PRODUCT INFORMATION
HAL 2830
May/2008
®
HAL 2830
Linear Hall-Effect Sensor with SENT Output
The HAL 2830 is a new member of the
Micronas varioHAL (HAL 28xy) family of
programmable linear Hall-effect sensors.
It features a digital SENT interface
(SingleEdgeNibbleTransmission)
that
enables a fast and robust data transfer in
harsh automotive environments.
The implementation of the interface com-
plies with the SAE J2716 SENT standard.
Each message consists of a sequence of
pulses. In one protocol, the sensor trans-
mits the magnetic field information, a status
information of the sensor, and for safety
reasons a CRC checksum.
The HAL 2830 features a Hall-plate with
spinning current offset compensation tech-
nique and a precise temperature sensor
which is used for temperature compensa-
tion of both the Hall-sensors sensitivity and
offset.
The sensor provides digital signal process-
ing. This is of great benefit because analog
offsets, temperature shifts, and mechanical
stress do not degrade 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 2830 is available in the very small
leaded package TO-92UT.
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Sample accurate transmission
Telegram length less than 360 µs at 2 µs
tick time
12-bit resolution
Non-volatile EEPROM with redundancy
and lock function
Open-drain output with slew rate control
Transmission of temperature information
Individual serial number for each sensor
12-bit customer serial number
Features
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High-precision linear Hall-effect sensor
Spinning-current offset compensation
Built-in temperature sensor
On-board diagnostics (overtemperature,
overcurrent, etc.)
Customer-programmable temperature
compensation of output sensitivity (2
nd
order) and output offset (1
st
order)
Operating junction temperature range:
−40
°C…170 °C.
Magnetic characteristics extremely
robust against mechanical stress
Digital signal processing
Sampling rates up to 2 kHz with internal
low-pass filter
SENT output according to SAE J2716
standard
Message tick time customer-program-
mable between 2 µs and 17 µs
Low time customer-programmable
between 3 and 7 clock ticks
Three data nibbles for magnetic field
information
Major Applications
Due to the sensor’s versatile programming
characteristics and low drifts, the HAL 2830
is the optimal system solution for applica-
tions such as:
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Contactless potentiometers
Angular measurements
(e.g. valve, throttle, pedal position)
Linear movement
(e.g. seat track position)
Linear force or torque measurements
Current sensing
(e.g. battery management)
MICRONAS [ MICRONAS ]
