I'm looking at the TLC2272 (or alternatives). What I need is a single supply Op Amp, capable of operating at 5V, and able to Follow a voltage from gnd to +5V.
Looking at the TLC2272 datasheet - it's noted the recommended operating condition is to VDD - 1.5V (so I can only expect an input of 3.5 at the output in voltage follower mode)? I'm looking for it to have a high input impedance (no interference on circuit being monitored).
I think I can see the TLV2371 op amp as doing it - the datasheet shows that the common mode input voltage range is 0 to VDD. I take it to mean that if I power it with a single 5V supply, and place 5V on the input, and got the DMM, I'd expect to read 5V on the output. I think 1000Gohms means 1000 giga ohms of input resistance - so this would mean it would not load the circuit being monitored, therefore ensuring it is as if a DMM was monitoring it..
Am I right with that?