MLX90366 datasheet(13/34 Pages) MELEXIS

13 / 34 page

MLX90366

Triaxis



Position Sensor Assembly feat. SENT

MLX90366

Page 13 of 34

Datasheet

Rev. 1.0

25/Jun/13

MLX90366 Accuracy Specification

DC Operating Parameters at VDD = 5V (unless otherwise specified) and for TA as specified by the

Temperature suffix (L).

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

ADC Resolution on the raw

signals sine and cosine(5)

RADC

bits

Thermal Offset Drift #1(6)

at the DSP input (excl. DAC and

output stage)

TA from -40 to 125°C

TA from -40 to 150°C

-60

-90

+60

+90

LSB15

Thermal Drift of Sensitivity

Mismatch(7)

XY axis

XZ (YZ) axis

- 0.5

-1

+ 0.5

Magnetic Angle phase error

TA = 25

C – XY axis

TA = 25

C – XZ axis

TA = 25

C – YZ axis

-0.3

-2

0.3

Deg.

Thermal Drift of Magnetic Angle

phase error

XY axis, XZ (YZ) axis

0.01

Deg.

XY – Intrinsic Linearity Error(8)

TA = 25

C – factory trim. “SMISM”

-1

Deg

XZ - Intrinsic Lin. Error(11)

TA = 25

C – “k” trimmed for XZ

-2.5

1.25

2.5

Deg

YZ - Intrinsic Lin. Error(11)

TA = 25

C – “k” trimmed for YZ

-2.5

1.25

2.5

Deg

Noise pk-pk(9)

FILTER = 0, 40mT

FILTER = 1 (recommended) , 30mT

0.10

0.2

Deg

16 bits corresponds to 15 bits + sign. Internal computation is performed using 16 bits.

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. “MLX90365 Front-End

Application Note” will be released for more details.

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 “MLX90365 Front-End Application Note”

for more details.

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.

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 14.4).

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