[sdiy] TI OTA

Jim Patchell patchell at cox.net
Fri Dec 14 07:21:45 CET 2012


Nothing I know of...I got mine about a year ago...

On 12/13/2012 5:47 PM, Paul Schreiber wrote:
> What's wrong with NE5517?
>
> http://www.mouser.com/ProductDetail/ON-Semiconductor/NE5517ANG/?qs=sGAEpiMZZ
> MtDSiRz%252bYolvOATUkguJs3LBCy2gq8POgo%3d
>
> Paul S.
>
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Tom Arnold
> Sent: Thursday, December 13, 2012 7:31 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] TI OTA
>
> On Fri, Dec 14, 2012 at 12:32:23AM +0100, Magnus Danielson wrote:
>> Hi!
>>
>> Anyone got experience with the OPA861 OTA?
>> Spice simulation model good?
> Some digging in the archives found:
> ----start----
> Date: Tue, 26 Jul 2005 16:05:01 +0200
> From: Nils Pipenbrinck <np at inverse-entertainment.de>
> Subject: Re: [sdiy] New OTA
>
> 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.
> ----end----
>
> --
>   -----------------------------------------------------------------
>   - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org
>   - SynthGeek        -  "...is it a virus, a drug, or a religion?"
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>   --------------------         -- Neal Stephenson,  Snow Crash
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