Micro Power 3 V Linear Hall Effect Sensor ICs

with Tri-State Output and User Selectable Sleep Mode

A1391, A1392,

A1393, and A1395

9

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

Characteristics Definitions

Ratiometric.

The A139x devices feature ratiometric output.

The quiescent voltage output and sensitivity are proportional to

the ratiometric supply reference voltage.

The percent ratiometric change in the quiescent voltage output is

defined as:

÷

=

× 100 %

(1)

and the percent ratiometric change in sensitivity is defined as:

÷

=

× 100%

(2)

Linearity and Symmetry.

The on-chip output stage is

designed to provide a linear output with maximum supply voltage

not damage these devices, it will force the output into a non-lin-

ear region. Linearity in percent is measured and defined as

–

=

× 100 %

Lin+

(3)

–

=

× 100 %

Lin–

(4)

and output symmetry as

–

=

× 100 %

Sym

(5)