KMA220
NXP Semiconductors
Dual channel programmable angle sensor
12.3 Linearity error
The KMA220 output signal deviation from a best straight line BSL, with the same slope as
the reference line, is defined as linearity error. The magnetic field angle is varied at fixed
temperatures for measurement of this linearity error. The output signals deviation from the
best straight line at the given temperature is the linearity error lin. It is a function of the
magnetic field angle and the temperature of the device Tamb
.
φ
meas
(deg)
φ (α, T
BSL
)
amb
φ
(α)
ref
Δφ (α, T
lin
)
amb
α (deg)
180
001aag814
Fig 8. Definition of the linearity error
12.4 Microlinearity error
is the magnetic field angle. If = 1, the microlinearity error lin is the device output
deviation from 1.
φ
meas
(deg)
φ
(α)
ref
Δφ
= 1° + Δφ (α)
μlin
meas
α (deg)
001aag815
Δα = 1°
Fig 9. Definition of the microlinearity error
KMA220
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 24 May 2012
15 of 36
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