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

Poutnoise=Fmixer*Gmixer*Pinnoise, where

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, see http://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:

Pminsignalout=Poutnoise*SNR

The minimum RF input signal level is given by this power and the mixer gain:

Dear Stu,

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

Poutnoise=Fmixer*Gmixer*Pinnoise, where

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, see

http://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:

Pminsignalout=Poutnoise*SNR

The minimum RF input signal level is given by this power and the mixer gain:

Pminsignalin=Pminsignalout/Gmixer=(Fmixer*Gmixer*Pinnoise*SNR)/GMixer=Fmixer*(k*T*B)*SNR

This equation is true only if the input is terminated by a matched resistor at T temperature.

Best regards, vili