MLX90333LDC-BCH Melexis Inc, MLX90333LDC-BCH Datasheet - Page 27

• Manufacturer Part Number: MLX90333LDC-BCH
• Description: IC 3D-JOYSTICK POS SENSOR 8-SOIC
• Manufacturer: Melexis Inc

Specifications of MLX90333LDC-BCH

• Sensor Type: 3D
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 150°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MLX90333LDC; MLX90333LDC; Q4656097

14.6. FILTER
The MLX90333 includes 3 types of filters:
Note: if the parameter FILTERFIRST is set to “1”, the filtering is active on the digital angle. If set to “0”, the
filtering is active on the output transfer function.
14.6.1. 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.
14.6.2. FIR Filters
The MLX90333 features 6 FIR filter modes controlled with Filter = 0…5. The transfer function is described
below:
The characteristics of the filters no 0 to 5 is given in the Table 1.
3901090333
Rev. 003
90% Response Time (C
99% Response Time (C
•
•
•
Efficiency RMS (dB)
Coefficients a
Efficiency P2P (dB)
Hysteresis Filter: programmable by the FHYST parameter
Low Pass FIR Filters controlled with the Filter parameter
Low Pass IIR Filter controlled with the Filter parameter and the coefficients FILTER A1 and
FILTER A2
Filter No (j)
Type
Title
0
… a
5
T
T
)
)
FILTERFIRST
Parameter
FILTER
FHYST
No Filter
Disable
N/A
Table 1 - FIR Filters Selection Table
0
1
1
0
0
y
n
=
110000
2.9
2.9
1
2
2
∑
i
=
Page 27 of 46
j
0
1
Extra Light
0 … 11 ; step 0.04
a
i
∑
i
=
j
0
Value
121000
0… 6
a
i
4.0
3.6
0
1
2
3
3
x
n
−
Finite Impulse Response
i
Tria ⊗ is ™ Position Sensor
133100
4.7
5.0
3
4
4
Unit
deg
MLX90333
111100
Light
5.6
6.1
4
4
4
Data Sheet
122210
6.2
7.0
5
5
5
Feb. 11