Other Parts Discussed in Thread: ADC3683, OPA4H014-SEP
I'm planning on using this FDA with a close-loop gain of 0.8889, as shown below. Will it be stable? Will this work?
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provided the inputs are driven by ideal 0R sources and no additonal load impedances are connected to the output(s), your circuit looks good:
But your schematic is incomplete. The load impedance of driver OPAmps can add instability. And please mention, if an additional load is connected to the output(s) of OPAmp.
On the load side, we're driving the AIN+/- pins of an ADC3683. So, just the input impedance of the ADC.
On the drive side, R13 // R57 are driven from an output of the OPA4H014-SEP as shown below.
R11 // R67 are driven through connectors (stacked boards; Samtec FW and FLE) from an Analog Devices AD8028. We provisioned a 0-ohm in serie with the output to be able to damp if needed (R1, as shown below).
Thanks for helping!