Only a few passive components and a magnet rotating above the chip are necessary to assemble the encoder systems. The AS5055 performs all angle calculations as well as automatic power-up and power-down on–chip. It only draws current, when a new measurement is requested by the host controller. As soon as the acquisition of a measurement is completed, the AS5055 automatically suspends to power-down.
Josef Janisch, product marketing manager at austriamicrosystems, stated, “This is the industry’s smallest 12-bit magnetic rotary encoder available. It also offers the lowest power consumption due to automatic shutdown and wake-up modes. This is ideal for battery equipment, as it extends battery life. In addition, the industry standard SPI interface offers an easy-to-use connection to common microcontrollers.”
The AS5055 is available in a tiny 4×4 mm 16-pin QFN package, operates from a 3.3 volt power supply, and has an ambient operating temperature range of -20 to +85°C.