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OHS3151U

Ratiometric Linear Hall-Effect Sensor

TT Electronics. 

Sensing and Control

Ratiometric Linear Hall-Effect Sensor

OHS3150U, OHS3151U

Characteris cs Defini ons

Quiescent voltage Output: With no magne c 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 opera ng 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 calcula on.

VOQ (TA) ‐ VOQ (25°C)

ΔVOQ (T) = ————————‐

Sens (25°C)

Sensi vity: A magne c south pole at, and perpendicular to, the device’s symbolized package face will increase

the voltage output above the quiescent value. Conversely a magne c north pole will decrease the

voltage output below the quiescent value. This change in voltage output with applied magne c

field is sensi vity and is specified in mV/G by the calcula on.

VO (+500G) ‐ VO (‐500G)

Sens = —————————————

1000

The change is sensi vity over temperature is specified in percent by the calcula on

Sens (TA) ‐ Sens (25°C)

ΔSens (ΔT) =

———————————‐

X 100%

Sens (25°C)

Ra ometry: The quiescent voltage output and sensi vity of these ra ometric linear Hall‐effect devices are

propor onal to the supply voltage. The change in quiescent voltage output with supply voltage is

specified in percent by the calcula on

VO (VCC) ‐ VO (5V)

ΔVOQ (ΔV) =

——————————

X 100%

VCC / 5 V

This change in sensi vity with supply voltage is also specified in percent by the calcula on

VOQ (VCC) / VOQ (5V)

ΔSens (ΔV) =

——————————

X 100%

VCC / 5 V

Linearity & Symmetry: The ability of the voltage output to vary in constant propor on to the applied magne c field is

linearity and is specified in percent by the calcula on

+ 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 calcula on

‐ Linearity =

VO (500G) ‐ VOQ

——————————

VOQ ‐VOQ (‐500G)

X 100%

General Note

TT Electronics reserves the right to make changes in product specifica on

without no ce or liability. All informa on is subject to TT Electronics’ own data

and is considered accurate at me of going to print.

© TT electronics plc

1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200

www.optekinc.com | www. electronics.com

Issue D 01/2016 Page 3

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