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I want to amplify a 48KHz sinusodial signal with a gain factor of 3 - 4, OP07 does not allow this. Iam using +/- 15V and input signal is @8Vp-p, output expected is 30Vp-p. But practically op07 does not support this than i used LF156 but the o/p does not go above 18Vp-p. After analysing i feel that the unity gain bandwidth for these opamps is very low. 
 My question is can someone suggest the appriopriate opamp for this application. I am designing a capacitance impedence converter circuit. 
 Regards, 
 Ajay Dudhe

ADIApproved · Accepted Answer

Ajay, 
 Here are a few items to step through to help get this to work. 
 
 Op amp needs a GBP minimum of 4 X 48 kHz = 200 kHz. But at this point signal will be about -3dB. For better performance need 10X this BW so you need >=2 MHz. 
 Second issue is that most parts including those you've tried don’t support R-R output. So, choose one that does and you will come much closer to the +/-15V out. For a quick solution you can try the ADA4084. Depending on load you may not get all the way to 30V p-p but you'll be much closer. 
 To choose a part more applicable to your needs see ADI’s selection table and sort for Vsupply >=30V, R-R output, GBP >= 2MHz.)

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