I  just loaded it down with a 50 ohm load and looks perfect.

One of my design pet peeves is not anticipating what users may do. For example, not anticipating that someone might terminate an output in a high impedance rather than in the rated impedance, or leave unused outputs unterminated. I have seen several multichannel isolation amplifiers where any output not terminated in 50 ohms is in hard clipping -- even with halfway decent isolation, this can put garbage on the other outputs. The very definition of an isolation amplifier is that each output should be independent of how the other outputs are terminated -- short, open, inductor, capacitor, other signal, whatever. I understand it is not trivial to provide 1 Vrms (+13 dBm) outputs with 6 dB overhead from a 5 V (or 3.3 V) supply, but that's why they pay designers the big bucks.


Best regards,

Charles





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