gerrysweeney
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Hi,
I am wondering if anyone can recommend a precision dual op-amp with very low input offset current and voltage that does not cost too much. I have tried using an LT1013 which is pretty good but the grade with <150uV in a SOIC8 package is expensive from farnell.co.uk at nearly £4.50 each. I am looking for alternatives, I found OPA2277U which is about half the price but was wondering what else was out there. The problem I have is when I am using a gain of 10, I am also amplifying the offset which is then difficult to correct. I ideally need an offset of less than 1mV at a gain of 10. I am using this in my PSU project https://gerrysweeney.com/fully-programmable-modular-bench-power-supply/ as a point of reference, if anyone has any suggestions I would be grateful to receive them.
Thanks,
Gerry
I am wondering if anyone can recommend a precision dual op-amp with very low input offset current and voltage that does not cost too much. I have tried using an LT1013 which is pretty good but the grade with <150uV in a SOIC8 package is expensive from farnell.co.uk at nearly £4.50 each. I am looking for alternatives, I found OPA2277U which is about half the price but was wondering what else was out there. The problem I have is when I am using a gain of 10, I am also amplifying the offset which is then difficult to correct. I ideally need an offset of less than 1mV at a gain of 10. I am using this in my PSU project https://gerrysweeney.com/fully-programmable-modular-bench-power-supply/ as a point of reference, if anyone has any suggestions I would be grateful to receive them.
Thanks,
Gerry
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