy and repeatability
- ISP (in system programmable) zero position
- No external programmer needed
- Wide temperature range (-40°C to +150°C)
We provide innovative
analog solutions to
the most challenging
applications in sensor
and sensor interfaces,
power management,
and wireless.
General Description
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.
Version AS5048A comes with SPI and PWM Interface. Version AS5048B is configured
with the I²C interface and has also a PWM output. An internal voltage regulator allows
the AS5048 to operate at either 3.3 V or 5 V supplies.
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 any more. 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
Applications
Features
Robotics
- Motor control and joint position detection
-
Industry
- Motor position and motion control
- Potentiometer
Medical
- Surgical robots
- Injection pumps
- Fitness equipment
360° contactless angle position sensor
SPI and PWM or I²C and PWM interface
Simple programmable zero position via SPI or I²C command
No external programmer needed
0.0219°/ LSB 14-bit full scale resolution
Angle accuracy 0.05° after system linearization and averaging
Daisy chain capability
Wide magnetic field input range: 30mT – 70mT
Operating temperature -40°C up to +150°C
High reliability due to contactless sensing
Immune to external magnetic stray fields
3.3V or 5V compliant
14-pin TSSOP package
AS5048 Block Diagram
VDD5V
VDD
PWM
ADC
DSP
PWM
Control
Logic
µController
VDD3V
Hall Array
MISO / A2
SPI
MOSI / A1
I2C
GND
SCL / CLK
SDA / SS
GND
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Subject to change without notice
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