FUJITSU MB91460 SERIES FR60 - Manual (Page 924)

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Chapter 44 A/D Converter
7.Caution
• Overall error
Difference between an actual vale and a theoretical value, containing a zero transition error/full transition
error/linearity error
1LSB’(Ideal value) =
AVRH - AV SS
[V]
1024
V OT ’ (Ideal value) = AV SS + 0.5LSB’ [V]
V FST ’ (Ideal value) = AVRH - 1.5LSB’ [V]
Overall error of digital output N =
V NT - {1LSB’
× (N - 1) + 0.5LSB’}
1LSB’
V
NT
: Voltage at which digital output transit from (N+1) to N
0.5 LSB’
1.5 LSB’
3FF
3FE
3FD
004
003
002
001
Ideal characteristics
Actual conversion characteristics
Actual conversion characteristics
V NT
(Measurement
value)
{1LSB (N- 1)+0.5LSB}
AVss AVRH
Digital output
Analog input
Overall error
-