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Article #2054Re: Choosing voltage opamp
From: Jamie
Date: Sat, 23 Sep 2006 20:57
Date: Sat, 23 Sep 2006 20:57
33 lines
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2324 bytes
Vitaliy wrote: > Hello, > > I'm looking to add the 2nd stage to photodiode transimpedance > amplifier. All I want to achieve by 2nd stage is voltage gain and > capability to drive 50 Ohm loads. The first stage is OPA657. > > 1) a) Given power supply for opamp +-5V, should I select the opamp that > has Io,max=>200mA. I do expect Vpeak-to-peak,output to be 10V. > b) Is that output current achievable only at maximum supply voltage, > or as long as > > 2) I need to get an opamp with maximum input impedance (well, anything > >>=1MOhm will do it). Should I get the one with JFET-input? Or any voltage amplifier will do the job? > > > 3) What is Iq per channel(Max)(mA)? > > 4) Would SOIC packaging be better in general? Given that pcb layout is > optimized. > > Thanks in advance, > Vitaliy > google for "High current Op-amp" there are lots of them out there.. -- Real Programmers Do things like this. http://webpages.charter.net/jamie_5
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