IC-MV Datasheet, PDF (12/28 Pages) IC-Haus GmbH – 8-BIT HALL ENCODER

iC-MV 8-BIT HALL ENCODER WITH
CASCADABLE SERIAL INTERFACE
V
SIN = PSIN - NSIN
COS = PCOS - NCOS
preliminary
Rev B1, Page 12/28
( ) ^{α = arctan}
SIN
COS
0
0°
90°
180°
270°
α
Figure 6: Analog Signals (differential)
SIN
α
COS
The magnet’s zero angle position is characterized by
the resulting cosine voltage value being maximized and
the sine voltage value being zero.
This is the case when the magnet’s south pole is lo-
cated exactly above sensor PCOS and the north pole
exactly above sensor NCOS. Sensors PSIN and NSIN
are located along the pole threshold so that both do not
generate a Hall signal.
Figure 7: XY Plot and Angle Function
With further clockwise rotation of the magnet the poles
then overlap the PSIN and NSIN sensors so that the
sine voltage value maximized. Sine and cosine signals
are generated which represent the angle position of the
magnet α (Figure 7).
All Hall sensor signals can be switched to the outside
for test purposes.
Figure 8: Converter Resolution