HAL28XY Datasheet, PDF (1/2 Pages) Micronas – Linear Hall-Effect Sensor Family with Digital Interfaces

PRODUCT INFORMATION
HAL 28xy
Feb/2008
HAL^® 28xy
Linear Hall-Effect Sensor Family with Digital Interfaces
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 pro-
cessing. All members within this family can
be programmed without any additional pro-
gramming pin. Programming is done via LIN
frames or BiPhase-M telegrams depending
on the family member.
The HAL 28xy family features a Hall plate
with spinning current offset compensation
technique and a precise temperature sen-
sor which is used for temperature compen-
sation of both the Hall sensors’ sensitivity
and offset.
The sensors’ signal path is handled by the
RISC processor. This is of great benefit
because analog offsets, temperature shifts,
and mechanical stress do not degrade the
digital signals.
Major characteristics like magnetic field
range, sensitivity, offset and the tempera-
ture coefficients of sensitivity and offset can
easily be adjusted to the magnetic circuit by
programming the non-volatile memory.
The HAL 28xy family is available in the very
small leaded package TO-92UT.
Features
V High-precision linear Hall-effect sensor
V Spinning-current offset compensation
V Built-in temperature sensor
V Built-in RISC processor
V Digital signal processing
V Up to 12 bit resolution
V Customer-programmable temperature
compensation of Hall sensitivity (2^nd
order) and Hall offset (1^st order)
V Operating junction temperature range:
−40 °C up to 170 °C
V Different interface options:
– LIN 2.0
– SENT
– PWM output up to 2 kHz
V Magnetic characteristics extremely
robust against mechanical stress
V 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
V Contactless potentiometers
V Angular measurements
(e.g. for fuel-level sensing)
V Linear movement
(e.g. seat track position)
V Linear force or torque measurements
V Current sensing