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Old 11th August 2003, 05:02 PM   #1
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Default Good Low-noise op amp?

I want to build some balanced to unbalanced converters for instrumentation. What's a good low-noise / low distortion op amp to use?

Thanks

Mike
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Old 11th August 2003, 05:04 PM   #2
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Good FET-inpt OP-amps are OPA627 and OPA134 from BurrBrown

Good bipolar OP-amps are OP27/37, AD797
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Old 11th August 2003, 05:34 PM   #3
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Default Re: Good Low-noise op amp?

Quote:
Originally posted by mrothacher
I want to build some balanced to unbalanced converters for instrumentation. What's a good low-noise / low distortion op amp to use?
For instrumentation applications -- thermcouple, ultrasound, photodiode, strain bridge -- you really want an instrumentation amplifier from Analog Devices, Linear Tech or Burr Brown (TI), Rather than putting the cart in front of the horse, search by application.

Analog has a 72 page guide to Instrument Amps:
http://www.analog.com/UploadedFiles/...67appguide.pdf

Some of the Burr Brown instrumentation amps show up in good quantity on EBay -- like the INA101, INA103 -- these are pretty expensive if you purchase through a distributor, however.
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Old 11th August 2003, 06:24 PM   #4
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Excellent. Thank you, both.

This will be a signal conditioner for a sound card.
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