A1301ELHLT-T Allegro Microsystems Inc, A1301ELHLT-T Datasheet - Page 5

• Manufacturer Part Number: A1301ELHLT-T
• Description: IC SENSOR HALL EFFECT SOT23W
• Manufacturer: Allegro Microsystems Inc
• Type: Linear - Ratiometricr

Specifications of A1301ELHLT-T

• Sensing Range: 1.8mV/G ~ 3.2mV/G
• Voltage - Supply: 4.5 V ~ 6 V
• Current - Supply: 11mA
• Current - Output (max): 10mA
• Output Type: Digital, Open Drain
• Operating Temperature: -40°C ~ 85°C
• Package / Case: SOT-23W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

A1301
A1302
Quiescent Output Voltage. In the quiescent state (no sig-
nificant magnetic field: B = 0), the output, V
half of the supply voltage, V
ranges of V
component tolerances and thermal considerations, there is a
tolerance on the quiescent output voltage, ∆V
a function of both ∆V
tion, the quiescent output voltage as a function of temperature,
∆V
where Sens is in mV/G, and the result is the device equivalent
accuracy, in gauss (G), applicable over the entire operating tem-
perature range.
Sensitivity. The presence of a south-polarity (+B) magnetic
field, perpendicular to the branded face of the device package,
increases the output voltage, V
field applied, from V
application of a north polarity (–B) magnetic field, in the same
orientation, proportionally decreases the output voltage from its
quiescent value. This proportionality is specified as the magnetic
sensitivity of the device and is defined as:
The stability of the device magnetic sensitivity as a function of
ambient temperature, ∆ Sens
OUTQ(∆T
Sens
A
V
CC
)
, is defined as:
OUTQ(
and
(
and ambient temperature, T
Sens
=
OUTQ
CC
Sens
=
=
and ∆T
(
Sens
V
toward the V
V
OUT(–B)
(∆T
CC
OUTQ(
–
( ºC
OUT
, throughout the entire operating
A
A
Sens
. For purposes of specifica-
)
(%) is defined as:
, in proportion to the magnetic
Sens
–
B
( ºC
V
–
OUT(+B
( ºC
CC
V
OUTQ( ºC
A
rail. Conversely, the
. Due to internal
OUTQ
OUTQ
Characteristic Definitions
%
, equals one
, which is
(1)
(2)
(3)
Ratiometric. The A1301 and A1302 feature a ratiometric
output. This means that the quiescent voltage output, V
and the magnetic sensitivity, Sens, are proportional to the supply
voltage, V
The ratiometric change (%) in the quiescent voltage output is
defined as:
and the ratiometric change (%) in sensitivity is defined as:
Linearity and Symmetry. The on-chip output stage is
designed to provide linear output at a supply voltage of 5 V.
Although the application of very high magnetic fields does not
damage these devices, it does force their output into a nonlinear
region. Linearity in percent is measured and defined as:
and output symmetry as:
V
Linear Hall Effect Sensor ICs
Continuous-Time Ratiometric
OUTQ( V)
Sens
CC
Lin+
Lin–
( V
Sym
.
=
=
=
=
=
Sens
V
V
V
OUTQ(V
OUT(–B½)
V
OUT(–B)
V
(V
V
V
OUT(+B)
OUT(+B½)
V
OUT(+B)
OUTQ
CC
CC
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
CC
CC
– V
–
)
5 V
–
Sens
– V
V
–
OUT(–B)
– V
OUTQ
V
V
5 V
V
OUTQ
OUTQ
OUTQ(5V)
( V
OUTQ
VOUTQ
%
%
%
%
%
OUTQ
(4)
(5)
(6)
(7)
(8)
,
5