SS1352

SS1352
Unipolar Hall Switch
Features and Benefits
–
–
–
–
–
–
–
Application Examples
–
–
–
–
–
–
–
Wide operating voltage range from 3.5V to 24V
Medium sensitivity
CMOS technology
Chopper-stabilized amplifier stage
 Superior temperature stability
 Extremely low switchpoint drift
 Insensitive to physical stress
Low current consumption
Open drain output
Tiny SOT23 3L or flat SIP 3L
both RoHS Compliant packages
Automotive, Consumer and Industrial
Solid-state switch
Interrupter
Speed detection
Linear position detection
Angular position detection
Proximity detection
3 pin SOT23 (suffix SO)
3 pin SIP (suffix UA)
Functional Block Diagram
VDD
Voltage
Regulator
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
1
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
General Description
HED – Hall Electronic Device - in addition to those
listed above. 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.
The SS1352 is a unipolar Hall effect sensor IC
fabricated from mixed signal CMOS technology.
The device integrates a voltage regulator, Hall
sensor with dynamic offset cancellation system,
Schmitt trigger and an open-drain output driver, all
in a single package.
The device is delivered in a Small Outline
Transistor (SOT) for surface mount process or in a
Plastic Single In Line (SIP flat) for through- hole
mount. Both 3-lead packages are RoHS compliant.
It incorporates advanced chopper stabilization
techniques to provide accurate and stable magnetic
switch points. There are many applications for this
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)
2
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
Pins Definition and Description
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
Unique Features
Based on mixed signal CMOS technology, SS1352 is a Hall-effect device with high magnetic sensitivity. This
multi-purpose latch meets most of the application requirements.
The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with
Hall sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to
smaller chip size and lower current consumption than bipolar technology. The small chip size is also an important
factor to minimize the effect of physical stress. This combination results in more stable magnetic characteristics
and enables faster and more precise design.
The wide operating voltage from 2.5V to 24V, low current consumption and large choice of operating
temperature range according to “L”, “K”and “E” specifications make this device suitable for automotive,
industrial and consumer applications.
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
Maximum Junction Temperature
TJ
-50 to 150
165
3
°C
°C
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
Symbol
Value
Units
Temperature Suffix “E”
TA
-40 to 85
°C
Temperature Suffix “K”
TA
-40 to 125
°C
Temperature Suffix “L”
TA
-40 to 150
°C
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.
General Electrical Specifications
DC Operating Parameters TA = 25°C, VDD=3.5V to 24V (unless otherwise specified)
Parameter
Symbol
Test Conditions
Typ
Min
Max
Units
24
V
5
mA
0.5
V
10
µA
Supply Voltage
VDD
Operating
Supply Current
IDD
B < BRP
Output Saturation Voltage
VDSon
IOUT = 20mA, B > BOP
Output Leakage Current
IOFF
B < BRP VOUT = 24V
1
Output Rise Time
tr
RL = 1kΩ, CL = 20pF
0.25
µs
Output Fall Time
tf
RL = 1kΩ, CL = 20pF
0.25
µs
---
10
KHz
Single layer (1S) Jedec board
301
°C/W
Maximum Switching Frequency FSW
Package Thermal Resistance
RTH
3.5
Note: The output of SS1352 will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal
until the supply is over 3.5V.
Magnetic Specifications
DC Operating Parameters VDD = 3.5 to 24V (unless otherwise specified)
Package
UA
SO
Parameter
Symbol
Operating Point
BOP
Release Point
BRP
Hysteresis
BHYST
Operating Point
BOP
Release Point
BRP
Hysteresis
BHYST
Test Conditions
Ta=25°C,Vdd=12V DC
Min
Typ
Max
Units
-160
-100
G
-140
-50
G
40
Ta=25°C,Vdd=12V DC
100
160
G
50
140
G
40
4
G
G
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
Output Behavior versus Magnetic Pole
DC Operating Parameters TA = -40°C to 150°C, VDD = 3.5 to 24V (unless otherwise specified)
Test Conditions (UA)
Test Conditions (SO)
OUT
B > BRP
B < BRP
High
B < BOP
B > BOP
Low
The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be turned on(drops low) in the presence of a
sufficiently strong South pole magnetic field applied to the marked face.
Application Information
It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor)
between the supply(VDD Pin) and ground(GND Pin) of the device to reduce both external noise and noise
generated by the chopper stabilization technique. As is shown in the following figure, a 0.1μF capacitor is
typical.
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.
Typical Three-Wire Application Circuit
SS1352
When a weak power supply is used or when the device is intended to be used in noisy environment, it is
5
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
recommended that following figure is used.
Automotive and Severe Environment Protection Circuit
SS1352
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. Both
solutions provide the required 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.
6
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
Package Information
Package SO, 3-Pin (SOT-23):
Notes:
1). PINOUT:
Pin 1 VDD
Pin 2 Output
Pin 3 GND
2). All dimensions are in millimeters;
Top View
3
1.50
1
2.65
2
1.80
Side View
2.82
End View
0.10
1.05
0.70
0.30
0.00
0.30
Bottom View of SOT-23 Package
3
Chip
0.56
0.66
0.85
2
1
1.50
7
V3.10 Nov 1, 2013
SS1352
Unipolar Hall Switch
2.13
1.87
0.75 ± 0.05
1.52 ± 0.1
Package UA, 3-Pin SIP(TO-92):
3° ± 1°
1.00
1.20
45° ± 1°
4.0 ± 0.01
1
2
3
3.0 ± 0.01
Sensor Location
Active Area Depth:
0.84(Nom)
3° ± 1°
6° ± 1°
3° ± 1°
6° ± 1°
1
2
3
0.05 ± 0.05
1.6.± 0.1
0.44± 0.01
0.38 ± 0.01
14 .5 ± 1
0.39± 0.01
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
1.27
2.54
Ordering Information
Part No.
Pb-free
Temperature Code
Package Code
Packing
SS1352EUA
YES
-40°C to 85°C
SOT-23
Bulk, 1000 pieces/bag
SS1352ESOT
YES
-40°C to 85°C
SOT-23
7-in. reel, 3000 pieces/reel
SS1352KUA
YES
-40°C to 125°C
SOT-23
Bulk, 1000 pieces/bag
SS1352KSOT
YES
-40°C to 125°C
SOT-23
7-in. reel, 3000 pieces/reel
SS1352LUA
YES
-40°C to 150°C
SOT-23
Bulk, 1000 pieces/bag
SS1352LSOT
YES
-40°C to 150°C
SOT-23
7-in. reel, 3000 pieces/reel
8
V3.10 Nov 1, 2013