In this spec sheet:
I see on page 5 a Gain-Bandwidth Product spec of 230 MHz.. There is a test condition for this of G>+10V/V. I interpret this to mean the gain bandwidth product is measured at a frequency where the open loop gain is greater than 10.
Just above this I see in the Small-Signal Bandwidth of 500MHz that is measured under the test condition G = +1 V/V. I interpret this to mean a 500MHz bandwidth with feedback configured to be unity gain (a voltage follower with output connected to the inverting input). But this 500MHz is more than double the Gain-Bandwidth Product. How can this Small-Signal Bandwidth exceed the Gain-Bandwidth Product? The op amp model I am familiar with is that the highest bandwidth possible is the Gain Bandwidth Product divided by the closed loop gain.