How to Get Best ADC Accuracy for LPC800
●LPC800 serial has a 12-bit successive approximation analog to digital converter. In the application design, the ADC accuracy is the most important factor.
●To evaluate the ADC accuracy, the following static characteristic parameters are used:
■EO - offset error.
▲The offset error (EO) is the absolute difference between the straight line which fits the actual curve and the straight line which fits the ideal curv
■EG - gain error or the full-scale error voltag.
▲The gain error (EG) is the difference between the straight line fitting the actual transfer curve after removing offset error and the straight line which fits the ideal transfer curve
■EL - integral non-linearity.
▲The integral non-linearity (EL) is the peak difference between the center of the steps of the actual and the ideal transfer curve after appropriate adjustment of gain and offset error
■ED - differential linearity error.
▲The differential linearity error (ED) is the difference between the actual step width and the ideal step width.
●In application design, designer should apply methods to reduce above errors to get the best ADC accuracy.
●Other factors also will affect ADC accuracy in application, such as:
■Power stability and noise.
■Reference voltage stability.
■Digital and analog part isolation in system.
■ADC input impedance matching with outside circuit impedance.
■PCB layout with EMI and EMC problems.
|
|
|
|
|
|
|
Application note & Design Guide |
|
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
|
|
|
|
English Chinese Chinese and English Japanese |
|
|
December 21, 2020 |
|
|
Rev. 0 |
|
|
AN13102 |
|
|
944 KB |
- +1 Like
- Add to Favorites
Recommend
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
