OHN3151U 查看數據表（PDF） - Optek Technology

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OHN3151U

Ratiometric Linear Hall-effect Sensor

Optek Technology 

Ratiometric Linear Hall-effect Sensor

OHN3150U, OHN3151U, OHS3150U, OHS3151U

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 (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.

VOQ (TA) - VOQ (25°C)

∆VOQ (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)

∆Sens (∆T) = ———————————- 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

VO (VCC) - VO (5V)

∆VOQ (∆V) =

——————————

VCC / 5 V

X 100%

This change in sensitivity with supply voltage is also specified in percent by the

calculation

∆Sens (∆V) =

VOQ (VCC) / VOQ (5V)

——————————

VCC / 5 V

X 100%

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

+ Linearity =

VO (+500G) - VOQ

——————————

X 100%

2(VO (250G) -VOQ)

- Linearity =

VO (-500G) - VOQ

——————————

2(VO (-250G) -VOQ)

X 100%

The output is also specified in percent by the calculation

VO (500G) - VOQ

- Linearity = —————————— X 100%

VOQ -VOQ (-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 06/05

Page 3 of 4

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