I'm looking for op amp with shutdown function,and high impedance when in shutdown.
Is the output of the ADA4691-2 this function?
Are all amplifier outputs in a high impedance state, when in shutdown mode?
There is no description in the…
the ADA4691-2 looks nice for your application.
I'm surprised it is doing anything.
-- You need at least 5V across the part to wake it up
-- It is not RR input; you need to stay at least 1.5V away from either rail.
Try an ADA4084-2 or an ADA4528-2
For the LMC662,, you could also look at:
Which op amp? The OP281 rev D, page 3 d.s. says 95 kHz gbw on 3V??
The tool will let you pick other op amps. But if the op amp won't work, it won't let you
pick it. Try the ADA4666-2, ADA4528-2, ADA4528-1, ADA4691-2. All are less than
When we design a part, we do worst case simulations over process variations, temperature, etc.
We also add some margin for tester error. So you have been lucky.
If you choose another AD8666 from a different fab run and test it at -20C or +60C, you…