Micronas HAL2830 Linear hall-effect sensor with sent output Datasheet

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.
The HAL 2830 is available in the very small
leaded package TO-92UT.
Features
It features a digital SENT interface
(SingleEdgeNibbleTransmission)
that
enables a fast and robust data transfer in
harsh automotive environments.
The implementation of the interface complies with the SAE J2716 SENT standard.
Each message consists of a sequence of
pulses. In one protocol, the sensor transmits 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 technique and a precise temperature sensor
which is used for temperature compensation of both the Hall-sensors sensitivity and
offset.
The sensor provides digital signal processing. 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 temperature coefficients of sensitivity and offset can
easily be adjusted to the magnetic circuit by
programming the non-volatile memory.
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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 (2nd
order) and output offset (1st order)
Operating junction temperature range:
−40 °C… 170 °C.
Magnetic characteristics extremely
robust against mechanical stress
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SENT output according to SAE J2716
standard
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Message tick time customer-programmable between 2 µs and 17 µs
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Three data nibbles for magnetic field
information
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
Due to the sensor’s versatile programming
characteristics and low drifts, the HAL 2830
is the optimal system solution for applications such as:
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Low time customer-programmable
between 3 and 7 clock ticks
Telegram length less than 360 µs at 2 µs
tick time
Major Applications
Sampling rates up to 2 kHz with internal
low-pass filter
Digital signal processing
Sample accurate transmission
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)
PRODUCT INFORMATION
HAL 2830
May/2008
Development Tools
For engineering and production purposes,
Micronas offers an easy-to-use application kit:
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Micronas programmer board
(HAL-APB V 1.3)
LabVIEWTM programming software for
Windows® 9x/2000/XP/Vista
Serial Port
LabVIEW VIs
HAL Programmer Board
Fig. 1: Development tool setup
System Architecture
The HAL 2830 sensors are produced in a
proven automotive submicron CMOS technology.
The HAL 2830 features a temperature-compensated Hall plate with spinning-current
offset compensation, an A/D converter for
the Hall-plate, an A/D converter for the temperature sensor, digital signal processing
(RISC processor), a digital SENT interface,
an EEPROM memory with redundancy and
lock function for the calibration data and the
SENT output configuration, and protection
devices on all pins.
The HAL 2830 is programmable by means
of BiPhase-M telegrams. No additional programming pin is needed. The sensor is programmed through its output pin.
VSUP
Internally
stabilized
Supply and
Protection
Devices
Temperature
Dependent
Bias
Oscillator
Switched
Hall Plate
A/D
Converter
Digital
Signal
Processing
Temperature
Sensor
A/D
Converter
Protection
Devices
SENT
Molule
Open-Drain
output with
slew rate
control
DIO
EEPROM Memory
Lock Control
GND
Fig. 2: Block diagram of the HAL 2830
All information and data contained in this product information are without any commitment, are not to be considered as an offer for conclusion of a contract, nor shall they be construed as to create any liability. Product or
development sample availability and delivery are exclusively subject to our respective order confirmation form. By
this publication, Micronas GmbH does not assume responsibility for patent infringements or other rights of third
parties which may result from its use.
No part of this publication may be reproduced, photocopied, stored on a retrieval system, or transmitted
without the express written consent of Micronas GmbH.
Edition May 2, 2008; Order No. PI000124_001EN
Micronas GmbH ⋅ Hans-Bunte-Strasse 19 ⋅ D-79108 Freiburg (Germany) ⋅ P.O. Box 840 ⋅ D-79008 Freiburg (Germany)
Tel. +49-761-517-0 ⋅ Fax +49-761-517-2174 ⋅ E-mail: [email protected] ⋅ www.micronas.com
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