S1101

S1101
Unipolar Hall Switch-Low Sensitivity
Features and Benefits
Application Examples
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3.5V to 24V Operation
-40℃ to 150℃ Superior temperature operation
CMOS technology
Low current consumption
Chopper-stabilized amplifier stage
Open drain output
Low sensitivity
Small Size-SOT23 3L and SIP 3L
both RoHS compliant packages
Automotive, Consumer and Industrial
Solid-state switch
Brushless DC motor commutation
Speed detection
Angular position detection
Proximity detection
Current detector
3 pin SOT23 (suffix SO)
3 pin SIP (suffix UA)
Functional Block Diagram
VDD
Voltage
Regulatr
OUT
Chopper
Hall
Plate
GND
SIP Package
Pin 1 – VDD
Pin 2 – GND
Pin 3 – OUT
SOT Package
Pin 1 – VDD
Pin 2 – OUT
Pin 3 – GND
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S1101
Unipolar Hall Switch-Low Sensitivity
General Descriptions
The S1101 is a unipolar Hall-effect sensor IC fabricated
from CMOS technology. The device integrates a voltage
regulator, Hall sensor with dynamic offset cancellation
system, small signal amplifier, Schmitt trigger and an
open-drain output driver. With suitable output pull up, they
can be used with bipolar or CMOS logic circuits.
more stable with both temperature and supply voltage
changes. The unipolar switching characteristic makes these
devices ideal for use with a simple bar or rod magnet.
Thanks to its wide operating voltage range and extended
choice of temperature range, it is quite suitable for use in
automotive, industrial and consumer applications.
These Hall-effect switches are monolithic integrated circuits
with tighter magnetic specifications, designed to operate
continuously over extended temperatures to +150℃,and are
The device is delivered in a Small Outline Transistor (SOT)
and in a Plastic Single In Line (SIP 3L flat). Both 3-lead
packages are RoHS compliant.
Glossary of Terms
MilliTesla (mT),
Gauss Units of magnetic flux density: 1mT = 10 Gauss
RoHS
Restriction of Hazardous Substances
Operating Point (BOP)
Magnetic flux density applied on the branded side of the package which turns the output
driver ON (VOUT = VDSon)
Release Point (BRP)
Magnetic flux density applied on the branded side of the package which turns the output
driver OFF (VOUT = high)
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S1101
Unipolar Hall Switch-Low Sensitivity
Pin Definitions and Descriptions
SOT Pin №
SIP Pin №
Name
Type
Function
1
1
VDD
Supply
Supply Voltage pin
2
3
OUT
Output
Open Drain Output pin
3
2
GND
Ground
Ground pin
Absolute Maximum Ratings
Parameter
Symbol
Value
Units
Supply Voltage
VDD
28
V
Supply Current
IDD
50
mA
Output Voltage
VOUT
28
V
Output Current
IOUT
50
mA
Storage Temperature Range
TS
-65 to 170
°C
Symbol
Value
Units
Temperature Suffix “E”
TA
-40 to 85
°C
Temperature Suffix “L”
TA
-40 to 150
°C
Absolute maximum ratings
Operating Temperature Range
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for
extended periods may affect device reliability.
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S1101
Unipolar Hall Switch-Low Sensitivity
General Electrical Specifications
DC Operating Parameters TA = 25℃, VDD= 3.5V to 24V (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Supply Voltage
VDD
Operating
3.5
Supply Current
IDD
B < BRP
1.5
Output Saturation Voltage
VDSon
Output Leakage Current
Typ
Max
Units
24
V
2.5
5
mA
IOUT = 20mA, B > BOP
0.4
0.5
V
IOFF
B < BRP VOUT = 24V
0.01
10
µA
Output Rise Time
tr
RL = 1kΩ, CL = 20pF
0.25
µs
Output Fall Time
tf
RL =1kΩ, CL = 20pF
0.25
µs
Magnetic Specifications
DC Operating Parameters VDD = 3.5V to 24V (unless otherwise specified)
S1101
Parameter
Symbol
Operating Point
BOP
Release Point
BRP
Hysteresis
BHYS
Test Conditions
Ta=25℃,Vdd=12V DC
Min
Typ
Max
Units
60
100
G
20
80
G
30
G
Application Information
Typical Three-Wire Application Circuit
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S1101
Unipolar Hall Switch-Low Sensitivity
Automotive and Harsh, Noisy Environments Three-Wire Circuit
Application Comments
For proper operation, a 100nF bypass capacitor should be placed as close as possible to the device between the VDD and ground pin.
For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin.
When using a resistor, three points are important:
- the resistor has to limit the reverse current to 50mA maximum (VCC / R1≈50mA)
- the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1.IDD)
- the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC2/ R1)
When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V).
Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended.
Both solutions provide the required reverse voltage protection.
When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended that figure 13.3
from the Application Information section is used.
The low-pass filter formed by R1 and C1 and the zener diode Z1 bypass the disturbances or voltage spikes
occurring on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection.
ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
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S1101
Unipolar Hall Switch-Low Sensitivity
Package Information
2.13
0.76 ± 0.05
1.58 ± 0.1
Package UA, 3-Pin SIP:
3° ± 1°
1.00
45° ± 1°
4.0 ± 0.02
1
2
3
3.0 ± 0.02
Sensor Location
S01X
xxx
Active Area Depth:
0.84(Nom)
3° ± 1°
6° ± 1°
3° ± 1°
6° ± 1°
1
2
0.05 ± 0.05
3
1.1.± 0.1
3 - 0.44
14 ± 0.5
3 - 0.39
Notes:
1). Controlling dimension : mm ;
2). Leads must be free of flash and plating voids ;
3). Do not bend leads within 1 mm of lead to package interface ;
4). PINOUT: Pin 1 VDD
Pin 2 GND
Pin 3 Output
Marking:
S – SEC logo
01X — Code of Device(S1101E or L)
XXX – Production Lot
1.27
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S1101
Unipolar Hall Switch-Low Sensitivity
Package LH, 3-Pin SOT-23:
S11XX
Marking:
11 — Code of Device
XX – Production Lot
Ordering Information
Part No.
Pb-free
Temperature Code
Package Code
Packing
S1101
YES
E(-40°C to 85°C)
LHLT(SOT-23)
7-in. reel, 3000 pieces/reel
S1101
YES
E(-40°C to 85°C)
UA(TO-92)
Bulk, 1000 pieces/bag
S1101
YES
L(-40°C to 150°C)
LHLT(SOT-23)
7-in. reel, 3000 pieces/reel
S1101
YES
L(-40°C to 150°C)
UA(TO-92)
Bulk, 1000 pieces/bag
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