[sdiy] SOIC LT101 equivalent / dilemma

[Justin Owen]

Pulled the MC33078DG off the list because it ended up looking more like an a possible alternative to the TL072 rather than an upgrade.

Currently looking at the TLE2142ID and possibly the OPA2209AIDR as a mid-point between the TL072 and the high-end OPA2227.

Definitely still interested if anyone has anything to add on these - at the moment it does seem a bit like comparing a box of apples and oranges all labelled as 'fruit'.

Ta!

- J 



-----Original Message-----
From: Justin Owen [juzowen at gmail.com]
Received: 30.07.2015 14:17:18
To: SDIY List
Subject: Re: [sdiy] SOIC LT101 equivalent / dilemma

Thanks all...

Has anyone got any experience with any of the MC3307x variants? 

http://uk.farnell.com/on-semiconductor/mc33078dg/op-amp-dual-audio-33078-soic8/dp/9665323

Data sheet spec vs. price - thought it *might* be a good midway option between the TL074 and the obviously very good but much pricier OPA22x options... but that's obviously pretty speculative at this stage!

Thanks - appreciated.

- Justin



-----Original Message-----
From: Ian Fritz [ijfritz at comcast.net]
Received: 29.07.2015 19:40:44
To: Justin Owen; SDIY List
Subject: Re: [sdiy] SOIC LT101 equivalent / dilemma

The OPA2134 would be a big step up, but nowadays I use OPA2227.  The 
quad version of the OPA2227 is OPA4227.  Be careful with the 
OPA2277/4277, because it has a pretty slow slew rate.  OK for the 
converter probably, but maybe/maybe not for how you are using the other 
two sections.

Ian


On 7/29/2015 11:48 AM, Justin Owen wrote:
> Hello,
>
> I recently ordered a bunch of SOIC8 LT1013DDG4 from Farnell as a potential 'upgrade' for a circuit that is currently specced (and working adequately)  using TL074s. I assumed the pinout would be the same - but I've now realised it isn't.
>
> (What I would consider...) The standard/traditional pinout (i.e. the same as the TL07x) is apparently only available in LT101 DIP.
>
> So - for the op-amps in an exponential current source and some CV conditioning/limiting/biasing - what are your suggestions for an SOIC dual op-amp with a 'standard' pinout that'll work off a +/-12V supply - that I can test against a TL074 to see if I get any sort of performance boost?
>
> Would the OPA2134 be a potential contender? I know it's billed as an 'audio' amp.
>
> FWIW - I did cull back through the many "which op-amp should I use threads" - that's how I ended up looking at the LT1013!
>
> Thanks :)
>
> - Justin
>
>
>
>
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