参数资料
型号: MB90349EPF
厂商: FUJITSU COMPONENT LTD
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件页数: 66/85页
文件大小: 1173K
代理商: MB90349EPF
MB90340E Series
69
6.
Definition of A/D Converter Terms
(Continued)
Resolution
: Analog variation that is recognized by the A/D converter.
Non linearity
error
: The deviation between the actual conversion characteristics and a line that joins the
zero-transition line ( “00 0000 0000”
← → “00 0000 0001” ) to the full-scale transition line
( “11 1111 1110”
← → “11 1111 1111” ) .
Differential
linearity error
: Deviation of input voltage, which is required for changing output code by 1 LSB, from an
ideal value.
Total error
: Difference between the actual value and the ideal value. The total error includes zero
transition error, full-scale transition error, and linear error.
3FFH
3FEH
3FDH
004H
003H
002H
001H
AVRL
AVRH
VNT
1.5 LSB
0.5 LSB
{1 LSB
× (N 1) + 0.5 LSB}
Actual conversion
characteristics
(Actually-measured value)
Actual conversion
characteristics
Ideal characteristics
Digital
output
Analog input
Total error
Total error of digital output “N”
=
VNT
{1 LSB × (N 1) + 0.5 LSB}
1 LSB
[LSB]
1 LSB (Ideal value)
=
AVRH
AVRL
1024
[V]
VOT (Ideal value)
= AVRL + 0.5 LSB [V]
VFST (Ideal value)
= AVRH 1.5 LSB [V]
VNT : A voltage at which the digital output transitions from (N
1) to N.
N : Value of the digital output from the A/D converter
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