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John W. suggested an AD797 as a standard of comparison for voltage
noise, which is fine, but for lowest noise figure, you need to know the source impedance that will be driving the circuit, and you need to be careful about part values in the rest of the circuit as well. Suggest you have a look at some other amps...there are so many good ones available these days. Since you mentioned two quad op amps, I assume you want to use a quad, and not singles like the AD797. TLC074 might be a better choice than either of your suggestions. There are other factors you may not have considered. The TLC274 has very limited slew rate for audio applications, and can only put out a bit over a volt p-p at 3kHz, for example. Is distortion an issue? If so, you at least should pick an amp with adequate slew rate. If you'd like to optimize the choice of amplifier a bit better, and can pick from a wider range than just the two you mentioned, perhaps you could tell us more about the application and what other constraints there may be. Cheers, Tom |
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