Other Parts Discussed in Thread: LMV358, TLV272, LM358, LMP7702, TLV9102, OPA2990
Hi, i have an existing design that uses a TL082 as a volttage follower with high input impedance voltage divider in the range of 10m ohms and 1m ohm. The op amp is supplied with +5vdc/-5vdc, decoupled of course. Voltage is sent to a ADC (pic processor)
Usage is to read a battery voltage in a complex system.
it worked perfect for many years but now it needs to be upgraded for improved performance.
The only problem is the inability of the TL082 to not go rail to rail output.
i went over several test with other op-amps i have on hands and i dont have very good results. Main problem with thoses "better" op-amps that goes RR is in/out difference in the range of 1mv to 20mv which is not acceptable. The TL082 gives me expected precision but no rail to rail.
So my question is, what op-amp would be an immediate upgrade/replacement of the TL082 to achieve rail to rail output ?
how about a TLV272 ? I tested the LMV358 which seemed a good candidate but it was not at all.
thanks for any help.
Regards, Pat Allen