mb90f378 Fujitsu Microelectronics, Inc., mb90f378 Datasheet - Page 57

• Manufacturer Part Number: mb90f378
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

6. A/D Converter Glossary
Resolution : Analog changes that are identifiable with the A/D converter.
Linearity error : The deviation of the straight line connecting the zero transition point (“00 0000 0000” ↔
Differential linearity error : The deviation of input voltage needed to change the output code by 1 LSB from the
Total error : The total error is defined as a difference between the actual value and the theoretical value, which
Total error for digital output N =
1 LSB (Theoretical value) =
includes zero-transition error/full-scale transition error and linearity error.
V
V
V
OT
FST
NT
“00 0000 0001”) with the full-scale transition point (“11 1111 1110” ↔ “11 1111 1111”) from
actual conversion characteristics.
(Theoretical value) = AVss + 0.5 LSB [V]
: Voltage at a transition of digital output from (N − 1) to N
(Theoretical value) = AVR − 1.5 LSB [V]
3FD
theoretical value.
3FE
3FF
004
003
002
001
H
H
H
H
H
H
H
AVRL
Actual conversion
value
AVR − AVss
0.5 LSB
1024
Total error
V
Analog input
Theoretical
characteristics
NT
− {1 LSB × (N − 1) + 0.5 LSB}
[V]
Actual conversion
value
{1 LSB × (N − 1) + 0.5 LSB}
1 LSB
(Measured value)
V
NT
0.5 LSB
AVRH
MB90378 Series
[LSB]
(Continued)
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