I'm looking for a low noise opamp that can operate with a negative supply rail of 0 and a positive supply rail of 20V. The AD797 specifies absolute maximum limits of +/- 18V. Will I be safe to use the AD797 with my 20V range as described?
Depending on your filter requirements, you can also try the latest ADA4625-1 18MHz GBP, which is perfect for PLL applications. For your +20V (pos supply) and 0V (neg supply), ADA4625-1 will have IVR of +16.5 to 0V.