MB2146-301A Fujitsu Microelectronics, Inc., MB2146-301A Datasheet - Page 56

• Manufacturer Part Number: MB2146-301A
• Description: 8-bit Microcontrollers
• Manufacturer: Fujitsu Microelectronics, Inc.

56
MB95130MB 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
V
H
H
H
NT
H
H
H
H
AV
: A/D converter digital output value
: Voltage at which digital output transits from (N-1)
SS
V
OT
0.5 LSB
AV
Ideal I/O characteristics
CC
1024
Analog input
− AV
1 LSB
SS
V
FST
(V)
1.5 LSB
AV
digital output N
CC
Total error of
3FF
3FE
3FD
004
003
002
001
H
H
H
H
H
H
H
AV
{1 LSB
SS
H
Actual conversion
characteristic
=
to N
V
×
NT
(N
10
H
− {1 LSB × (N − 1) + 0.5 LSB}
.
= 1024.
− 1) +
Ideal characteristics
Analog input
Total error
0.5 LSB}
1 LSB
Actual conversion
characteristic
V
NT
AV
(Continued)
CC
[LSB]