MLX90366 Datasheet, PDF (22/34 Pages) Melexis Microelectronic Systems – Triaxis Position Sensor Assembly feat. SENT

MLX90366
Triaxis^ Position Sensor Assembly feat. SENT
14.1.2. Discontinuity Point (or Zero Degree Point)
The Discontinuity Point defines the 0° point on the circle. The discontinuity point places the origin at any
location of the trigonometric circle. The DP is used as reference for all the angular measurements.
360°
0°
The placement of the discontinuity
point (0 point) is programmable.
Figure 5 - Discontinuity Point Positioning
14.1.3. 17-Pts LNR Parameters
The LNR parameters, together with the clamping values, fully define the relation (the transfer function)
between the digital angle and the output signal.
The shape of the MLX90366 transfer function from the digital angle value to the output voltage is
described by the drawing below. In the 16-Pts mode, the output transfer characteristic is Piece-Wise-
Linear (PWL).
LNR_Y16
100%
CLAMPHIGH
LNR_Y15
LNR_Y14
LNR_Y2
LNR_Y1
CLAMPLOW
0%
LNR_Y0
x
DP
x
x
x
x
x
( 360 – W ) /2
( 360 – W ) /2
W = range from 65.5° up to 360°
Figure 6 - Input range from 65.5° up to 360°
360 - W
DP + 360
All the Y-coordinates can be programmed from -50% up to +150% to allow clamping in the middle of one
segment (like on the figure), but the output value is limited to CLAMPLOW and CLAMPHIGH values.
Between two consecutive points, the output characteristic is interpolated.
The parameter W determines the input range on which the 17 points (16 segments) are uniformly spread:
MLX90366
Rev. 1.0
Page 22 of 34
Datasheet
25/Jun/13