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DC bias circuit for the IF port's of the HMC7584 to limit the current to 3mA and adjust by +/-0.2V for LO null?

Question asked by Sammy on Feb 21, 2018
Latest reply on Feb 21, 2018 by Mark_D

We would like to adjust the IF input DC offset for LO null and are not sure what the internal circuit resistance is to GND or Rail. The datasheet recommends +/-0.2V and 3mA max and the ports are 100 ohm differential.

Can we use a DAC to each input with a series resistor? What value do you recommend for the series resistor to limit the current to 3mA? Is there a recommended circuit for this?

Thanks,

BP

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