Hi,
I analyze the datasheet for the TDA7315 chip, and have some doubts concerning noise.
First one is "Figure 4: Noise vs. Volume/Gain Settings".
It looks like under the 0dB the noise is below 5uV (typical). At +20dB noise going up to
30uV. 20dB is like 10times amplification, so can we say the input noise of internal op-amps
is like 3-5uV/rtHz. (I would say if we 'model' the whole internal audio line as op-amp).
In the NE5532 datasheet there is a 5nV/rthz 'Equivalent input noise voltage' (1khz). Is it
mean, if this op-amp closed loop with amplification 1, the noise on the output will be 5nV ?
Regards.
I analyze the datasheet for the TDA7315 chip, and have some doubts concerning noise.
First one is "Figure 4: Noise vs. Volume/Gain Settings".
It looks like under the 0dB the noise is below 5uV (typical). At +20dB noise going up to
30uV. 20dB is like 10times amplification, so can we say the input noise of internal op-amps
is like 3-5uV/rtHz. (I would say if we 'model' the whole internal audio line as op-amp).
In the NE5532 datasheet there is a 5nV/rthz 'Equivalent input noise voltage' (1khz). Is it
mean, if this op-amp closed loop with amplification 1, the noise on the output will be 5nV ?
Regards.
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