Hardware
Documentation
Data Sheet
HAL 805
Programmable Linear
Hall-Effect Sensor
®
Edition Feb. 14, 2006
6251-513-3DS
HAL 805
Copyright, Warranty, and Limitation of Liability
The information and data contained in this document
are believed to be accurate and reliable. The software
and proprietary information contained therein may be
protected by copyright, patent, trademark and/or other
intellectual property rights of Micronas. All rights not
expressly granted remain reserved by Micronas.
Micronas assumes no liability for errors and gives no
warranty representation or guarantee regarding the
suitability of its products for any particular purpose due
to these specifications.
By this publication, Micronas does not assume respon-
sibility for patent infringements or other rights of third
parties which may result from its use. Commercial con-
ditions, product availability and delivery are exclusively
subject to the respective order confirmation.
Any information and data which may be provided in the
document can and do vary in different applications,
and actual performance may vary over time.
All operating parameters must be validated for each
customer application by customers’ technical experts.
Any new issue of this document invalidates previous
issues. Micronas reserves the right to review this doc-
ument and to make changes to the document’s content
at any time without obligation to notify any person or
entity of such revision or changes. For further advice
please contact us directly.
Do not use our products in life-supporting systems,
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agreed to otherwise in writing between the parties,
Micronas’ products are not designed, intended or
authorized for use as components in systems intended
for surgical implants into the body, or other applica-
tions intended to support or sustain life, or for any
other application in which the failure of the product
could create a situation where personal injury or death
could occur.
No part of this publication may be reproduced, photo-
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without the express written consent of Micronas.
Micronas Trademarks
– HAL
DATA SHEET
Third-Party Trademarks
All other brand and product names or company names
may be trademarks of their respective companies.
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Feb. 14, 2006; 6251-513-3DS
Micronas
DATA SHEET
HAL 805
Contents
Page
4
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6
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8
10
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11
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17
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30
Section
1.
1.1.
1.2.
1.3.
1.3.1.
1.4.
1.5.
1.6.
1.7.
2.
2.1.
2.2.
2.3.
2.3.1.
2.3.2.
3.
3.1.
3.2.
3.3.
3.4.
3.4.1.
3.5.
3.6.
3.7.
3.8.
3.9.
4.
4.1.
4.2.
4.3.
4.4.
4.5.
4.6.
5.
5.1.
5.2.
5.3.
5.4.
5.5.
5.6.
6.
Title
Introduction
Major Applications
Features
Marking Code
Special Marking of Prototype Parts
Operating Junction Temperature Range (T
J
)
Hall Sensor Package Codes
Solderability
Pin Connections and Short Descriptions
Functional Description
General Function
Digital Signal Processing and EEPROM
Calibration Procedure
General Procedure
Calibration of the Angle Sensor
Specifications
Outline Dimensions
Dimensions of Sensitive Area
Position of Sensitive Areas
Absolute Maximum Ratings
Storage and Shelf Life
Recommended Operating Conditions
Characteristics
Magnetic Characteristics
Open Circuit Detection
Typical Characteristics
Application Notes
Application Circuit
Use of two HAL805 in Parallel
Temperature Compensation
Undervoltage Behavior
Ambient Temperature
EMC and ESD
Programming of the Sensor
Definition of Programming Pulses
Definition of the Telegram
Telegram Codes
Number Formats
Register Information
Programming Information
Data Sheet History
Micronas
Feb. 14, 2006; 6251-513-3DS
3
HAL 805
Programmable Linear Hall Effect Sensor
Release Note: Revision bars indicate significant
changes to the previous edition.
DATA SHEET
easily be done with a PC and the application kit from
Micronas.
The sensor is designed for hostile industrial and auto-
motive applications and operates with typically 5 V
supply voltage in the ambient temperature range from
−40
°C up to 150 °C. The HAL805 is available in the
very small leaded packages TO92UT-1 and
TO92UT-2.
1. Introduction
The HAL805 is a recent member of the Micronas fam-
ily of programmable linear Hall sensors. It offers open-
circuit detection and individual programming of differ-
ent sensors which are in parallel to the same supply
voltage.
The HAL805 is an universal magnetic field sensor with
a linear output based on the Hall effect. The IC is
designed and produced in sub-micron CMOS technol-
ogy and can be used for angle or distance measure-
ments if combined with a rotating or moving magnet.
The major characteristics like magnetic field range,
sensitivity, output quiescent voltage (output voltage at
B = 0 mT), and output voltage range are programma-
ble in a non-volatile memory. The sensor has a ratio-
metric output characteristic, which means that the out-
put voltage is proportional to the magnetic flux and the
supply voltage.
