MLX90360KGO-ACD Datasheet, PDF (21/35 Pages) Melexis Microelectronic Systems – TriaxisÒ Position Sensor IC

MLX90360
Triaxis^® Position Sensor IC
14.5.1. Hysteresis Filter
The FHYST parameter is a hysteresis filter. The output value of the IC is not updated when the digital step
is smaller than the programmed FHYST parameter value. The output value is modified when the
increment is bigger than the hysteresis. The hysteresis filter reduces therefore the resolution to a level
compatible with the internal noise of the IC. The hysteresis must be programmed to a value close to the
noise level.
14.5.2. FIR Filters
The MLX90360 features 2 FIR filter modes controlled with Filter = 1…2. Filter = 0 corresponds to no
filtering. The transfer function is described below:
y_n =
1
j
j
a_i x_n−i
a i=0
i
i=0
The filters characteristics are given in the following table:
V
!
. 88)() ")
)
>&
)/
:88)() (! &3 ?
) "*
4) ) / &
8)
:5 "6)#9
6)#9
1
1
30000
20000
Digital value
[16bits]
10000
No filtering
FIR2 [1111]
FIR1 [11]
0
0
MLX90360
Rev. 009
10
20 Time [samples] 30
40
50
Page 21 of 35
Datasheet
Dec/13