A1374LKB Allegro Microsystems Inc, A1374LKB Datasheet - Page 15

• Manufacturer Part Number: A1374LKB
• Description: IC SENSOR HALL EFFECT PREC 3-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Bipolar or Unipolar, Programmabler

Specifications of A1374LKB

• Sensing Range: 1.75mV/G ~ 11.25mV/G
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 10mA
• Current - Output (max): 10mA
• Output Type: Analog, Ratiometric
• Features: High Precision
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A1373
A1374
Quiescent Output Voltage. In the quiescent state (no signifi-
cant magnetic field: B = 0), the output, V
the supply voltage, V
of V
tolerances and thermal considerations, there is a tolerance on the
quiescent output voltage, ∆V
∆V
put voltage as a function of temperature, ∆V
as:
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
Ratiometric. The A1373 and A1374 feature ratiometric
output. This means that the quiescent voltage output, V
CC
CC
and ∆T
and ambient temperature, T
Sens
V
A
OUTQ(
and
(
. For purposes of specification, the quiescent out-
Sens
=
OUTQ
CC
Sens
=
=
, throughout the entire operating ranges
(
Sens
V
toward the V
V
OUT(–B)
OUTQ
(∆T
OUTQ(
–
( ºC
OUT
A
Sens
)
, which is a function of both
(%) is defined as:
, in proportion to the magnetic
A
Sens
–
B
( ºC
. Due to internal component
V
–
OUT(+B
( ºC
CC
V
OUTQ
OUTQ( ºC
rail. Conversely, the
OUTQ(∆T
, equals a ratio of
High Precision, Output Pin Programmable
Characteristic Definitions
%
A
)
, is defined
OUTQ
(1)
(2)
(3)
,
magnetic sensitivity, Sens, and clamp voltage, V
proportional to the supply voltage, V
The ratiometric change in the quiescent output voltage,
RAT
the ratiometric change in sensitivity is defined as:
and the ratiometric change in clamp voltage is defined as:
Note that clamping effect is applicable only when clamping is
enabled by programming of the device.
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:
RAT
VOUT(Q)
Linear Hall Effect Sensor ICs
RAT
RAT
VOUT(Q)
Sens
VCLP
Lin–
Lin+
Sym
(%), is defined as:
=
=
=
=
=
=
Sens
V
OUTQ(V
V
V
V
OUT(–B½)
V
(V
OUT(–B)
CLP(V
V
V
V
OUT(+B)
V
CC
OUT(+B½)
OUTQ
OUT(+B)
CC
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
CC
V
V
CC
CC
CC
)
)
– V
–
5 V
Sens
–
– V
V
–
OUT(–B)
OUTQ
– V
V
V
V
5 V
5 V
OUTQ
( V
V
OUTQ
CLP(5V)
OUTQ(5V)
OUTQ
OUTQ
CC
.
%
%
OUTCLP
%
%
%
%
, are
(4)
(5)
(6)
(7)
(8)
(9)
14