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Ratiometric Linear Hall Effect Sensor
for High-Temperature Operation
A1321, A1322,
and A1323
4
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)(ΔT)
Defi ned in terms of magnetic fl ux density, B – – ±10 G
Ratiometry, V
out(q)
V
out(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 T
A
= max
5
ΔSens
(TAmax)
From hot to room temperature –2.5 – 7.5 %
Delta Sens at T
A
= min
5
ΔSens
(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
ΔSens
(TAmax)
From hot
to room temperature –5 – 5 %
Delta Sens at T
A
= min
5
ΔSens
(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 chracteristics is provided in the section Characteristics Defi nitions, on the next page.
2
Negative current is defi ned as conventional current coming out of (sourced from) the specifi ed device terminal.
3
Typical data is at T
A
= 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 specifi 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.