> Great suggestion! TI has eval boards available for them so I can > get up to speed quickly. I guess the idea is that I set it > up for a gain of 2, and put a 50 ohm resistor in series with the > output. Now it is a unity gain buffer in a 50 ohm system. A > signal trying to go through it backwards has a source impedance > of 100 ohms driving the output impedance of the amplifier, which > is spec'ed at 30 milliohms, at least at low frequencies. That > works out to 70 dB, which is what you observed. So > I can see how it could have good reverse isolation.
Exactly, for unity gain you'd design for +6 dB and series-terminate the output with 50R. Good for capacitive loads as well as isolation. > Do you run it in inverting or non-inverting configuration? I've only used the non-inverting configuration (figure 1 from the datasheet). Takes about 20 minutes to dead-bug with 0603 resistors over bare copper. -- john, KE5FX Miles Design LLC _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
