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What is the significance of SRF and ESR ,while selecting SMT capacitor.

Question asked by btv_murthy@rediffmail.com on Aug 23, 2013
Latest reply on Aug 25, 2013 by volker_muehlhaus
Dear Sir,
              I want to select the 82 PF  SMT capacitor at 2GHz of creating the layout of LNA.When I downloaded the AVX company market available 82 PF SMT capacitor 
 
(1) I have noticed the series resonant frequency (SRF) vs capacitor and ESR vs frequency. I am confused, how I have to select the series ( Example 0402,0805,0603,1210) for my 82 PF at 2GHz and ESR. What is this SRF and ESR graphs, is the significance, while selecting the particular  value capacitor. For 82 PF , which series capacitor I need to select. On what basis we have to select the series for particular value capacitor.

(2) How we have to read the capacitor value  at  particular frequency. Similarly how I have to read the ESR value.
                      Anybody knows, please can you explain me in detail.

Edited by: btv_murthy@rediffmail.com on Aug 23, 2013 11:54 PM  

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