HAL401
Linear Hall Effect Sensor IC
in CMOS technology
Release Notes: Revision bars indicate significant
changes to the previous edition.
1. Introduction
The HAL 401 is a Linear Hall Effect Sensors produced in
CMOS technology. The sensor includes a temperature-
compensated Hall plate with choppered offset com-
pensation, two linear output stages, and protection de-
vices (see Fig. 2–1).
The output voltage is proportional to the magnetic flux
density through the hall plate. The choppered offset
compensation leads to stable magnetic characteristics
over supply voltage and temperature.
The HAL 401 can be used for magnetic field measure-
ments, current measurements, and detection of any me-
chanical movement. Very accurate angle measure-
ments or distance measurements can also be done. The
sensor is very robust and can be used in electrical and
mechanical hostile environments.
The sensor is designed for industrial and automotive ap-
plications and operates in the ambient temperature
range from –40
°C
up to 150
°C
and is available in the
SMD-package SOT89B-1.
1.1. Features:
– switching offset compensation at 147 kHz
– low magnetic offset
– extremely sensitive
– operates from 4.8 to 12 V supply voltage
– wide temperature range T
A
= –40
°C
to +150
°C
– overvoltage protection
– reverse voltage protection of V
DD
-pin
– differential output
– accurate absolute measurements of DC and low fre-
quency magnetic fields
– on-chip temperature compensation
1.2. Marking Code
Type
DATA SHEET
Temperature Range
A
K
401K
HAL401
401A
1.3. Operating Junction Temperature Range
The Hall sensors from Micronas are specified to the chip
temperature (junction temperature T
J
).
A:
T
J
= –40
°C
to +170
°C
K:
T
J
= –40
°C
to +140
°C
Note:
Due to power dissipation, there is a difference be-
tween the ambient temperature (T
A
) and junction
temperature. Please refer to section 4.1. on page
18 for details.
1.4. Hall Sensor Package Codes
HALXXXPA-T
Temperature Range: A or K
Package: SF for SOT89B-1
Type: 401
Example:
HAL401SF-K
→
Type: 401
→
Package: SOT89B-1
→
Temperature Range: T
J
= –40
°C
to +140
°C
Hall sensors are available in a wide variety of packaging
versions and quantities. For more detailed information,
please refer to the brochure: “Hall Sensors: Ordering
Codes, Packaging, Handling”.
4
Micronas
MICRONAS [ MICRONAS ]
