參數(shù)資料
型號： MPC5604CF1MMG4
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, PBGA208
封裝： 17 X 17 MM, 1 MM PITCH, PLASTIC, MO-151AAF-1, MAPBGA-208
文件頁數(shù)： 70/104頁
文件大?。?/td> 953K
代理商： MPC5604CF1MMG4
MPC5604B/C Microcontroller Data Sheet, Rev. 9
Electrical characteristics
Freescale Semiconductor
68
4.18
ADC electrical characteristics
4.18.1
Introduction
The device provides a 10-bit Successive Approximation Register (SAR) analog-to-digital converter.
Figure 19. ADC characteristic and error definitions
4.18.2
Input impedance and ADC accuracy
In the following analysis, the input circuit corresponding to the precise channels is considered.
To preserve the accuracy of the A/D converter, it is necessary that analog input pins have low AC impedance. Placing a capacitor
with good high frequency characteristics at the input pin of the device can be effective: the capacitor should be as large as
(2)
(1)
(3)
(4)
(5)
Offset error (EO)
Gain error (EG)
1 LSB (ideal)
1023
1022
1021
1020
1019
1018
5
4
3
2
1
0
7
6
1
2
3
4
5
6
7
1017 1018 1019 1020 1021 1022 1023
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) Differential non-linearity error (DNL)
(4) Integral non-linearity error (INL)
(5) Center of a step of the actual transfer curve
1 LSB ideal = VDD_ADC / 1024
Vin(A) (LSBideal)
code out
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