Good morning,
In a project I am using several AD8341 chips (9-16) and I am driving I/Q baseband controls single-ended.
I was wondering if, instead of using the voltage divider solution used on the evaluation board (fig. above), I could replace it with a single voltage reference using a REF19x, a suitable voltage divider, and an op amp such as OPA333 (here I'm using a REF192 and a 1:5 voltage divider, fig. below).
This design would in theory save me space on the PCB and avoid proliferation of trimmers to calibrate.
The actual signal ended IQ baseband signals would be provided by a separate DAC with 2 outputs.
My main concern would be how much current each of those baseband controls would draw from the op amp, I would have at the minimum 9x2 = 18 of those chips attached to the same reference. But there may be other issues I do not currently see.
Thank you in advance!
