Magnetoresistive Sensor ICs
The SS39ET/SS49E/SS59ET Series low-cost linear Hall-effect sensor ICs are small, versatile devices that are operated
by the magnetic field from a permanent magnet or an electromagnet. They are designed and manufactured for cost
competitiveness.
The linear sourcing output voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field.
Low voltage capability as low as 2.7 Vdc and reduced current consumption of only 6 mA typically at 5 Vdc help make this
product energy efficient.
The integrated circuitry features low noise output, which makes it unnecessary to use external filtering. These sensor ICs
Interface with many electrical components without buffering. They also include thin film resistors to provide increased
temperature stability and accuracy.
These linear Hall-effect sensor ICs have an operating temperature range of -40 °C to 100°C [-40 °F to 212 °F], appropriate
for industrial and medical environments. Thermal balancing allows for stable operation over the full temperature range.
They are available in three package styles, all of which may be supplied on tape for automated, lower-cost assembly:
•
SOT-23:
SS39ET. This small footprint takes up less space on the PC board, typically allowing for more components.
•
Flat TO-92-style, with different lead configurations:
SS49E, SS49E-L, SS49E-F.
•
SOT-89B:
SS59ET.
Key Features
•
•
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•
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Miniature and subminiature construction:
Designed for
compact designs with tight space requirements
Energy efficient:
Low current consumption of 6 mA at 5 Vdc
Easy PC board interface:
Single current sourcing output for
common electronic circuits
Circuit design flexibility:
Voltage range of 2.7 Vdc to 6.5 Vdc
Low noise output:
Virtually eliminates the need for filtering
Stable output:
Thin film resistors improve accuracy
Wide range of environments:
Temperature range of -40 °C
to 100 °C [-40 °F to 212 °F]
Application flexibility:
Responds to either positive or
negative Gauss
Potential
Applications
InduSTrIAL
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Basic current sensing for motor load monitoring, detection
Anti-tampering magnetic field sensor in smart remote utility
meters
Pump control in heavy-duty equipment and household
appliances
Simple linear or angular displacement sensing
Handlebar/throttle position sensing in e-bikes and scooters
Current sensing in appliances
Speed adjustment trigger in tools and appliances
Magnetic code reading in safes, security and building access
control systems
MEdICAL
•
Position sensing in infusion pumps
Cost Competitive • energy effiCient
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SS39ET/SS49E/SS59ET Series
Table 1. Operating Characteristics (Vs = 5.0 V, T
A
= -40 °C to 85 °C [-40 °F to 185 °F], except where noted.)
Characteristic
Output type
Magnetics type
Supply voltage
Supply current
Output voltage
Output current
Null
Output voltage span
Magnetic range
Sensitivity
Operating temperature
Temperature error:
Null drift
Sensitivity drift
Linearity
Response time
Table 2. Absolute Maximum ratings
Characteristic
Supply voltage (Vs)
Output current
Storage temperature
Parameter
-5.0 Vdc to 8.0 Vdc
10 mA
-55 °C to 165 °C [-67 °F to 329 F°]
—
25 °C [77 °F]
—
Vs > 3.0 V
0 Gauss, 25 °C
—
—
25 °C
—
—
≥25 °C
<25 °C
—
—
Condition
Min.
linear, sourcing
analog
2.7
—
1.0
1.0
2.25
1.05 to (Vs - 1.05)
±650
1.0
-40 [-40]
-0.10
-0.15
-0.04
—
—
—
6
1.4
1.5
2.50
0.95 to (Vs - 0.95)
±1000
1.4
—
—
—
—
-0.7
3
6.5
10
1.75
1.5
2.75
—
—
1.75
100 [212]
0.10
0.05
0.185
—
—
Typ.
Max.
unit
—
—
Vdc
mA
mV/Gauss
mA
Vdc
Vdc
Gauss
mV/Gauss
°C [°F]
%/°C
% of span
μs
nOTICE
Absolute maximum ratings are the extreme limits that the device will withstand without damage to the
device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits
(above recommended operating conditions) are approached, nor will the device necessarily operate at
absolute maximum ratings.
CAUTION
ELECTROSTATIC
SENSITIVE
DEVICES
DO NOT OPEN OR HANDLE
EXCEPT AT A
STATIC FREE WORKSTATION
ESD SENSITIVITY:
CLASS 3
Figure 1. Current Sourcing Output Block diagram
Figure 2. Transfer Characteristics (Vs = 5.0 Vdc)
4.0
Voltage (V)
Vs (+)
Typical
Output
Voltage
HALL
SENSOR
2.5
AMPLIFIER
OUTPUT (O)
1.0
65 µA
TYPICAL
V- (-)
-1000
-500
0
500
Magnetic Range (Gauss)
1000
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3
Linear Hall-effect Sensor ICs
Figure 3. Peformance Graphics
null Shift vs Temperature
1
0
Sensitivity Shift vs Temperature
30
Shift from 25 °C (%)
20
10
0
-10
-20
-30
-40
25
Temperature (°C)
85 100
-12.0
-9.0
2.6
3.0
Max.
Shift from 25 °C (%)
0
Max.
Min.
Min.
25
Temperature (°C)
85 100
-
10
-
40
Typical Frequency response
Supply Current vs Temperature
RL = 10 kOhm parallel with 100 pF
Ratio (Vout/Vout at 1 kHz)
1.0
0.9
0.8
0.7
0
10
30 40
20
Frequency (kHz)
50
60
Supply Current (mA)
15
10
Max. Vs = 6.5 V
Max. Vs = 5.0 V
Max. Vs = 3.0 V
5
0
-40
25
Temperature (°C)
100
Sensitvity per Volt vs Vsupply
Sensitivity per Volt (mV/Gauss/V)
0.40
0.35
0.30
0.25
0.20
0.15
2.7 3.0
3.5
4.0
5.0
Supply Voltage (Vdc)
4.5
5.5
6.0
Max.
Nom.
Min.
6.5
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