AS5046 - Magnetic rotary encoder with absolute digital and analog outputs

12-bit Programmable Angle Magnetic Rotary Encoder with Absolute 2-Wire Serial and Analog Interfaces

Description

The AS5046 is a contactless magnetic angle encoder for accurate measurement up to 360°.

It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing in a single device.

The AS5046 provides a digital serial 12-bit as well as a programmable 10-bit ratiometric analog output that is directly proportional to the angle of a magnet, rotating over the chip.

In addition, the serial interface enables a user configurable arrangement of the Hall array and allows access to each individual Sensor of the Hall Array. The AS5046 also provides high resolution information of the magnetic field strength, respectively the vertical distance of the magnet, thus adding excellent state-of-health information of the overall system.

An internal voltage regulator allows operation of the AS5046 from 3.3V or 5.0V supplies.

Key Features

360° contactless high resolution angular position encoding
User programmable zero position
12-bit 2-wire serial interface
Versatile analog output programmable angular range up to 360° programmable ratiometric output voltage range
High resolution magnet distance indication 256 steps within recommended range (~ 0.5mm to 1.8mm) 256 steps over extended range (~ 0mm to 5mm)
Mode input for optimizing noise vs. speed
Alignment mode for magnet placement guidance
Wide temperature range: -40°C to 125°C
Small package: SSOP-16 (5.3mm x 6.2mm)

Applications

The AS5046 is ideal for applications that require high resolution, a minimum of wires between controller and sensor and where the vertical distance of the magnet is of importance: