AS5243

Description

The AS5243 is a contactless magnetic angle encoder for accurate measurement up to 360° and includes 2 AS5143 devices in a punched stacked leadframe.

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

The AS5243 provides a digital 10-bit as well as a programmable analog output that is directly proportional to the angle of a magnet, rotating over the chip.

The analog output can be configured in many ways including user programmable angular range, adjustable output voltage range, voltage or current output, etc.

An internal voltage regulator allows operation of the AS5243 from 3.3V or 5.0V supplies.

The AS5243 is fully automotive qualified to AEC-Q100, grade 1.

Key Features

• User programmable zero position
• Digital serial 10-bit absolute output
• 10-bit analog output with programmable angle down to 0.088°/step
• Failure detection mode for magnet field strength and loss of power supply
• Serial read-out of multiple interconnected AS5243 devices using daisy chain mode
• Mode input for optimizing noise vs. speed
• Alignment mode for magnet placement guidance
• Wide temperature range: -40°C to 125°C
• Small package: QFN32LD (7x7)
• Unique Chip Identifier

Applications

The AS5243 is ideal for applications with an angular travel range from a few degrees up to a full turn of 360°, such as

Automotive applications:

• Throttle position sensors
• Gas / brake pedal position sensing
• Headlight position control
• Contactless rotary position sensing
• Front panel rotary switches
• Replacement of potentiometer

Block Diagram