Aswin,
I have modified the project I provided earlier to more closely match the new requirements:
"The maximum current that needs to be sourced is mA at most. If it is a problem, then maybe 100uA.
as per requirement, each pulse is 50mV height, 25ms wide, applied in 5mV increment, with voltage resolution as -1 to +1V."
I added an ADC and compute an average Isense current for the circuit.
Attached is the modified project. I have not tested the project with the external resistors and connections. It does compile.
Len
"Engineering is an Art. The Art of Compromise."
