What's your favorite rail-rail op amp?

Question

Clearly I'm designing a circuit. I'm kind of in Rip-van-winkle land as far as current parts, since I've been doing software and algorithms for the last few years. So I'm current on lots of nifty through-hole parts, but choosing nice stuff out of the oceans of newer parts could drag me down considerably.

What's your favorite rail-rail op amp? It doesn't have to have spectacular performance -- It's basically for a unity-gain follower on a signal that's been AC coupled then run through a 5kHz lowpass filter anyway.

It may well have input voltages that exceed the power supply rails, so something that's vice-free in that regard would be nice. Beyond that, it doesn't have to be a terribly hot performer.

Rich Webb · Accepted Answer

National's LM6132/6134 is nice and reasonably well-behaved as long asyou're not beyond the rails by more than a few hundred mV.-- Rich Webb     Norfolk, VA

John Larkin · Answer

I use a lot of LM7301s, when I have high (like +-12) supply rails, butit is a bit expensive. I really ought to find a cheaper low-voltageRRIO opamp for those cases where the rails are lower.John

Phil Hobbs · Answer

National makes a bunch of op amps that would be really nice if they weren't 10-20 dB noisier than the competition.  Bizarre.CheersPhil Hobbs-- Dr Philip C D HobbsPrincipalElectroOptical Innovations55 Orchard RdBriarcliff Manor NY 10510845-480-2058email: hobbs (atsign) electrooptical (period) net

krw · Answer

The AD8606 is our general purpose R-R op-amp.

Hammy · Answer

Tim Wescott  wrote innews: OPA2365 OPA2376AIDR higher CMRR BUT higher Offset and drift then the OPA2365If your looking for DC precsion then youd be hard pressed to beat the AD8629 They aint giving it away though its a chopper.The OPA2727 isnt RRI  but it is RR out its pretty cheap good upto 12V

Hammy · Answer

""  wrote innews: That one is pretty good for $1.46 for 250+. I dont know how I missed it might be a replacem,ent for my OPA2376.

krw · Answer

We also use the AD8566 in higher voltage applications and the National LMV832where RF hardening is needed.

John Devereux · Answer

I like AD8655. Don't know about it's behaviour when overdriven though.-- John Devereux

George Herold · Answer

,ay.I like the LT1013/1014, though it's more a single supply opamp.  Pisspoor slow at 0.4 V/us.  But a low Vos, which you may not care about,being AC coupled and all.George H.

What's your favorite rail-rail op amp?

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