A1351KKTTN-T Allegro Microsystems Inc, A1351KKTTN-T Datasheet - Page 8

• 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
Power-On Time
voltage, the device requires a finite time to power its internal
components before supplying a valid PWM output duty cycle.
Power-On Time, t
voltage to settle within ±5% D of its steady state value with no
applied magnetic field, after the power supply has reached its
minimum specified operating voltage, V
Response Time
magnetic field reaches 90% of its final value, and b) when the
device reaches 90% of its output corresponding to the applied
magnetic field.
Settling Time After Removal of Overload Magnetic Field
pulse width modulated output, PWMOUT, of the Hall element
requires a finite time to recover from an overload magnetic field.
The amount of time, t
the overload is defined as: the time it takes for the quiescent Hall
output duty cycle, D
state value after the overload field has fallen below 100 G. For
this specification the overload field should step from 5000 G to
0 G in less than 1ms.
Quiescent Voltage Output
magnetic field: B = 0 G), the output duty cycle, D
specific programmed duty cycle throughout the entire operating
ranges of V
Guaranteed Quiescent Duty Cycle Output Range
cent duty cycle output, D
nal value of 50% D or 10% D, within the guaranteed quiescent
duty cycle range limits: D
guaranteed programming range for D
tions of the initial, D
for setting D
CC
D
Distribution
Initial D
(Q)
(Q)init
and ambient temperature, T
, as shown in the following diagram.
(typ)
When the supply is ramped to its operating
The time interval between a) when the applied
PO
(Q)
OUT(Q)
, is defined as: the time it takes for the output
(Q)init
SETTLE
D
(Q)
(min)
Guaranteed D
(Q)
(Q)
, and the maximum programming code
Programming
, to settle to within ±5% D of its steady
, can be programmed around its nomi-
In the quiescent state (no significant
, the device takes to recover from
(min) and D
Range
D
(Q)
with a Push/Pull, Pulse Width Modulated Output
(Q)
(Q)
(max)
CC
falls within the distribu-
(Q)
A
Max Code D
(min).
.
(max). The available
Distribution
High Precision Linear Hall Effect Sensor IC
Characteristic Definitions
(Q)
The quies-
, equals a
(Q)
The
Average Quiescent Voltage Output Step Size
quiescent duty cycle output step size for a single device is deter-
mined using the following calculation:
where:
Quiescent Duty Cycle Output Programming Resolution
programming resolution for any device is half of its programming
step size. Therefore, the typical programming resolution will be:
Quiescent Duty Cycle Output Drift Through Temperature
Range
erations, the quiescent duty cycle output, D
nominal value over the operating ambient temperature, T
purposes of specification, the Quiescent Duty Cycle Output Drift
Through Temperature Range, ∆D
∆D
∆D
Sensitivity
perpendicular to the branded surface of the package face,
increases the output duty cycle from its quiescent value toward
the maximum duty cycle limit. The amount of the output duty
cycle increase is proportional to the magnitude of the magnetic
field applied. Conversely, the application of a north polarity
field decreases the output duty cycle from its quiescent value.
This proportionality is specified as the magnetic sensitivity, Sens
(%D/G), of the device, and it is defined for bipolar devices as:
n is the number of available programming bits in the trim range,
2
range, and
D
n
(Q)maxcode
(Q)
(Q)(TA)
–1 is the value of the maximum programming code in the
should be calculated using the actual measured values of
Due to internal component tolerances and thermal consid-
Err
and ∆D
The presence of a south polarity magnetic field,
Step
∆D
Sens =
PGD(Q)
is the quiescent duty cycle output at code 2
(Q)
D(Q)
(Q)(25°C)
=
(typ) = 0.5 × Step
D
=
D
BPOS – BNEG
(Q)(TA)
(BPOS)
rather than programming target values.
D
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
(Q)maxcode
– D
– D
(Q)(25°C)
(Q)
(BNEG)
2
n
–1
(%D), is defined as:
D(Q)
–D
(Q)init
(typ)
(Q)
, may drift from its
,
The average
.
.
.
n
A
–1.
. For
The
(1)
(3)
(4)
(2)
8