MLX90372 datasheet(23/83 Pages) MELEXIS

23 / 83 page

ML90372 Triaxis® Position Processor

Datasheet

REVISION 7 - March 23, 2018

Page 23 of 83

3901090372

8. Magnetic Field Specifications

Magnetic field specifications are valid for temperature range [-40; 160] °C unless otherwise noted.

8.1. Rotary Stray-field Immune Mode - Low Field Variant (-100 code)

Parameter

Symbol

Min

Typ

Max

Unit

Condition

Number of magnetic poles

(13)

Magnetic Flux Density in X-

Y plane

BX, BY

(14)

(15)

√��2 + ��2

(this is not the useful signal)

Magnetic Flux Density in Z

100

(this is not the useful signal)

Magnetic in-plane gradient

of in-plane field component

∆��

3.8

√(

��

−

��

)

+ (

��

)

this is the useful signal (see fig. 8)

Magnet Temperature

Coefficient

TCm

-2400

ppm

°C

Field Strength Resolution

(16)

∆��

0.075

0.100

0.125

mm LSB

Magnetic field gradient norm

(12bits data)

Field too Low Threshold

(17)

BTH_LOW

0.8

1.2

(18)

Typ is recommended value to be

set by user (see 13.5.4)

Field too High Threshold

(17)

BTH_HIGH

100

(19)

102

(19)

Field too low Threshold

code

(17)

DIAG_

FIELDTOOLOW

THRES

LSB

decimal value

Field too high Threshold

code

(17)

DIAG_

FIELDTOOHIGH

THRES

250

LSB

decimal value

Table 21 - Magnetic specification for rotary stray-field immune- low field variant

Nominal performances apply when the useful signal ∆��/∆�� is above the typical specified limit. Under

this value, limited performances apply. See 8.1 for accuracy specifications. Stray-field immunity is tested

according to ISO 11452-8:2015.

13 Due to 4 poles magnet usage, maximum angle measurement range is limited to 180°

14 The condition must be fulfilled for all combinations of B

X and BY.

15 Above this limit, the IMC® starts to saturate, yielding to an increase of the linearity error.

16 Only valid with default MAGNET_SREL_T[1..7] configuration

17 Typ. value is set by default for NVRAM rev.9 and shall be set by user for rev.8 (see Table 49, USER_ID3 and 13.5.4)

18 Higher values of Field too Low threshold are not recommended by Melexis and shall only been set in accordance with the

magnetic design and taking a sufficient safety margin to prevent fals e positive.

19 Due to the saturation effect of the IMC, the FieldTooHigh monitor detects only defects in the sensor

MLX90372 Datasheet(PDF) 23 Page - Melexis Microelectronic Systems

MLX90372 Datasheet(HTML) 23 Page - Melexis Microelectronic Systems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

Datasheet Download

Link URL