HAL300
Differential Hall Effect Sensor IC
– operates with magnetic fields from DC to 10 kHz
in CMOS technology
– output turns low with magnetic south pole on branded
side of package and with a higher magnetic flux densi-
ty in sensitive area S1 as in S2
Introduction
– on-chip temperature compensation circuitry mini-
mizes shifts of the magnetic parameters over temper-
ature and supply voltage range
The HAL300 is a differential Hall switch produced in
CMOS technology. The sensor includes 2 temperature-
compensated Hall plates (2.05 mm apart) with active off-
set compensation, a differential amplifier with a Schmitt
trigger, and an open-drain output transistor (see Fig. 2).
– the decrease of magnetic flux density caused by rising
temperature in the sensor system is compensated by
a built-in negative temperature coefficient of hystere-
sis
The HAL300 is a differential sensor which responds to
spatial differences of the magnetic field. The Hall volt-
– EMC corresponding to DIN 40839
ages at the two Hall plates, S and S , are amplified with
1
2
a differential amplifier. The differential signal is
compared with the actual switching level of the internal
Schmitt trigger. Accordingly, the output transistor is
switched on or off.
Marking Code
Type
Temperature Range
E
The sensor has a bipolar switching behavior and re-
A
C
quires positive and negative values of ∆B = B – B for
S1
S2
correct operation.
HAL300SO,
HAL300UA
300A
300E
300C
The HAL300 is an ideal sensor for applications with a ro-
tating multi-pole-ring in front of the branded side of the
package (see Fig. 4 and Fig. 5), such as ignition timing,
anti-lock brake systems, and revolution counting.
Operating Junction Temperature Range (T )
J
A: T = –40 °C to +170 °C
For applications in which a magnet is mounted on the
backsideofthepackage(back-biasedapplications), the
HAL320 is recommended.
J
E: T = –40 °C to +100 °C
J
C: T = 0 °C to +100 °C
J
The active offset compensation leads to constant mag-
netic characteristics over supply voltage and tempera-
ture.
The relationship between ambient temperature (T ) and
A
junction temperature (T ) is explained on page 11.
J
The sensor is designed for industrial and automotive ap-
plications and operates with supply voltages from 4.5 V
to 24 V in the ambient temperature range from –40 °C
up to 150 °C.
Hall Sensor Package Codes
HALXXXPA-T
Temperature Range: A, E, or C
The HAL300 is available in a SMD-package (SOT-89A)
and in a leaded version (TO-92UA).
Package: SO for SOT-89A,
UA for TO-92UA
Type: 300
Features:
Example: HAL300UA-E
– distance between Hall plates: 2.05 mm
– operates from 4.5 V to 24 V supply voltage
– switching offset compensation at 62 kHz
– overvoltage protection
→ Type: 300
→ Package: TO-92UA
→ Temperature Range: T = –40 °C to +100 °C
J
Hall sensors are available in a wide variety of packaging
versions and quantities. For more detailed information,
please refer to the brochure: “Ordering Codes for Hall
Sensors”.
– reverse-voltage protection at V -pin
DD
– short-circuit protected open-drain output by thermal
shutdown
2
Micronas
MICRONAS [ MICRONAS ]
