[sdiy] New OTA

[Nils Pipenbrinck]

Ian Fritz wrote:

> Wide-Bandwidth Operational Transconductance Amplifier and Buffer: The 
> OPA860 is a wideband (>400-MHz) op amp with >1200-MHz closed-loop 
> buffer bandwidth.
>
> Anyone had a chance to look into this?


I had a look at the predecessor, and I'm not really excited about it. My 
concerns are:

 * unspecified linearity (and juding from the charts in the datasheet I 
can guess why they haven't specified it).
 * no differential input.
 * expensive, don't know what the OPA860 will cost, but the OPA660 was 
anything but cheap.

OTOH it's a lot faster than the good old CA3080, but if you don't really 
need the speed it's imho a waste of money.