I get a lower regulated Vout when applying load by a few mV. Does about the same when built. Some other OPAs do not present such a behaviour. One major difference seems to be, they have bigger differential input impedance. Can someone explain me the exact reason?
From the schematic, I have seen that your R1-Q2 will be your load.
Can you share the specific amplifier you have compared with LT1818?For me to further check the difference in their response.
Thanks and regards.
LT6274 though a bit slower, but produces a drop ten times smaller (1mV vs. 88uV).
I have tried to simulate both parts and yes, LT6274 is quite slower.Also, I can see that LT1818 has better regulated Vout as compared to LT6274.
Do you mind if I ask you to share your simulation which you see
b_akos said:produces a drop ten times smaller (1mV vs. 88uV).
Here they are. As I increase the reference voltage the error increases too. At 1V ref the error is 1mv, at 3V ref it becomes 1.65mV. It is not critical for the current project, but I'd like to know the reason behind.