TLE2426 -- noisy?

[jackinnj]

TLE2426 specs put noise at 120uV 10Hz to 10kHz, (30uV with the noise reduction option). Is the device too noisy to be used to inject positive bias into the non-inverting input of a single supply opamp circuit?

 

[Mark Tillotson]

120µV with 10kHz bandwidth is 1200nV/rtHz, with 1/2 an NE5532 and a decoupled resistive divider you'll get 5nV/rtHz - 240 times better (nearly 50dB quieter)


In practice a lot of the noise of the TLE may will be flicker noise in the lower frequencies, but even so its ruled out for audio I think.