MLX90333KGO MELEXIS [Melexis Microelectronic Systems], MLX90333KGO Datasheet - Page 23

• Manufacturer Part Number: MLX90333KGO
• Description: Triaxis 3D-Joystick Position Sensor
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

14.5. Sensor Front-End
14.5.1. HIGHSPEED Parameter
The HIGHSPEED parameter defines the main frequency for the DSP.
For better noise performance, the Slow Mode must be enabled.
14.5.2. GAINMIN and GAINMAX Parameters
The MLX90333 features an automatic gain control (AGC) of the analog chain. The AGC loop is based on
and it targets an amplitude of 90% of the ADC input span.
The current gain can be read out with the programming unit PTC-04 and gives a rough indication of the
applied magnetic flux density (Amplitude).
GAINMIN & GAINMAX define the boundaries within the gain setting is allowed to vary. Outside this range,
the outputs are set in diagnostic low.
14.5.3. FIELDTHRES_MIN and FIELDTHRES_MAX Parameters
The strength of the applied field is constantly calculated in a background process. The value of this field
can be read out with the PTC-04 and
FIELDTHRES_MIN & FIELDTHRES_MAX define the boundaries within the actual field strength (Radius)
is allowed to vary. Outside this range, the outputs are set in diagnostic low.
3901090333
Rev. Preliminary
•
•
HIGHSPEED = 0 selects the Slow mode with a 7 MHz master clock.
HIGHSPEED = 1 selects the Fast mode with a 20 MHz master clock.
FIELDTHRES_MAX
FIELDTHRES_MIN
HIGHSPEED
Parameter
GAINMAX
(V
GAINMIN
X
)²+ (V
Y
)² + (V
Z
)² = (Amplitude)² = (Radius)²
Page 23 of 38
Triaxis 3D-Joystick Position Sensor
0 = Slow mode
1 = Fast mode
0 … 100
0 … 100
0 … 41
0 … 41
Value
Unit
%
%
MLX90333
Data Sheet
May 07