Category: Datasheet/Specs
Product Number: AD608
Dear All,
The RF input specification is not fullly clear I would like to ask somebody help.
The RF impedance below 100MHz is ~3K Ohms. On datasheet front panel: RFin=-95dB to -15dBm (input stage limiting level) on 50 Ohms and for
linear-in-dB RSSI operation. It suggests if the part is used for RSSI meter 4uVrms is the ultimate limit.
In specification table: Mixer noise figure 11dB for "Matched input" condition. Does it mean an 50Ohm -> 3KOhm impedance
transformer was used, or with another ratio say 50Ohm -> 300 Ohm (I assume from aspect of noise a lower source impedance is the optimal than 3K input resistance)?
Regards,
Jospeh
