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Not getting full gain when Cascading VGA AD8367

Question asked by Rambabu-BEL on Jul 31, 2015
Latest reply on Aug 7, 2015 by jdobler

Dear Sir,

When I am cascading stages with at 75MHz

AD8367 + AD8367 +MMIC Amp + BPF + Power Splitter

40 + 40 + 16 -12 -4  = 80dB

Theoretically I am supposed to get 80dB when cascading above stages, but I am getting nearly 60dB only instead of 80dB. When tested individual stages all of them are giving gain/loss as per the above figures. Can any one suggest what to be done to get the full gain.