In automotive drive-by-wire applications
Use of small magnets and space saving possible

ams announced the new AS5200L, a dual-die magnetic rotary position sensor supporting an I2C interface to help reduce component footprint in automotive applications.

The AEC-Q100 Grade 1 quality AS5200L belongs to ams’ comprehensive family of magnetic position sensors. It supports electronic powertrain drive-by-wire control functions, such as shift-by-wire for both traditional manual transmissions and modern electronic transmissions, as well as a unique set of features focused on pedal applications.

ams has further enhanced its traditional high-performance, high-reliability position sensing technology with the AS5200L, which uses dual dies. Because the two dies are stacked, both dies can be operated by a single small target magnet, and ideal output measurements can be provided from each die. Separate package pins are provided for the two dies within a package to prevent electrical errors of the device from affecting both dies.
Like all other ams magnetic position sensors, the AS5200L is inherently resistant to stray magnetic fields and consistently provides highly accurate measurement results even in noisy magnetic environments. Therefore, since there is no need to add the shielding features typically required by competitor magnetic position sensor ICs, users can secure highly reliable performance while reducing system costs.

The AS5200L is supplied in an MLF-16 package with a space-saving footprint of 5mm x 5mm, and includes exposed pads and wettable flanks in the package to enable quick and easy board-level solder joint inspection. The AS5200L is ideal for automotive system designers seeking to implement robust and accurate rotational position sensing capabilities in automotive electronics applications where available space is very limited, such as gear shifters and pedals, or in many other non-contact potentiometer applications like knobs and joysticks.

Because it provides an I2C interface, operating parameters can be easily programmed via a host microcontroller without the need for a dedicated programmer. The AS5200L can provide angle measurements via the I2C interface or as a PWM signal. Angle measurements are provided with 12-bit resolution, and the maximum error range that may affect inherent nonlinearity is ±1°. The AS5200L has low power consumption in both operating and standby modes. Smart Low Power mode automatically reduces power consumption, with current consumption averaging only 1.5mA per 100ms of polling.

This sensor is basically designed to measure rotations from 0° to 360°. Measurement values in a smaller range can be set by programming the start/stop position in the one-time programmable (OTP) memory embedded in the chip.

Thomas Mueller, Director of Position Sensor Marketing at ams, stated, “The AS5200L provides the perfect solution for automotive embedded applications where high accuracy, redundancy, and a very small footprint are high priorities and safety is critical. The dual-die AS5200L, which supports redundant high-resolution 12-bit I2C or PWM output, is ideal for shift-by-wire applications in hybrid vehicles, battery-powered electric vehicles, and conventional internal combustion engine vehicles. Thanks to this outstanding performance and redundancy, the AS5200L enables automotive OEMs to achieve ASIL D ratings at the system level.”