KMA220 datasheet(17/36 Pages) NXP

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KMA220

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Product data sheet

Rev. 1 — 24 May 2012

17 of 36

NXP Semiconductors

KMA220

Dual channel programmable angle sensor

This error comprises non-linearity and temperature drift related to the room temperature.

Figure 11 shows the envelope curve for the magnitude of angular error |



ang| versus 1

for all angles



0 and all temperatures Tamb within the ambient temperature range. If 1 is

in the range of

1 around 

0, |ang| has its minimum. Here only the microlinearity error

lin and the temperature drift related to the room temperature |tempRT| occurs. If 1

deviates from



0 by more than 1 in either direction, |ang| can increase. Slope mang

defines the gradient.

Equation 5 to Equation 8 express the angular error:

for |



1 0|  1

(5)

for 1

 <|

1 0|< *

(6)

for |



1 0| *

(7)

with:

(8)

Fig 11. Envelope curve for the magnitude of angular error

001aal766

Δφμlin + Δφtemp|RT|

−α*

α0 − 1°

α0

Δφang|

α0 + 1°

α*

mang

Δφang(peak)|

α1





ang



 

lin



temp RT





ang



 

lin



temp RT

ang



–



–









ang





lin

2



temp RT

2







ang(peak)



 

lin



temp RT

–

ang

-----------------------------------------------------------------------------------





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