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A1667 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. A1667
Description  True Zero-Speed, High Accuracy, Ring Magnet Sensor IC
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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 4 page
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True Zero-Speed, High Accuracy, Ring Magnet Sensor IC
A1667
4
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
OPERATING CHARACTERISTICS (continued): Valid over operating voltage and temperature ranges, unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
CALIBRATION
Initial Calibration[6]
CALI
Possible reduced edge detection accuracy, duty
cycle not guaranteed
1
6
electrical
edge
Update Method
Running mode operation, bounded for
decreasing BSIG, unlimited for increasing BSIG
Continuous
OPERATING CHARACTERISTICS
Operating Signal Range
BSIG
Differential magnetic signal
operation within specification
30
1400
G
Relative Repeatability[7]
TθE
60 pole-pair target, using 100 GPK-PK ideal
sinusoidal signal, TA = 150°C, and fOP = 1000 Hz
0.12
degrees
Maximum Single Outward Sudden Air
Gap Change[8]
AGMAX
Single instantaneous air gap peak-to-peak
amplitude change, fOP<500 Hz, VPROC(pk-pk) >
VLOE after sudden AG change
40
%PK-PK
[1]
Typical data is at VCC = 12 V and TA = 25°C, unless otherwise noted. Performance may vary for individual units, within the specified maximum and
minimum limits.
[2]
Sustained voltages beyond the clamp voltage may cause permanent damage to the IC.
[3]
Power-On Time is the time required to complete the internal Automatic Offset Adjust; the DACs are then ready for peak acquisition.
[4]
The device compensates for magnetic and installation offsets. Offsets greater than specification in gauss may cause inaccuracies in the output.
[5]
1 G (gauss) = 0.1 mT (millitesla).
[6]
For power-on frequency, fOP < 200 Hz. Higher power-on frequencies may result in more input magnetic cycles until full output edge accuracy is
achieved, including the possibility of missed output edges.
[7]
The repeatability specification is based on statistical evaluation of a sample population, evaluated at 1000 Hz.
[8]
Single maximum allowable air gap change in outward direction (increase in air gap).




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