mb95f156npmt Fujitsu Microelectronics, Inc., mb95f156npmt Datasheet - Page 54

• Manufacturer Part Number: mb95f156npmt
• Description: 8-bit Microcontroller Cmos 2 F2mc-8fx Mb95150m Series
• Manufacturer: Fujitsu Microelectronics, Inc.

54
MB95150M Series
(3) Definition of A/D Converter Terms
• Resolution
• Linearity error (unit : LSB)
• Differential linear error (Unit : LSB)
• Total error (unit: LSB)
The level of analog variation that can be distinguished by the A/D converter.
When the number of bits is 10, analog voltage can be divided into 2
The deviation between the value along a straight line connecting the zero transition point
(“00 0000 0000” ← → “00 0000 0001”) of a device and the full-scale transition point
(“11 1111 1111” ← → “11 1111 1110”) compared with the actual conversion values obtained.
Deviation of input voltage, which is required for changing output code by 1 LSB, from an ideal value.
Difference between actual and theoretical values, caused by a zero transition error, full-scale transition error,
linearity error, quantum error, and noise.
1 LSB =
3FF
3FE
3FD
004
003
002
001
N : A/D converter digital output value
V
H
H
H
H
H
H
H
NT
V
SS
: A voltage at which digital output transits from (N − 1)
V
OT
V
CC
0.5 LSB
1024
Ideal I/O characteristics
− Vss
Analog input
1 LSB
(V)
V
FST
1.5 LSB
V
digital output N
CC
Total error of
3FF
3FE
3FD
004
003
002
001
H
H
H
H
H
H
H
V
SS
{1 LSB
Actual conversion
characteristic
=
V
H
×
NT
(N
to N
10
− {1 LSB × (N − 1) + 0.5 LSB}
= 1024.
− 1) +
Ideal characteristics
Analog input
H
Total error
0.5 LSB}
1 LSB
Actual conversion
characteristic
V
NT
V
CC
(Continued)
[LSB]