Philips Semiconductors
Magnetoresistive sensors for
magnetic field measurement
General
SENSOR TEMPERATURE DRIFT
The sensitivity of MR sensors is also temperature dependent, with sensitivity decreasing as temperature increases (Fig.31).The effect on sensor output is certainly
not negligible, as it can produce a difference of a factor of three within a −25 °C to +125 °C temperature range, for fields up to 0.5 kA/m. This effect is not compensated for by the flipping action described in the last section.
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| MLC134 |
handbook, full pagewidth |
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| VO |
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| T | = | 25oC | |
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| 25oC |
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| 75oC |
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| 125oC |
| 0 |
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| 5 |
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| 10 |
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| operating range |
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| 3 | 2 | 0 | 1 |
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| H y (kA/m) | |
Fig.31 Output voltage ‘Vo’ as a fraction of the supply voltage for a KMZ10B sensor, as a function of transverse field ‘Hy’, at several temperatures.
2000 Sep 06 | 26 |
