What is the MINIMUM RF Input level for the ADL5380?
It is a mixer, so no wonder minimum RF input power is not given by the data sheet.Generally the minimum level is defined by the noise power and the signal to noise ratio you need. The noise power at the output is given by
Fmixer=noise figure of the mixer, 14-15dB, see page 11 Gmixer=mixer gain, 6-6.5dB, see page 11 Pinnoise=noise power at the input =k*T*B when the input is terminated. If the input of the mixer is driven by an amplifier, the calculation is complicated, seehttp://en.wikipedia.org/wiki/Noise_figure
So, you can calculate the noise power at the output. If you need SNR signal to noise ratio in your application, you can calculate the minimum signal level at the output:
The minimum RF input signal level is given by this power and the mixer gain:
This equation is true only if the input is terminated by a matched resistor at T temperature.
Best regards, vili
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