Article View: sci.electronics
Article #9375Re: line level and op amps
From: Dave Pascoe KM3T
Date: Wed, 09 Jan 1991 04:03
Date: Wed, 09 Jan 1991 04:03
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In article <1991Jan8.072135.15225@wam.umd.edu>, elwood@wam.umd.edu (Jim Bogard) writes:
> Ok, a pair of questions:
other stuff deleted
>
> 2. What's the lowest noise op amp?
> (Don't read too much into this; nothing esoteric, just whatis
> the quietest general purpose op amp. eg, 741,386, etc.)
For audio work one of the quietest op-amps I've seen is the LT1115 manufactured
by Linear Technology (Milpitas, CA). The LT1115 has a voltage noise on the
order of 1.2nV/root Hz at 1kHz (0.9nV typical). Here are some other specs:
Gain-Bandwidth Product: 40MHz Min.
Slew Rate: 10V/us Min.
Voltage Gain: 2 Million Min.
.002% Total Harmonic Distortion @ 10kHz, Av=-10, R(load)=600 ohms Vo=7Vrms
.0002% Intermodulation Distortion (IMD), CCIF Method, Av=+10, R(load)=600 ohms
Vo=7Vrms
It's a great amp for high quality audio work , like for preamps and any other
type of low noise application (frequency synthesizer).
--
Dave Pascoe | Internet: km3t@jjmhome.m2c.org
KM3T/ZF2PT | UUCP: km3t@jjmhome.UUCP or ...!{harvard}!m2c!jjmhome!km3t
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!sdd.hp.com!samsung!crackers!jjmhome!km3t From: km3t@jjmhome.UUCP (Dave Pascoe KM3T) Newsgroups: sci.electronics Subject: Re: line level and op amps Summary: Linear Technology Keywords: op amp, line level Message-ID: <9431@jjmhome.UUCP> Date: 9 Jan 91 04:03:07 GMT References: <1991Jan8.072135.15225@wam.umd.edu> Distribution: usa Lines: 26