MLX90365 Datasheet, PDF (22/35 Pages) Melexis Microelectronic Systems – Triaxis® Position Sensor IC

MLX90365
Triaxis® Position Sensor IC
MAPXYZ
0 – 00b
1 – 01b
2 – 10b
3 – 11b
B1
B2
Angular
X
Y
XY mode
Zx
X
XZx mode
Y
Zx
YZx mode
Y
Zy
YZy mode
Note: MAPXYZ = 3 is not recommended.
14.5.2. SMISM, k and SEL_k Parameters
(i) SMISM
When the mapping (B1=X, B2=Y) is selected, SMSIM defines the sensitivity mismatch factor that is
applied on B1, B2; When another B1, B2 mapping is selected, this parameter is “don’t care”.
This parameter is trimmed at factory; Melexis strongly recommends TO NOT overwrite it for optimal
performances.
(ii) k
When the mapping (B1=X, B2=Y) is NOT selected, k defines the sensitivity mismatch factor that is applied
on B1or B2 (according to parameter SEL_k – see below). When the mapping (B1=X, B2=Y) is selected,
this parameter is “don’t care”.
This parameter is trimmed at factory for mapping (B1=Z, B2=X). Melexis recommends to fine trim it when
a smaller linearity error (Le) is required and a different mapping than (B1=X, B2=Y) is selected.
(iii) SEL_k
When the mapping (B1=X, B2=Y) is NOT selected, SEL_k defines the component on which the sensitivity
mismatch factor k (see above): SEL_k = 0 means B1→ k ⋅ B1 and SEL_k = 1 means B2 → k ⋅ B2.
14.5.3. GAINMIN and GAINMAX Parameters
GAINMIN and GAINMAX define the thresholds on the gain code outside which the fault “GAIN out of
Spec.” is set;
If GAINSATURATION is set, then the virtual gain code is saturated at GAINMIN and GAINMAX, and no
Diagnostic fault is set since the saturations applies before the Diag. check.
14.6. Filter
Parameter
FILTER
FHYST
Value
0…2
0 … 255
The MLX90365 includes 2 types of filters:
• Hysteresis Filter: programmable by the FHYST parameter
• Low Pass FIR Filters controlled with the FILTER parameter
MLX90365
Rev. 5.7
Page 22 of 35
Datasheet
Jan. 22, 16