MLX90366

Triaxis



Position Sensor Assembly feat. SENT

MLX90366

Page 22 of 34

Datasheet

Rev. 1.0

25/Jun/13

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.

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).

W = range from 65.5° up to 360°

0%

CLAMPLOW

100%

DP

LNR_Y1

LNR_Y2

LNR_Y14

LNR_Y15

LNR_Y16

CLAMPHIGH

x

x

x

x

x

x

DP + 360

360 - W

( 360 – W ) /2

( 360 – W ) /2

LNR_Y0

Figure 6 - Input range from 65.5° up to 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:

0°

360°

The placement of the discontinuity

point (0 point) is programmable.