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 www.ams.com [email protected] © 11/2012 by ams Subject to change without notice Headquarters ams AG Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria Phone +43 3136 500-0 · Fax +43 3136 525-01 Sales Offices Worldwide [email protected] [email protected] [email protected]