Allegro MicroSystems A1321, Описание

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Ratiometric Linear Hall Effect Sensor ICs
for High-Temperature Operation
A1321, A1322,
and
A1323
5
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
MAGNETIC CHARACTERISTICS
1,2 over operating temperature range, T
A
; V
CC
= 5 V, I
out
= –1 mA; unless otherwise noted
Characteristics Symbol Test Condition Min Typ
3
Max Units
4
Sensitivity 5 Sens
A1321; T
A
= 25ºC 4.750 5.000 5.250 mV/G
A1322; T
A
= 25ºC 2.969 3.125 3.281 mV/G
A1323; T
A
= 25ºC 2.375 2.500 2.625 mV/G
Delta V
out(q)
as a func-
tion of temperature
V
out(q)( Δ T)
De fi ned in terms of magnetic fl ux density, B – – ±10 G
Ratiometry, V
out(q)
V
out(q)( Δ V)
– – ±1.5 %
Ratiometry, Sens Δ Sens
( Δ V)
– – ±1.5 %
Positive Linearity Lin+ – – ±1.5 %
Negative Linearity Lin– – – ±1.5 %
Symmetry Sym – – ±1.5 %
UA Package
Delta Sens at T
A
= max
5
Δ Sens
(TAmax)
From hot to room temperature –2.5 – 7.5 %
Delta Sens at T
A
= min 5 Δ Sens
(TAmin)
From cold to room temperature –6 – 4 %
Sensitivity Drift 6 Sens
Drift
T
A
= 25°C; after temperature cycling and over time – ±2 – %
LH Package
Delta Sens at T
A
= max
5
Δ Sens
(TAmax)
From hot to room temperature –5 – 5 %
Delta Sens at T
A
= min 5 Δ Sens
(TAmin)
From cold to room temperature –3.5 – 8.5 %
Sensitivity Drift 6 Sens
Drift
T
A
= 25°C; after temperature cycling and over time – ±2 – %
1 Additional information on characteristics is provided in the section Characteristics De fi nitions, on the next page.
2 Negative current is de fi ned as conventional current coming out of (sourced from) the speci fi ed device terminal.
3 Typical data is at T
A
= 25°C, except for Δ Sens, 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 speci fi ed 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.