A1391 View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

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A1391

Micro Power 3 V Linear Hall Effect Sensors with Tri-State Output and User-Selectable Sleep Mode

Allegro MicroSystems 

A1391, A1392,

Micro Power 3 V Linear Hall Effect Sensors with

A1393, and A1395 Tri-State Output and User Selectable Sleep Mode

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:

ΔVOUTQ(ΔV) =

ΔVOUTQ(VREF)÷ ΔVOUTQ(3V)

× 100 %

VREF ÷ 3 V

(1)

and the percent ratiometric change in sensitivity is defined as:

ΔSens(ΔV) =

ΔSens(VREF)÷ ΔSens(3V) × 100%

VREF ÷ 3 V

(2)

Linearity and Symmetry. The on-chip output stage is

designed to provide a linear output with maximum supply voltage

of VCCN. Although application of very high magnetic fields will

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

ear region. Linearity in percent is measured and defined as

VOUT(+B) – VOUTQ

Lin+ =

× 100 %

2(VOUT(+B / 2) – VOUTQ )

(3)

VOUT(–B) – VOUTQ

Lin– =

× 100 %

2(VOUT(–B / 2) – VOUTQ )

(4)

and output symmetry as

Sym =

VOUT(+B) – VOUTQ

VOUTQ – VOUT(–B)

× 100 %

(5)

Allegro MicroSystems, Inc.

9

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

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