25-11-2016, 09:33 PM
(This post was last modified: 25-11-2016, 09:36 PM by Mike Watterson.)
https://www.maximintegrated.com/en/app-notes/index.mvp/id/1931
Low noise 3.3V op-amp. Easily powered off recitfied 4V
Probably far better, but needs a dual rail PSU.
The LT1115 is the lowest noise audio operational ampli-
fier available. This ultralow noise performance (0.9nV/√Hz
at 1kHz) is combined with high slew rates (>15V/μs) and
very low distortion specifications.
Voltage Noise: 1.2nV/√Hz Max at 1kHz
0.9nV/√Hz Typ at 1kHz
Voltage and Current Noise 100% Tested
Gain-Bandwidth Product: 40MHz Min
Slew Rate: 10V/μs Min
Voltage Gain: 2 Million Min
Low THD at 10kHz, A V = –10, R L = 600Ω: 0.002%
V O = 7V RMS
Low IMD, CCIF Method, A V = +10: 0.002%
R L = 600Ω
V O = 7V RMS
The RIAA circuit shown below using the LT1115 has very
low distortion and little deviation from ideal RIAA
response (see graph).
http://www.linear.com/docs/1612
Low noise 3.3V op-amp. Easily powered off recitfied 4V
Probably far better, but needs a dual rail PSU.
The LT1115 is the lowest noise audio operational ampli-
fier available. This ultralow noise performance (0.9nV/√Hz
at 1kHz) is combined with high slew rates (>15V/μs) and
very low distortion specifications.
Voltage Noise: 1.2nV/√Hz Max at 1kHz
0.9nV/√Hz Typ at 1kHz
Voltage and Current Noise 100% Tested
Gain-Bandwidth Product: 40MHz Min
Slew Rate: 10V/μs Min
Voltage Gain: 2 Million Min
Low THD at 10kHz, A V = –10, R L = 600Ω: 0.002%
V O = 7V RMS
Low IMD, CCIF Method, A V = +10: 0.002%
R L = 600Ω
V O = 7V RMS
The RIAA circuit shown below using the LT1115 has very
low distortion and little deviation from ideal RIAA
response (see graph).
http://www.linear.com/docs/1612
