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A1667 Datasheet(Hoja de datos) 9 Page - Allegro MicroSystems

No. de Pieza. A1667
Descripción  True Zero-Speed, High Accuracy, Ring Magnet Sensor IC
Descarga  15 Pages
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Fabricante  ALLEGRO [Allegro MicroSystems]
Página de inicio  http://www.allegromicro.com
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 9 page
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True Zero-Speed, High Accuracy, Ring Magnet Sensor IC
A1667
9
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Chart
Index
Magnetic Field
Peak VPROC
Amplitude
Centered Calculated Range, BHYS
Target Behavior
(Example only)
Peak Magnetic
Signal, BPK
Operate Point. BOP
(70% B(PKPK)
70% VPROC(PKPK))
Release Point. BRP
(30% B(PKPK)
30% VPROC(PKPK))
BHYS
PK(1)
TEAG small
+BPK
(South Polarity)
VPROCPK(1)
BOP(A)
(Previous state)
A
PK(2)
TEAG small
–BPK
(North Polarity)
VPROCPK(2)
BRP(A)
PK(3)
TEAG mid
+BPK
(South Polarity)
VPROCPK(3)
BOP(B)
B
PK(4)
TEAG mid
–BPK
(North Polarity)
VPROCPK(4)
BRP(B)
PK(5)
TEAG large
+BPK
(South Polarity)
VPROCPK(5)
BOP(C)
C
PK(6)
TEAG large
–BPK
(North Polarity)
VPROCPK(6)
BRP(C)
PK(7)
TEAG mid
+BPK
(South Polarity)
VPROCPK(7)
BOP(D)
D
PK(8)
TEAG mid
–BPK
(North Polarity)
VPROCPK(8)
BRP(D)
PK(9)
TEAG small
+BPK
(South Polarity)
VPROCPK(9)
(Next state)
PK(2)
PK(1)
PK(3)
PK(5)
PK(6)
PK(8)
PK(9)
PK(7)
PK(4)
BHYS(D)
BHYS(C)
t+
V+
+B
–B
BRP(A)
BOP(A)
BRP(B)
BRP(C)
BOP(C)
BRP(D)
BOP(D)
BOP(B)
BHYS(A)
BHYS(B)
Figure 5. The Continuous Update algorithm operation. Not detailed in the figure are the boundaries for peak capture DAC
movement which intentionally limit the amount of inward signal variation the IC is able to react to over a single transition. The
algorithm is used to establish and subsequently update the device switchpoints (BOP and BRP). The hysteresis, BHYS(#x), at each
target feature configuration results from this recalibration, ensuring that it remains properly proportioned and centered within the
peak-to-peak range of the internal analog signal, VPROC.




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