A1323LLHLT-T Allegro Microsystems Inc, A1323LLHLT-T Datasheet - Page 7
![IC SENSOR HALL EFFECT SOT23W](/photos/19/49/194943/620-sot-23w_sml.jpg)
A1323LLHLT-T
Manufacturer Part Number
A1323LLHLT-T
Description
IC SENSOR HALL EFFECT SOT23W
Manufacturer
Allegro Microsystems Inc
Type
Linear - Ratiometricr
Datasheet
1.A1321ELHLT-T.pdf
(13 pages)
Specifications of A1323LLHLT-T
Sensing Range
2.375mV/G ~ 2.625mV/G
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
8mA
Current - Output (max)
10mA
Output Type
Digital, Open Drain
Features
High Sensitivity
Operating Temperature
-40°C ~ 150°C
Package / Case
SOT-23W
Termination Type
SMD
No. Of Pins
3
Mounting Type
Surface Mount
Hall Effect Type
Linear
Supply Voltage Min
4.5V
Peak Reflow Compatible (260 C)
Yes
Accuracy %
1.5%
Output Current
1mA
Bandwidth
30kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
620-1027-2
A1321, A1322,
and
Quiescent Voltage Output. In the quiescent state (no
magnetic fi eld), the output equals one half of the supply voltage
over the operating voltage range and the operating temperature
range. Due to internal component tolerances and thermal con-
siderations, there is a tolerance on the quiescent voltage output
both as a function of supply voltage and as a function of ambient
temperature. For purposes of specifi cation, the quiescent voltage
output as a function of temperature is defi ned in terms of mag-
netic fl ux density, B, as:
This calculation yields the device’s equivalent accuracy,
over the operating temperature range, in gauss (G).
Sensitivity. The presence of a south-pole magnetic fi eld per-
pendicular to the package face (the branded surface) increases
the output voltage from its quiescent value toward the supply
voltage rail by an amount proportional to the magnetic fi eld
applied. Conversely, the application of a north pole will decrease
the output voltage from its quiescent value. This proportionality
is specifi ed as the sensitivity of the device and is defi ned as:
The stability of sensitivity as a function of temperature is
defi ned as:
A1323
Sens
V
out(q)(
(
Sens
=
Sens
=
=
(
Sens
V
V
out(–B)
out(q)(
( ºC
–
Sens
Sens
–
B
–
( ºC
V
( ºC
out(+B
V
out(q)( ºC
Characteristic Defi nitions
Ratiometric Linear Hall Effect Sensor ICs
%
(1)
(2)
(3)
for High-Temperature Operation
Ratiometric. The A132X family features a ratiometric output.
The quiescent voltage output and sensitivity are proportional to
the supply voltage (ratiometric).
The percent ratiometric change in the quiescent voltage output is
defi ned as:
and the percent ratiometric change in sensitivity is
defi ned as:
Linearity and Symmetry. The on-chip output stage
is designed to provide a linear output with a supply voltage of
5 V. Although application of very high magnetic fi elds will not
damage these devices, it will force the output into a non-linear
region. Linearity in percent is measured and defi ned as:
and output symmetry as:
V
out(q)( V)
Sens
( V
Lin+
Lin–
Sym
=
=
=
=
=
V
Sens
V
out(q)(V
V
out(q)
out(+B)
V
V
V
V
(V
V
out(+B / 2)
out(–B / 2)
out(+B)
out(–B)
V
CC
CC
– V
CC
CC
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
–
)
V
out(–B)
5 V
Sens
–
out(q)
–
5 V
V
V
V
– V
– V
out(q)(5V)
out(q)
out(q)
( V
out(q)
out(q)
%
%
%
%
%
(4)
(5)
(6)
(7)
(8)
6