Can the AD8348 baseband outputs, with 2K minimum load impedance specified, directly drive the high impedance I and Q inputs of the AD8345?
The AD8345 I and Q inputs are high impedance so the AD8348 outputs will have no problem driving them. There is one issue however. The output bias level of the AD8348 is 1 V while the AD8345 is expecting a bias level of 0.7V. So some level shifting will be necessary. This can be done with resistor dividers or with differential op-amps that have programmable output bias
Thanks, this seemed to be the case, it is useful to confirm the correct connections required.
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