Magnetic-encoder IC detects rotation or tilt, with pushbutton capability

A 12-bit magnetic-encoder, introduced by austriamicrosystems, is capable of sensing rotational position or angular tilt, as well as supporting pushbutton operation, allowing designers to reduce the size and increase the functionality of devices such as joysticks and navigational knobs.

The AS5046 is a complete system-on-chip including Hall sensors, front-end amplifiers, ADCs and signal processing. When used with an axiallypolarised magnet, the AS5046 detects the angle of tilt, which enables compact joystick controls for a variety of industrial and professional instruments.

Using the AS5046 with a diametrically-polarised magnet enables accurate angular-position sensing up to 360°. The distance of the magnet from the sensor is also detected, which allows implementation of pushbutton functions.

A programmable ratiometric analogue output is provided, as well as an I²C interface, allowing standalone connection or integration with a host microcontroller.

Further on-chip features include an internal 3.3V LDO voltage regulator, enabling direct operation from a 3.3V or 5.0V supply. In addition, integrated conditioning circuitry for the Hall sensors allows the device to tolerate magnet misalignment and external magnetic fields.

 

FEATURES User-programmable zero position User-programmable full-scale angular range 8-bit magnet-distance resolution Operating temperature range: -40°C to 125°C SSOP-16 package

APPLICATIONS Industrial controls Navigational knobs Rotate-and-push manual-input devices Multi-axis manual-input devices Remote sensors

 

 

 

 

• International Rectifier’s IRS200x drivers, page 070911
• National Semiconductor’s, ADC14DS105 dual ADC, page 070926
• National Semiconductor’s, LMH6552 amplifier, page 070932

 

www.austriamicrosystems.com/03products/20_rotary_encoders.htm