Hi,
I am using an OPA209 to build a 2.5V voltage reference. I use two 10kohm resistors to divide the 5V supply voltage and send it to the non-inverting input of an OPA209. The inverting input is shorted to the output. But at the output, I got 1MHz oscillation and the amplitude is about 50mV. When I changed the chip to a LM7301, the oscillation was gone.
Thanks to any help.
Bo.