Dear sirI experiment a different behavior regarding input bias current in AD8675 amplifier according models I use with LTSPICE.When I simulate the AD8675 component using the model provided with LT SPICE XVll software, I get perfect match with datasheet…
I use a AD8675 in a circuit just before a DAC. It buffers a voltage reference signal of 5V.
Recently the op amp did not work after a start up. +-15V was applied as supply voltages.
I wonder if start up sequence not was not correct. Maybe 5V on…
Yes, you can use single supply of 12V.However, your input will be atleast +2.5V as the input voltage range required ~2.5V from your -Vs.
Thanks and regards!
I'm tempted to use AD8675/AD8676 but I have a couple of open questions:
In the parametric search, the input voltage headroom for AD8675/AD8676 is given as 1.5V (typ) and 2.5V (max).
Under what conditions do I have to consider the max specification…
I am currently simulating with the AD8675.
If I use it with common feedback stuff. It works.
But the output can reach kilovolts with a supply of +/- 15V
On the other hand, on a particular setup, I do get some other strange behavior…
If build a circuit with some filter capacitors (10uF) an the input's of the OpAmp AD8676 and have the problem that after some time (days of power up/down) suddenly the OpAmp start to leak at it's positive input an sink about…