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Hi Team,
First of all thank you very much for showing interest on our query.
We are designing an analog front-end circuit including AD8021 (Opamp) and AD7760 (24-bit ADC). AD7760 ADC has a inbuilt differential opamp (we have replaced it by ab AD8137 differential opamp for simulation). The schematics of our final design is added for your reference.
The gain will be set using the "U5" AD8021 opamp based on the final input signal. The gain will vary from 0.25 to 2.5 using the resistor configuration manually inorder to support +/-1V and +/-10V inputs. Kindly let us know whether the below circuit will work fine for our application.
The simulated circuit and results from LTCSpice are attached for your reference.
Attached files
[edited by: ak3 at 7:24 AM (GMT -4) on 29 Aug 2022]