A1351KKTTN-T Allegro Microsystems Inc, A1351KKTTN-T Datasheet - Page 9

• Manufacturer Part Number: A1351KKTTN-T
• Description: IC,HALL-EFFECT SENSOR,SINGLE-ENDED,BICMOS,SIP,4PIN,PLASTIC
• Manufacturer: Allegro Microsystems Inc
• Type: Linear - Unipolar, Bipolarr

Specifications of A1351KKTTN-T

• Sensing Range: 0.055% ~ 0.095% DC/G
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 10mA
• Current - Output (max): 1mA
• Output Type: Digital, Push-Pull
• Features: High Precision
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 4-SIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A1351
and for unipolar devices as:
where BPOS and BNEG are two magnetic fields with opposite
polarities.
Guaranteed Sensitivity Range
can be programmed around its nominal value within the sensitiv-
ity range limits: Sens(min) and Sens(max). Refer to the Guaran-
teed Quiescent Duty Cycle Output Range section for a conceptual
explanation of how value distributions and ranges are related.
Average Sensitivity Step Size
Duty Cycle Output Step Size section for a conceptual explana-
tion.
Sensitivity Programming Resolution
Duty Cycle Output Programming Resolution section for a con-
ceptual explanation.
Carrier Frequency Programming Range
nal carrier frequency, f
nal value within the carrier frequency range limits, f
and f
Output Range section for a conceptual explanation of how value
distributions and ranges are related.
Average Carrier Frequency Step Size
Quiescent Duty Cycle Output Step Size section for a conceptual
explanation.
Carrier Frequency Programming Resolution
escent Duty Cycle Output Programming Resolution section for a
conceptual explanation.
Sensitivity Temperature Coefficient
as temperature changes, with respect to its programmed sensitiv-
ity temperature coefficient, TC
125°C, and calculated relative to the nominal sensitivity program-
ming temperature of 25°C. TC
where T1 is the nominal Sens programming temperature of 25°C,
and T2 is the TC
ideal value of Sens over the full ambient temperature range,
Sens
Sens
values of Sens
Sens
EXPECTED(TA)
EXPECTED(TA)
PWM
EXPECTED(TA)
TC
(max). Refer to the Guaranteed Quiescent Duty Cycle
Sens
T1
=
and TC
SENS
Sens =
, is defined as:
should be calculated using the actual measured
⎛
⎜ ⎜
⎝
Sens
programming temperature of 125°C. The
=
PWM
Sens
T2
SENS
Sens
– Sens
D
,can be programmed around its nomi-
T1
rather than programming target values.
(BPOS)
T1
SENS
SENS
BPOS
Refer to the Average Quiescent
[1 + TC
The magnetic sensitivity, Sens,
T1
×
– D
. TC
(%/°C) is defined as:
with a Push/Pull, Pulse Width Modulated Output
100%
Device sensitivity changes
(Q)
Refer to the Quiescent
SENS
Refer to the Average
SENS
⎞
⎟ ⎟
⎠
The PWM output sig-
⎛
⎜ ⎜
⎝
T2–T1
High Precision Linear Hall Effect Sensor IC
is programmed at
(T
1
A
Refer to the Qui-
,
–T1) / 100%]
⎞
⎟ ⎟
⎠
PWM
,
(min)
(5)
(6)
(7)
Sensitivity Drift Through Temperature Range
sensitivity temperature coefficient effects cause the magnetic sen-
sitivity, Sens, to drift from its expected value over the operating
ambient temperature range, T
sensitivity drift through temperature range, ∆Sens
as:
Sensitivity Drift Due to Package Hysteresis
relaxation can cause the device sensitivity at T
during and after temperature cycling.
For purposes of specification, the sensitivity drift due to package
hysteresis, ∆Sens
where Sens
ity at T
T
–40°C, and back to up 25°C.
Linearity Sensitivity Error
linear output in response to a ramping applied magnetic field.
Consider two magnetic fields, B1 and B2. Ideally, the sensitivity
of a device is the same for both fields, for a given supply voltage
and temperature. Linearity error is present when there is a differ-
ence between the sensitivities measured at B1 and B2.
Linearity Error is calculated separately for the positive
(Lin
Linearity error (%) is measured and defined as:
where:
and B
with respect to the quiescent voltage output such that
B
Note that unipolar devices only have positive linearity error,
Lin
A
POS2
= 25°C, after temperature cycling T
ERRPOS
ERRPOS
POSx
= 2 × B
A
∆Sens
∆Sens
= 25°C, and Sens
.
and B
Lin
(25°C)1
) and negative (Lin
Lin
Lin
PKG
ERRNEG
POS1
TC
ERRPOS
Sens
ERR
NEGx
PKG
=
is the programmed value of sensitiv-
=
and B
Bx
=
Sens
, is defined as:
Sens
are positive and negative magnetic fields,
=
=
max( Lin
=
⎛
⎜ ⎜
⎝
⎛
⎜ ⎜
⎝
Sens
TA
1–
1–
NEG2
|D
(25°C)2
(25°C)2
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
– Sens
The 1351 is designed to provide a
Sens
Sens
Sens
Sens
(Bx)
EXPECTED(TA)
A
Sens
ERRNEG
. For purposes of specification, the
= 2 ×B
B
ERRPOS
–
– Sens
BNEG1
BPOS2
BPOS1
BNEG2
x
is the value of sensitivity at
EXPECTED(TA)
(25°C)1
D
(Q)
NEG1
) applied magnetic fields.
⎞
⎟ ⎟
⎠
⎞
⎟ ⎟
⎠
, Lin
A
|
(25°C)1
×
×
up to 125°C, down to
100%
100%
. Then:
ERRNEG
×
A
Package stress and
100%
,
×
= 25°C to change
Second order
,
,
100%
TC
)
, is defined
.
,
.
(10)
(11)
(12)
(8)
(9)
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