lianghuamo
Newbie level 6
Do the LNA need the ESD?
If not, it is easy to failure: if yes, the NF will degenerate .
If not, it is easy to failure: if yes, the NF will degenerate .
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dsjomo said:A popular solution is using a on-chip spiral shunting to ground node.
sergio mariotti said:I think the best way to answer is...look to the best LNA factory, namely: Miteq.
Looking inside a Miteq LNA, you'll find ESD protection, usually not on RF input but on the DC lines.
As you certainly know, the electrostatic discharge, that is a fast phenomena, has a spectrum that decrease as the frequency rise (Fourier response of a pulse).
So, most of the ESD energy fall into the lower frequency, and the experience has frequentely shown that the DC line is the critical "gate" for ESD, rather than RF ports.
Protect the DC power supply line of your LNA with a series resistor followed by Zeners or series of Schottky diodes.
Yes, many silicon MOS have an integrated ESD protection, but at present the technology of plastic bags used for ship and handling, and generally speaking the technological working areas are well protected. For my experience the risk is mainly related to the energy inducted by lightning. This spike usually get into LNA from DC supply lines.DonJ said:sergio mariotti said:I think the best way to answer is...look to the best LNA factory, namely: Miteq.
Looking inside a Miteq LNA, you'll find ESD protection, usually not on RF input but on the DC lines.
As you certainly know, the electrostatic discharge, that is a fast phenomena, has a spectrum that decrease as the frequency rise (Fourier response of a pulse).
So, most of the ESD energy fall into the lower frequency, and the experience has frequentely shown that the DC line is the critical "gate" for ESD, rather than RF ports.
Protect the DC power supply line of your LNA with a series resistor followed by Zeners or series of Schottky diodes.
We are talking about permanent damage of the pad itself, are we not? I do know that many silicon RF products have ESD. Please comment. Thanks.