Ratiometric Linear Hall-effect Sensor
OMH3150, OMH3150B, OMH3150S
Features:
•
•
•
•
•
•
Ratiometric linear output capable of sinking and sourcing current
Designed for non-contact switching operations
Operates over a broad range of supply voltages
Excellent temperature stability operates in harsh environments
Suitable for military and space applications
Processing patterned after class B or S of MIL-STD-883
Ceramic Package
Product Photo Here
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 3150 ratiometric linear Hall-effect sensors can be used as a non-contact sensor for rotary and linear
position sensing and for current sensing.
Ordering Information
OMH3150
OMH3150B
OMH3150S
-40°C to +125°C
V
OQ
Change over T
A
= ±50 Gauss
Sensitivity=3.50 mV/G & T
A
= 25ºC
Applications:
•
•
•
Non-contact magnetic
sensing
Assembly lIne automation
Machine automation
•
•
•
Machine safety
Door sensor
Where sensing is required
in dirty environments
1 Vcc
Voltage
Regulator
Qual
Hall
Element
Dual to
Single
Converter
Vcc
3
Output
2 Gnd
Lead Information:
Base Material = Kovar
Plating = 80 µ inches Ag over 50-300 µ inches Ni
“S” version only = Solder dip 63 %(SN) - 37 %(pb)
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
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 A.2
05/09
Page 1 of 4
Ratiometric Linear Hall-effect Sensor
OMH3150, OMH3150B, OMH3150S
Absolute Maximum Ratings
Supply Voltage, V
CC
Storage Temperature Range, T
S
Operating Temperature Range, T
A
Lead Soldering Temperature (1/8 inch [3.2 mm] from case for 5 seconds with soldering iron)
Power Dissipation, P
D
Output Current, I
O
Magnetic Flux Density, B
6V
-65°C to +150° C
-40°C to +125° C
260° C
(1)
100 mW
5 mA
Unlimited
Electrical Characteristics
(Over Operating Temperature Range at V
CC
= 5 V, unless otherwise noted)
SYMBOL
V
CC
I
CC
V
OQ
I
O
I
O
PARAMETER
Supply Voltage
Supply Current
Quiescent Voltage Output
2.25
2.10
Sink Current
Source Current
0.5
-1.0
MIN
4.5
TYP
5.0
5.5
2.5
2.5
MAX UNITS
6.00
10.00
2.75
2.90
V
mA
V
V
mA
mA
Vcc = 6 V, I
O
= 0 mA, B = OG
B = OG, T
A
= 25° C
B = OG, T
A
= -40°C to +125°C
TEST CONDITIONS
OMH3150
SYMBOL
T
A
Sens
∆Sens(∆T)
∆V
OQ
(∆T)
∆Sens(∆V)
∆V
OQ
(∆V)
+Lin
-Lin
Sym
PARAMETER
Operating
Temperature Range
Sensitivity
@ T
A
= 25° C
Sens Change
@ T
A
> 25° C
@ T
A
< 25° C
V
OQ
Change
over T
A
Ratiometric Sense Change
Ratiometric V
OQ
Change
Positive Lin
≥
25
< 25
Negative Lin
≥
25
< 25
Output Symmetry
MIN
-40
3.00
-5
-12
-
-
-
80
90
80
90
80
TYP
-
3.50
-
-
-
100
100
-
-
-
-
100
MAX
125
4.10
10
3.0
±50
-
-
105
110
105
110
110
UNITS
°C
mV/G
%
%
G
%
%
%
%
%
Note:
(1) Negative current is defined a coming out of (sourcing) the output.
(2) See characteristics definitions for test conditions and calculation formulas.
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.2 05/09
Page 2 of 4
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
Ratiometric Linear Hall-effect Sensor
OMH3150, OMH3150B, OMH3150S
Characteristics Definitions
Quiescent voltage Output:
With no magnetic field present the device in the quiescent state and the voltage
output is approximately equal to one-half the supply voltage (V
OQ
= V
CC
/ 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)
- V
OQ (25°C)
ΔV
OQ (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)
- V
O (-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)
- V
O (5V)
ΔV
OQ (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)
/ V
OQ (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) -
V
OQ
+ Linearity =
——————————
X 100%
2(V
O (250G)
-V
OQ
)
- Linearity =
V
O (-500G) -
V
OQ
——————————
2(V
O (-250G)
-V
OQ
)
X 100%
The output is also specified in percent by the calculation
V
O (500G) -
V
OQ
——————————
X 100%
- Linearity =
V
OQ
-V
OQ (-500G)
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
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 A.2
05/09
Page 3 of 4
Ratiometric Linear Hall-effect Sensor
OMH3150, OMH3150B, OMH3150S
Output vs Gauss
1000
800
600
400
Typical Gauss
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
Typical Output (Volts)
Icc vs Temperature
8.0
7.0
6.0
Typical Icc (mA)
5.0
4.0
3.0
2.0
1.0
0.0
-60
-40
-20
0
20
40
60
80
100 120 140 160
Temperature (°C)
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Issue A.2 05/09
Page 4 of 4
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
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