AS5161 Rotary Position Sensor

12-bit Rotary Position Sensor with Digital Interface

Datasheet: Download Send as Email

Description

The AS5161 is a contactless Hall-based magnetic position sensor for very accurate angular measurement over a full turn of 360°. A sub range can be programmed to achieve the best output characteristic for the application. A simple diametrical 2-pole magnet rotating on the center of the IC is required: the magnet may be placed above or below the IC.

The AS5161 is a compact integrated solution which provides the absolute angle measurement with a resolution of 0.09° over a full revolution as PWM output signal. The internal 14-bit core of the AS5161 enables a fine programming of the start and stop positions with a resolution of 0.02° to allow the finest system mechanical adjustments. High level of flexibility is guaranteed by the programmability through the UART interface shared with the output pin, to reduce the number of pins in the application. The angular output data can be linearized in the final production to further increase the precision of the measurement. With embedded overvoltage protection and reverse battery protection the AS5161 can fulfill the most demanding automotive safety standard.

Key Features

14-bit core resolution for fine user programming of the start and stop position
12-bit resolution PWM output signal
User programmable clamping, diagnostic levels and transition point
Multiple slope output characteristic
Overvoltage, short-circuit and reverse battery protections
High driving capability of resistive and capacitive loads
Broken GND and VDD detection over a wide range of different load conditions
Simple programming by provided programming hardware and software
Failure detection mode for magnet placement monitoring and loss of power supply, indication of high voltage condition
Wide temperature range: -40°C to +150°C
Package: SOIC8