MLX90364 Datasheet, PDF (13/36 Pages) Melexis Microelectronic Systems – Triaxis® Position Sensor Assembly

MLX90364
Triaxis® Position Sensor Assembly
100Hz
250Hz
1000Hz
11.8 13
ms
5.8
7
5.8
7
10. MLX90364 Accuracy Specification
10.1. Normal Magnetic range: 20 mT ≤ B < 70 mT
DC Operating Parameters at nominal supply voltage (unless otherwise specified) and for T_A as specified
by the Temperature suffix L.
Parameter
Symbol
Test Conditions
Min Typ Max Units
ADC Resolution on the raw
RADC
signals sine and cosine⁽¹⁰⁾
15
bits
Thermal Offset Drift #1⁽¹¹⁾
TA from -40 to 125degC
-60
at the DSP input (excl. DAC and
TA from -40 to 150degC
-90
output stage)
+60
LSB15
+90
Thermal Offset Drift #2
( DAC and Output Stage)
-0.2
+0.2
%VDD
Thermal Drift of Sensitivity
Mismatch⁽¹²⁾
XY axis
XZ (YZ) axis
- 0.5
+ 0.5
%
-1
+1
%
Magnetic Angle phase error
TA = 25°C – XY axis
TA = 25°C – XZ axis
TA = 25°C – YZ axis
-0.3
0.3
-2
2
Deg.
-2
2
Thermal Drift of Magnetic Angle
phase error
XY axis, XZ (YZ) axis
0.01
Deg.
XY – Intrinsic Linearity Error⁽¹³⁾
Le T_A = 25°C – factory trim. “SMISM”
-1
1
Deg
XZ - Intrinsic Lin. Error⁽¹³⁾
Le T_A = 25°C – “k” trimmed for XZ
-2.5 ±1.25 2.5
Deg
YZ - Intrinsic Lin. Error⁽¹³⁾
Le T_A = 25°C – “k” trimmed for YZ
-2.5 ±1.25 2.5
Deg
Analog Output Resolution
RDAC 12b DAC (Theoretical, Noise free)
0.025
INL (before EOL calibration)
-4
DNL
0.05
1
%VDD/LSB12
+4
LSB12
3
LSB12
Output stage Noise
Clamped Output
0.05 0.075 %VDD
Noise pk-pk⁽¹⁴⁾
Filter 0, B1 or B2 > 40mT
0.10 0.2
Deg
10 _{16 bits corresponds to 15 bits + sign. Internal computation is performed using 16 bits.}
11 _{For instance, in case of a rotary position sensor application, Thermal Offset Drift #1 equal ± 60LSB15 yields to max. ± 0.3 Deg.}
angular error for the computed angular information (output of the DSP). This is only valid if k = 1.
12 _{For instance, in case of a rotary position sensor application, Thermal Drift of Sensitivity Mismatch equal ± 0.5% yields to max.}
± 0.15 Deg. angular error for the computed angular information (output of the DSP). See “MLX90364 Front-End Application Note”
for more details.
13 _{The Intrinsic Linearity Error refers to the IC itself (offset, sensitivity mismatch, orthogonality) taking into account an ideal}
rotating field for BX and BY. Once associated to a practical magnetic construction and the associated mechanical and magnetic
tolerances, the output linearity error increases. However, it can be improved with the multi-point end-user calibration. The intrinsic
Linearity Error for Magnetic angle ∠XZ and ∠YZ can be reduced through the programming of the k factor.
14 _{Noise pk-pk (peak-to-peak) is here intended as 6 times the Noise standard Deviation. The application diagram used is}
described in the recommended wiring. For detailed information, refer to section Filter in application mode (Section 15.6).
MLX90364
Rev 4.1
Page 13 of 36
Datasheet
19/11/2015