OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Ratiometric Linear Hall-effect Sensor
OHN3150U, OHN3151U, OHS3150U, OHS3151U
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B.1 01/09
Page 1 of 4
Features:
• Ratiometric linear output capable of sinking and sourcing current
• 4.5 V to 6.0 V operation
• Responds equally to positive and negative magnetic fields
• Excellent temperature stability to operate in harsh environments
• Robust package capable of withstanding harsh environments
Description:
Each ratiometric linear Hall-effect sensor contains a monolithic integrated circuit on a single chip. This circuit
incorporates a quadratic Hall sensing element, which minimizes the effects of mechanical and thermal stress on
the Hall element and temperature compensating circuitry to compensate for the inherent Hall element sensitivity
change over temperature current.
These ratiometric linear Hall-effect sensors provide an output voltage that varies in proportion to the applied
magnetic field. The voltage output will increase in response to a south pole (positive) magnetic field applied
perpendicular to the package symbolization face, and will decrease in response to a north pole (negative)
magnetic field.
These 3150U & 3151U ratiometric linear Hall-effect sensors can be used as a non-contact sensor for rotary and
linear position sensing and for current sensing. The devices in this series are similar in performance, except for
their allowable quiescent voltage output change over the specified operating temperature range.
Product Photo Here
Ordering Information
Through Hole Temp. Range VOQ Threshold
OHN3150U -20°C to +85°C
VOQ Change over TA = ±35 Gauss
OHS3150U -40°C to +150°C
OHN3151U -20°C to +85°C
VOQ Change over TA = ±50 Gauss
OHS3151U -40°C to +150°C
Applications:
• Non-contact magnetic sensing
• Assembly line automation
• Machine automation
• Machine safety
• Door sensor
• Where sensing is required in dirty environments
2
3
1Vcc
Output
Gnd
Vcc
Dual to
Single
Converter
Qual
Hall
Element
Voltage
Regulator
RoHS
DIMENSIONS ARE IN: INCHES
[MILLIMETERS]
Through Hole
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Ratiometric Linear Hall-effect Sensor
Emitting Diode
OHN3150U, OHN3151U, OHS3150U, OHS3151U
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B .1 01/09
Page 2 of 4
Note:
(1) Negative current is defined as a coming out of (sourcing) the output.
(2) See characteristics definitions for test conditions and calculation formulas.
Supply Voltage, VCC 6 V
Storage Temperature Range, TS -65°C to +170° C
Operating Temperature Range, TA (OHS prefix)
(OHN prefix)
-40°C to +150° C
-20°C to +85° C
Lead Soldering Temperature (1/8 inch [3.2 mm] from case for 5 seconds with soldering iron) 260° C(1)
Power Dissipation, PD 100 mW
Output Current, IO 5 mA
Magnetic Flux Density, B Unlimited
Absolute Maximum Ratings
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
VCC Supply Voltage 4.5 5.0 6.00 V
ICC Supply Current 5.5 10.00 mA
Vcc = 6 V, IO = 0 mA, B = OG
VOQ
Quiescent Voltage Output 2.25 2.5 2.75 V B = OG, TA = 25° C
2.10 2.5 2.90 V B = OG, TA = -40°C to +150°C
IO Sink Current 0.5 mA
IO Source Current -1.0 mA
Electrical Characteristics (Over Operating Temperature Range at VCC = 5 V, unless otherwise noted)
SYMBOL
PARAMETER OHS3150U OHS3151U OHN3150U OHN3151U
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
TA
Operating
Temperature
Range
-40 - 150 -40 - 150 -20 - 85 -20 - 85 ° C
Sens
Sensitivity
@ TA = 25° C
over TA
2.25
2.0
2.5
-
2.75
3.0
2.25
2.0
2.5
-
2.75
3.0
2.25
2.0
2.5
-
2.75
3.0
2.25
2.0
2.5
-
2.75
3.0
mV/G
mV/G
∆Sens(∆T)
Sens Change
@ TA > 25° C
@ TA < 25° C
-2
-10
-
-
8
0
-2
-10
-
-
8
0
-2
-10
-
-
8
0
-2
-10
-
-
8
0
%
%
∆VOQ(∆T) VOQ Change
over TA - - ±35 - - ±50 - - ±35 - - ±50 G
-Lin Negative Lin ≥ 25
< 25
95
90
-
-
101
101
95
90
-
-
101
101
95
90
-
-
101
101
95
90
-
-
101
101 %
Sym Output Symmetry 95 100 105 95 100 105 95 100 105 95 100 105 %
UNITS
+Lin Positive Lin ≥ 25
< 25
99
99
-
-
105
110
99
99
-
-
105
110
99
99
-
-
105
110
99
99
-
-
105
110 %
∆VOQ(∆V) Ratiometric VOQ
Change - 100 - - 100 - - 100 - - 100 - %
∆Sens(∆V) Ratiometric Sense
Change - 100 - - 100 - - 100 - - 100 - %
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Ratiometric Linear Hall-effect Sensor
OHN3150U, OHN3151U, OHS3150U, OHS3151U
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B.1 01/09
Page 3 of 4
Characteristics Definitions
Quiescent voltage Outp ut: With no magnetic field present the device in the quiescent state and the voltage
output is approximately equal to one-half the supply voltage (VOQ = VCC / 2) over
the operating voltage and temperature range. The change in quiescent voltage
output over temperature gives the device’s equivalent accuracy and is specified in
gauss by the calculation.
V
OQ (TA) - VOQ (25°C)
ΔVOQ (T) = ————————-
Sens
(25°C)
Sensitivity: A magnetic south pole at, and perpendicular to, the device’s symbolized package
face will increase the voltage output above the quiescent value. Conversely a
magnetic north pole will decrease the voltage output below the quiescent value.
This change in voltage output with applied magnetic field is sensitivity and is
specified in mV/G by the calculation.
VO
(+500G) - VO (-500G)
Sens = —————————————
1000
The change is sensitivity over temperature is specified in percent by the
calculation
Sens
(TA) - Sens (25°C)
ΔSens (ΔT) = ———————————- X 100%
Sens
(25°C)
Ratiometry: The quiescent voltage output and sensitivity of these ratiometric linear Hall-effect
devices are proportional to the supply voltage. The change in quiescent voltage
output with supply voltage is specified in percent by the calculation
V
O (VCC) - VO (5V)
ΔVOQ (ΔV) = —————————— X 100%
V
CC / 5 V
This change in sensitivity with supply voltage is also specified in percent by the
calculation
V
OQ (VCC) / VOQ (5V)
ΔSens (ΔV) = —————————— X 100%
V
CC / 5 V
Linearity & Symmetry: The ability of the voltage output to vary in constant proportion to the applied
magnetic field is linearity and is specified in percent by the calculation
V
O (+500G) - VOQ
+ Linearity = —————————— X 100%
2(VO (250G) -VOQ)
V
O (-500G) - VOQ
- Linearity = —————————— X 100%
2(VO (-250G) -VOQ)
The output is also specified in percent by the calculation
V
O (500G) - VOQ
- Linearity = —————————— X 100%
V
OQ -VOQ (-500G)
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Ratiometric Linear Hall-effect Sensor
Emitting Diode
OHN3150U, OHN3151U, OHS3150U, OHS3151U
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B .1 01/09
Page 4 of 4
Icc vs Temperature
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
-60 -40 -20 0 20 40 60 80 100 120 140 160
Temperature (°C)
Typical Icc (mA)
Output vs Gauss
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Typical O ut p ut ( Vol t s )
Typical Gauss
