A1321 datasheet(4/11 Pages) ALLEGRO

4 / 11 page

Ratiometric Linear Hall Effect Sensor

for High-Temperature Operation

A1321, A1322,

and

A1323

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

MAGNETIC CHARACTERISTICS1,2

over operating temperature range, TA; VCC = 5 V, Iout = –1 mA; unless otherwise noted

Characteristics

Symbol

Test Condition

Min

Typ3

Max

Units4

Sensitivity5

Sens

A1321; TA = 25ºC

4.750

5.000

5.250

mV/G

A1322; TA = 25ºC

2.969

3.125

3.281

mV/G

A1323; TA = 25ºC

2.375

2.500

2.625

mV/G

Delta Vout(q) as a func-

tion of temperature

Vout(q)(ΔT)

Deﬁned in terms of magnetic ﬂux density, B

–

±10

Ratiometry, Vout(q)

Vout(q)(ΔV)

–

±1.5

Ratiometry, Sens

ΔSens(ΔV)

–

±1.5

Positive Linearity

Lin+

–

±1.5

Negative Linearity

Lin–

–

±1.5

Symmetry

Sym

–

±1.5

UA Package

Delta Sens at TA = max5 ΔSens(TAmax) From hot to room temperature

–2.5

–

7.5

Delta Sens at TA = min5 ΔSens(TAmin) From cold to room temperature

–6

–

Sensitivity Drift6

SensDrift

TA = 25°C; after temperature cycling and over time

–

LH Package

Delta Sens at TA = max5 ΔSens(TAmax) From hot to room temperature

–5

–

Delta Sens at TA = min5 ΔSens(TAmin) From cold to room temperature

–3.5

–

8.5

Sensitivity Drift6

SensDrift

TA = 25°C; after temperature cycling and over time

–

0.328

1 Additional information on chracteristics is provided in the section Characteristics Deﬁnitions, on the next page.

2 Negative current is deﬁned as conventional current coming out of (sourced from) the speciﬁed device terminal.

3 Typical data is at TA = 25°C, except for ΔSens, and at x.x Sens. Typical data are for initial design estimations only, and assume optimum

manufacturing and application conditions. Performance may vary for individual units, within the speciﬁed maximum and minimum limits.

In addition, the typical values vary with gain.

4 10 G = 1 millitesla.

5 After 150ºC pre-bake and factory programming.

6 Sensitivity drift is the amount of recovery with time.

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