SS1101
Unipolar Hall Switch-Low Sensitivity
1 V3.10 Nov 1, 2013
Features and Benefits
– 3.5V to 24V Operation
– -40°C to 150°C Superior temperature operation
– CMOS technology
– Low current consumption
– Chopper-stabilized amplifier stage
– Open drain output
– Low sensitivity
– Small Size SOT23 3L or SIP 3L
– Both RoHS compliant packages
Application Exa mples
– Automotive, Consumer and Industrial
– Solid-state switch
– Brushless DC motor commutation
– Speed detection
– Angular position detection
– Proximity detection
– Current detector
3 pin SOT 23 (suf f ix SO) 3 pin SIP ( suffi x UA)
Functional Bloc k Diagram
V
DD
OUT
Voltage
Regulator
Chopper
Hall
Plate
GND
SIP Package SOT Package
Pin 1 – V
DD
Pin 1 – V
DD
Pin 2 – GND P in 2 – OUT
Pin 3 – OUT P in 3 – GND
SS1101
Unipolar Hall Switch-Low Sensitivity
2 V3.10 Nov 1, 2013
General Description
The SS1101 is a unipolar Ha ll-effect se nsor IC fab-
ricated from CMOS technology. The device inte-
grates a voltage regulator, Hall sensor with dy-
namic offset cancellation system, small signal am-
plifier, Schmitt trigger and an open-drain output
driver. With suitable output pull up, they can be
us ed with b ip o l ar or CM OS logic c i r c u i t s.
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
unipolar switching characteristic makes these de-
vic es id ea l for us e wit h a si mpl e ba r or r od ma gn et.
Thanks to its wide operating voltage range a nd ex-
tended choice of temperature range, it is quite suit-
a bl e for us e i n aut o mot ive , i nd ust ri a l a nd consumer
applications.
The device is delivered in a Small Outline Tran-
sistor (SOT) or in a Plastic Single In Line (SIP 3L
flat). Both 3-lead packages are RoHS compliat.
Glossary of Terms
MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss
RoHS R e st ri ct io n of H a za rdous S ub st anc 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)