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You are right in that the gain at 80 MHz is clearly not 100. Both the initial marketing points and the graph seem to agree on a gain⋅bandwidth of 45 MHz. There does appear to be a slight kink in ...
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#1: Initial revision
by
Olin Lathrop
·
2024-10-28T18:45:16Z (24 days ago)
You are right in that the gain at 80 MHz is clearly not 100. Both the initial marketing points and the graph seem to agree on a gain⋅bandwidth of 45 MHz. There does appear to be a slight kink in the gain curve at 800 kHz, but it looks like the gain is a bit below 100 there. A gain of 100 at 800 kHz seems excessive given unity gain at 45 MHz. Maybe they are trying to say the gain falls off faster than 1/f above 800 kHz. I would certainly ask for clarification from TI before relying on any of these parameters. Or, use a different amp with specs that don't contradict themselves.