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by ErroneousBosh
52 days ago
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LT1812 is my weapon of choice for ultra low RF stuff (think Tayloe mixer frontends). Readily available, pennies to buy, reasonably flat to about 20MHz although THD is getting a little rough up there, possibly because I'm using it wrong. They cost pennies. |
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Looks like they're closer to $3+? Like this is more expensive than a lot of microcontrollers for just one OpAmp.
I wouldn't call any Analog Devices / Linear Technologies parts to be a jellybean. Jellybean means matching common specs that any manufacturer can do.
But at $3 per chip, that's very far away from jellybean status. And AD / LT devices are known for high quality that no one else replicates.
> although THD is getting a little rough up there
Yeah, because a 100MHz high speed OpAmps only has 5x gain at 20MHz. So your error is now well in excess of like 20% (best case) or probably way way worse errors in practice.
As I said earlier: Im not even convinced that 100MHz OpAmps have the GBWP to effectively operate on 20MHz signals. You need more GBWP than that to be comfortable.