A1351KKTTN-T Allegro Microsystems Inc, A1351KKTTN-T Datasheet - Page 10

• 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
Symmetry Sensitivity Error
A1351 device is constant for any two applied magnetic fields of
equal magnitude and opposite polarities.
Symmetry error, Sym
where Sens
positive and negative magnetic fields such that |B
Note that the symmetry error specification is only valid for bipolar
devices.
Duty Cycle Jitter
slightly over time despite:
• the presence of a constant applied magnetic field, and
• a constant carrier frequency for the PWM signal.
Bx
Sym
is as defined in equation 4, and B
ERR
The duty cycle of the PWM output may vary
=
ERR
⎛
⎜ ⎜
⎝
1–
(%), is measured and defined as:
Sens
Sens
The magnetic sensitivity of an
BNEG
BPOS
Jitter is instability or small rapid irregularity about a specific data position in
a periodic electrical signal waveform from cycle to cycle. In this figure, the
A1351 PWM Output jitter is ±0.025% D at 25°C, Sens = 0.095% D/G.
with a Push/Pull, Pulse Width Modulated Output
⎞
⎟ ⎟
⎠
×
100%
High Precision Linear Hall Effect Sensor IC
POS
,
POS
and B
| = |B
NEG
NEG
t
PERIOD
(13)
|.
are
±Jitter
This phenomenon is known as jitter, and is defined as:
where %D
mum duty cycles measured the over 1000 PWM clock periods
with a constant applied magnetic field. J
figure below).
Duty Cycle Resolution
applied magnetic field from the device output is affected by jitter.
The resolution of the magnetic field, in Gauss (G), is defined as:
B
J
D
(max) and %D
= ±
RES =
%D
The ability to know the value of the
B
(max) – %D
B
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
(min) are the maximum and mini-
Sens
J
DC
2
B
(min)
.
D
is given in %D (see
,
(14)
(15)
10