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A1356 Datasheet, PDF (4/20 Pages) Allegro MicroSystems – High Precision Linear Hall-Effect Sensor
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A1356
High Precision Linear Hall-Effect Sensor
With an Open Drain Pulse Width Modulated Output
OPERATING CHARACTERISTICS (continued) Valid over full operating temperature range, TA , VCC = 4.5 to 18 V,
CBYPASS = 0.1 μF, unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Sensitivity Programming
Initial Sensitivity
Guaranteed Sensitivity Range
Sensitivity Programming Bits
Sensinit TA = 25°C
SensLOW TA = 25°C
–
SensPRE
–
45
–
75
–
8
–
Average Sensitivity Step Size8,9
Sensitivity Programming Resolution10
StepSENS(low) TA = 25°C
ErrPGSENS TA = 25°C
150
300
450
–
StepSENS
× ±0. 5
–
Carrier Frequency Programming
Initial Carrier Frequency
Carrier Frequency Programming Range
Carrier Frequency Programming Bits
fPWMinit
fPWM
TA = 25°C
TA = 25°C
–
fPWMPRE
–
1.8
2
2.2
–
4
–
Average Carrier Frequency Step Size8,9
Carrier Frequency Programming
Resolution10
StepfPWM TA = 25°C
ErrPGfPWM TA = 25°C
90
114
140
–
StepfPWM
× ±0. 5
–
Calibration Test Mode
Calibration Test Mode Duration3
Output Duty Cycle During Calibration
Mode3
tCAL
DCAL
fPWM = 2 kHz
TA = 25°C
45
50
55
49
50
51
Lock Bit Programming
Overall Programming Lock Bit
LOCK
–
1
–
Factory Programmed Sensitivity Temperature Coefficient And Drift Characteristics
Sensitivity Temperature Coefficient11
Sensitivity Drift Through Temperature
Range12
SensTC TA = 150°C
ΔSensTC TA = 150°C
–
0.03
–
–
< ±3
–
Sensitivity Drift Due to Package
Hysteresis2
ΔSensPKG TA = 150°C, after temperature cycling
–
< ±1
–
Factory Programmed Duty Cycle Drift
Duty Cycle Temperature Coefficient11
Quiescent Duty Cycle Drift Through
Temperature Range
DTC
ΔD(Q)
TA = 150°C
Sens = SensPRE, TA = 150°C
–
0
–
–
< ±0.35
–
Unit
(% D)/G
(m% D)/G
bit
(μ% D)/G
(μ% D)/G
Hz
kHz
bit
Hz
Hz
ms
%D
bit
%/°C
%
%
(% D)/°C
%D
Continued on the next page…
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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