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 A

06/05

Page 3 of 4

Characteristics Definitions

Quiescent voltage Output:

With no magnetic field present the device in the quiescent state and the voltage

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.

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.

Sens = —————————————

1000

The change is sensitivity over temperature is specified in percent by the

calculation

———————————-

X 100%

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

——————————

X 100%

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

calculation

——————————

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 =

——————————

X 100%

- Linearity =

——————————

X 100%

The output is also specified in percent by the calculation

- Linearity =

——————————

X 100%