The HAL 28xy family is a new generation of programmable Hall-effect sensors.
It consists of members with different digital interfaces, like LIN, PWM, and SENT (SAE J2716). Due to its internal structure, it is possible to easily generate new family members. The built-in RISC processor allows a fast implementation of new output formats or customer-specific signal processing. All members within this family can be programmed without any additional programming pin. Programming is done via LIN frames or BiPhase-M telegrams depending on the family member.

Features
◆ High-precision linear Hall-effect sensor
◆ Spinning-current offset compensation
◆ Built-in temperature sensor
◆ Built-in RISC processor
◆ Digital signal processing
◆ Up to 12 bit resolution
◆ Customer-programmable temperature compensation of Hall sensitivity (2nd order) and Hall offset (1st order)
◆ Operating junction temperature range: −40 °C up to 170 °C
◆ Different interface options: – LIN 2.0 – SENT – PWM output up to 2 kHz
◆ Magnetic characteristics extremely robust against mechanical stress
◆ Non-volatile EEPROM with redundancy and lock function

Major Applications
Due to the sensors’ versatile programming characteristics and low drifts, the HAL 28xy family is the optimal system solution for applications such as
◆ Contactless potentiometers
◆ Angular measurements (e.g. for fuel-level sensing)
◆ Linear movement (e.g. seat track position)
◆ Linear force or torque measurements
◆ Current sensing