Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
It is possible use additional feadback to increase noise immunity, for example in pipeline ADC's MDAC we have feadback in phase of sampling but don't have feadback in phase of multiphlication. If we don't cut feadback in phase of multiphlication can it help me to increase noise immunity.
You can also use averaging and/or digital filtering on the chip in addition to any external analog filtering. Note with digital filtering you will want an external low pass filter with a bandwidth no wider than half your expected highest desired spectral component or you will end up with aliasing in any digital filtering you use.
A low values capacitor (Say 0.01uF) will help the purpose. Moreover, Care should be taken that the cap is as close to the ADC as possible else it will result in formation of a trace loop antenna which will degrade EMC/EMI performance further.
Several times a smd choke (10uH, 0805) on the ADC trace improves the results dramatically.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