The HAL805 features a temperature-compensated
Hall plate with choppered offset compensation, an A/D
converter, digital signal processing, a D/A converter
with output driver, an EEPROM memory with redun-
dancy and lock function for the calibration data, a
serial interface for programming the EEPROM, and
protection devices at all pins. The internal digital signal
processing is of great benefit because analog offsets,
temperature shifts, and mechanical stress do not
degrade the sensor accuracy.
The HAL805 is programmable by modulating the sup-
ply voltage. No additional programming pin is needed.
The easy programmability allows a 2-point calibration
by adjusting the output voltage directly to the input sig-
nal (like mechanical angle, distance, or current). Indi-
vidual adjustment of each sensor during the cus-
tomer’s manufacturing process is possible. With this
calibration procedure, the tolerances of the sensor, the
magnet, and the mechanical positioning can be com-
pensated in the final assembly. This offers a low-cost
alternative for all applications that presently need
mechanical adjustment or laser trimming for calibrating
the system.
In addition, the temperature compensation of the Hall
IC can be fit to all common magnetic materials by pro-
gramming first and second order temperature coeffi-
cients of the Hall sensor sensitivity. This enables oper-
ation over the full temperature range with high
accuracy.
The calculation of the individual sensor characteristics
and the programming of the EEPROM memory can
1.1. Major Applications
Due to the sensor’s versatile programming character-
istics, the HAL805 is the optimal system solution for
applications such as:
– contactless potentiometers,
– angle sensors,
– distance measurements,
– magnetic field and current measurement.
1.2. Features
– high-precision linear Hall effect sensor with
ratiometric output and digital signal processing
– multiple programmable magnetic characteristics in a
non-volatile memory (EEPROM) with redundancy
and lock function
– open-circuit detection (ground and supply line break
detection)
– for programming an individual sensor within several
sensors in parallel to the same supply voltage, a
selection can be done via the output pin
– temperature characteristics are programmable for
matching all common magnetic materials
– programmable clamping function
– programming through a modulation of the supply
voltage
– operates from
−40
°C up to 150 °C
ambient temperature
– operates from 4.5 V up to 5.5 V supply voltage in
specification and functions up to 8.5 V
– operates with static magnetic fields and dynamic
magnetic fields up to 2 kHz
– overvoltage and reverse-voltage protection at all
pins
– magnetic characteristics extremely robust against
mechanical stress
– short-circuit protected push-pull output
– EMC and ESD optimized design
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Feb. 14, 2006; 6251-513-3DS
Micronas
DATA SHEET
HAL 805
1.5. Hall Sensor Package Codes
HALXXXPA-T
Temperature Range: A or K
Package: UT for TO92UT-1/-2
Type: 805
Example:
HAL805UT-K
→
Type:
805
→
Package:
TO92UT
→
Temperature Range: T
J
=
−40°C
to +140°C
Hall sensors are available in a wide variety of packag-
ing versions and quantities. For more detailed informa-
tion, please refer to the brochure: “Hall Sensors:
Ordering Codes, Packaging, Handling”.
1.3. Marking Code
The HAL805 has a marking on the package surface
(branded side). This marking includes the name of the
sensor and the temperature range.
Type
Temperature Range
A
HAL805
805A
K
805K
1.3.1. Special Marking of Prototype Parts
Prototype parts are coded with an underscore beneath
the temperature range letter on each IC. They may be
used for lab experiments and design-ins but are not
intended to be used for qualification tests or as produc-
tion parts.
1.6. Solderability
1.4. Operating Junction Temperature Range (T
J
)
The Hall sensors from Micronas are specified to the
chip temperature (junction temperature T
J
).
A:
TJ =
−40
°C to +170 °C
K:
TJ =
−40
°C to +140 °C
The relationship between ambient temperature (T
A
)
and junction temperature is explained in Section 4.5.
on page 24.
During soldering reflow processing and manual
reworking, a component body temperature of 260 °C
should not be exceeded.
Solderability is guaranteed for one year from the date
code on the package.
1.7. Pin Connections and Short Descriptions
Pin
No.
1
2
3
Pin Name
V
DD
GND
OUT
OUT
Type
IN
Short Description
Supply Voltage and
Programming Pin
Ground
Push Pull Output
and Selection Pin
1
V
DD
OUT
3
2
GND
Fig. 1–1:
Pin configuration
Micronas
Feb. 14, 2006; 6251-513-3DS
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