SS1103
Unipolar Hall-Effect Digital Switch
1 V3.10 Nov 1, 2013
Features and Benefits
– 4.5V to 24V O perati on
– -40°C to 150°C Superior temperature operation
– Bipolar technology
– Open-collector 25 mA output
– Reverse battery protection
– Small Size SOT23 3L
– Solid-state reliability
– Resistant to physical stress
– Activate with small, commercially available
Per manent magne ts
Applic ation Examples
– Automotive, Consumer and Industrial
– Solid-state switch
– Brushless DC motor commutation
– Spee d detect i on
– Linear position detection
– Angular position detection
– Proximity detection
3 pin SO T23 (suf f ix SO)
V
DD
OUT
Voltage
Regulatr
Chopper
Hall
Plate
GND
SOT Package
Pin 1 – V
DD
Pin 2 – OUT
Pin 3 – GND
Functional Block Diagram
SS1103
Unipolar Hall-Effect Digital Switch
2 V3.10 Nov 1, 2013
General Description
The SS1103 is a unipola r Hall-effect se nsor IC fa b-
ricated from bipolar technology. The device inte-
grates a voltage regulator, reverse battery protec-
tion diode, Hall sensor with dynamic offset can-
cellation system, temperature compensation cir-
cuitry, small signal amplifier, Schmitt trigger and
an open-collector output to sink up to 25 mA.
With suitable out put pull up, they can be used wit h
bip ol a r or CMO S l o gic c i rc ui ts.
These Hall-effect switches are monolithic integrat-
ed circuits with tighter magnetic specifications, de-
signed to operate continuously over extended tem-
peratures to +150°C,and are more stable with both
temperature and supply voltage changes. The uni-
polar switching characteristic makes these devices
ideal for use with a simple bar or rod magnet.
Thanks to its wi de opera ting voltage r ange a nd ex-
tended choice of temperature range, it is quite suit-
able for use in automotive, industrial and consumer
applications.
Glossary of Terms
MilliTesla (mT), Gauss Un it s of magn e t ic flux de ns i ty: 1mT = 10 Gauss
RoHS Re s t r i ct ion of Ha za r dous S ub s tanc es
Operating Point (B
OP
) Magnetic flux density applied on the branded side of the package which turns the output
driver ON (V
OUT
= V
DSon
)
Release Point (B
RP
) Magnetic flux density applied on the branded side of the package which turns the output
driver OFF (V
OUT
= high)