Other Parts Discussed in Thread: ADC12D1600
Is the Abs. Max RF power at Vin pins for the ADC12D1600 part found as 20*log(V*I) = 10*log(2.5*.05*1000) = 21dBm?
If not, can you please provide the appropriate equation and or RF Power max?
Thanks
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Is the Abs. Max RF power at Vin pins for the ADC12D1600 part found as 20*log(V*I) = 10*log(2.5*.05*1000) = 21dBm?
If not, can you please provide the appropriate equation and or RF Power max?
Thanks
Hi Mike
For design calculations with respect to input signal overdrive I would recommend using the max value listed in the Operating Ratings table for Vin+, Vin- Power, "Not maintaining common mode voltage". From that table, 17.1 dBm is the maximum signal overdrive you should be targeting, especially if you can't control the percent of total operating time will be spent at that condition.
Given the nominal full-scale input signal power of 800mVpp or approximately -0.969dBm, you have just over 18dB of headroom from the full scale signal level to the maximum allowed over-drive.
If you need the ADC to recovery rapidly from the over-range conditions you should use the "Maintaining common mode voltage" value of 15.3 dBm for planning. This drive level is just low enough to prevent turning on the ESD protection diodes at the analog inputs and will keep the AC-coupled inputs at the proper common mode voltage.
Best regards,
Jim B
Understood.
Thank you.
Any way to determine if it will survive at those power levels, when turned off? do the ESD Diodes protect even if not biased?
Thanks
Mike