LMH6714               400MHz, 300 Ohms, None Look at the LMH6714 datasheet for the graph, Frequency Response vs Rf or graph, Non-Inverting Small Signal Frequency Response.               Current Feedback Amplifier is also characterized by its Loop Gain. However, in the case of the Current Feedback Amplifier, this is the difference between Op Amp's Transimpedance Gain (dBOhm) and the feedback resistor's value (dBOhm). See OA-20 Application Note.