Austriamicrosystems ups magnetic encoder accuracy
Austriamicrosystems has a 14-bit magnetic encoder IC which provides a PWM output and either an SPI or I2C interface, supplies absolute angle measurements to a host microcontroller.
“The application’s mechanical design does not need to allow for precise initial alignment of the sensor IC and the two-pole magnet it is paired with: instead, the zero position is programmed into the AS5048 one time only on assembly, via a simple SPI or I2C command, with no requirement for a special programming device,” said the supplier.
The AS5048 is also designed to be tolerant of misalignment between the sensor IC and its paired magnet and of variations in the air gap, as well as of variations in temperature from -40°C to +150°C.
Measurement accuracy is improved and the IC’s measurement engine provides for resolution down to 0.0219°. With linearization and averaging implemented in the host microcontroller, it can deliver angle measurements accurate to 0.05°.
An internal voltage regulator enables the AS5048 to operate from either a 3.3V or 5V supply. It is available in a 14-pin TSSOP package. Multiple devices can be daisy-chained to produce a serial data read-out.