Magnetic rotary encoder IC with automatic power-down and wake-up modes

The new AS5055 magnetic rotary encoder from austriamicrosystems with automatic power-down and wake-up modes is targeted for low-power battery operated applications such as robotics. The AS5055 is suggested for position sensing applications requiring small size and high resolution. The AS5055 integrates four Hall sensor elements, a 12-bit angle encoder, power management controller and 3- or 4-wire SPI communications interface.
Depending on the readout rate, the current consumption is reduced to µA-levels, e.g. 50µA average at 10 measurements per second - the lowest in the industry, claims austriamicrosystems.

With less number of external passive components and with a magnet rotating above the chip, the AS5055 performs all angle calculations and automatic power-up and power-down on-chip. The current is drawn only when the host controller requests a new measurement. The AS5055 automatically suspends to power-down immediately after the measurement.

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 operates from a voltage of 3.3 volt with ambient operating temperature range of -20 to +85°C.

Package: 4x4 mm QFN package

Availability: Now
Price: 1.92 € (approximate $2.69 USD) in 10K pieces