A1698 Datasheet, PDF (5/13 Pages) Allegro MicroSystems – Two-Wire, True Zero-Speed, High Accuracy

A1698
Two-Wire, True Zero-Speed, High Accuracy
Sensor IC with Speed and Direction Output
1
A1698
C_SUPPLY
2
R_L
100 Ω
C_L
V_SUPPLY
Figure 1: Typical Application Circuit
B_SEQ(n)
B_SEQ(n+1)
Figure 2: Differential Signal Variation
Target
S
N
S
N
V_PROC
T_TARGET
T_VPROC
V_PROC = the processed analog signal of the sinusoidal
magnetic input (per channel)
T_TARGET = the period between successive sensed target
magnetic edges of the same polarity (either
both north-to-south or both south-to-north)
Figure 3: Definition of T_TARGET
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