MLX90316KDC-BDG Datasheet, PDF (20/45 Pages) Melexis Microelectronic Systems – Rotary Position Sensor IC

360°
0°
MLX90316
Rotary Position Sensor IC
The placement of the discontinuity
point (0 point) is programmable.
14.2.3. LNR Parameters
Figure 10 - Discontinuity Point Positioning
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 MLX90316 transfer function from the digital angle value to the output voltage is
described by the drawing below. Six segments can be programmed but the clamping levels are
necessarily flat.
Two, three, or even five calibration points are then available, reducing the overall non-linearity of the IC by
almost an order of magnitude each time. Three or five point calibration will be preferred by customers
looking for excellent non-linearity figures. Two-point calibrations will be preferred by customers looking for
a cheaper calibration set-up and shorter calibration time.
100 %
CLAMPHIGH
LNR_C_Y
Clamping High
C
Slope LNR_C_S
LNR_B_Y
LNR_A_Y
CLAMPLOW
0%
0
B
Slope LNR_B_S
A
Slope LNR_A_S
Slope LNR_S0
LNR_A_X
LNR_B_X
LNR_C_X
Clamping Low
360
(Deg.)
14.2.4. CLAMPING Parameters
The clamping levels are two independent values to limit the output voltage range. The CLAMP_LOW
parameter adjusts the minimum output voltage level. The CLAMP_HIGH parameter sets the maximum
output voltage level. Both parameters have 16 bits of adjustment. In analog mode, the resolution will be
limited by the D/A converter (12 bits) to 0.024%VDD. In PWM mode, the resolution will be 0.024%DC. In
SPI mode, the resolution is 14bits or 0.022deg over 360deg.
3901090316
Rev10
Page 20 of 45
Jul/13