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Ratiometric Linear Hall Effect Sensor ICs
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
DEVICE CHARACTERISTICS
1
 over operating temperature (T
A
) range, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min.
Typ.
2
Max.   Units
Electrical Characteristics; V
CC
 = 5 V, unless otherwise noted
Supply Voltage
V
cc(op)
Operating; Tj < 165癈
4.5
5.0
5.5
V
Supply Current
I
cc
B = 0, I
out
 = 0

5.6
8
mA
Quiescent Voltage
V
out(q)
B = 0, T
A
= 25篊, I
out
 = 1 mA
2.425
2.5
2.575    V
Output Voltage
3
V
out(H)
B = +X, I
out
 = 1 mA

4.7

V
V
out(L)
B = X, I
out
 = 1 mA

0.2

V
Output Source Current Limit
3
I
out(LM)
B = X, V
out
 ?0
1.0
1.5

mA
Supply Zener Clamp Voltage
V
Z
I
cc
 = 11 mA = I
cc(max)
 + 3
6
8.3

V
Output Bandwidth
BW

30

kHz
Clock Frequency
f
C

150

kHz
Output Characteristics; over V
CC
 range, unless otherwise noted
Noise, Peak-to-Peak
4
V
N
A1321; C
bypass
 = 0.1 糉, no load


40    mV
A1322; C
bypass
 = 0.1 糉, no load


25    mV
A1323; C
bypass
 = 0.1 糉, no load


20    mV
Output Resistance
R
out
I
out
d ? mA

1.5
3
?/DIV>
Output Load Resistance
R
L
I
out
d ? mA, VOUT to GND
4.7


k?/DIV>
Output Load Capacitance
C
L
VOUT to GND


10
nF
1
Negative current is de ned as conventional current coming out of (sourced from) the speci ed device terminal.
2
Typical data is at T
A
 = 25癈. They are for initial design estimations only, and assume optimum manufacturing and application
conditions. Performance may vary for individual units, within the speci ed maximum and minimum limits.
3
In these tests, the vector X is intended to represent positive and negative  elds suf cient to swing the output driver between fully OFF
and saturated (ON), respectively. It is NOT intended to indicate a range of linear operation.
4
 Noise speci cation includes both digital and analog noise.
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