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Interactive Design Tools: Utilities : SNR / THD / SINAD calculator
A tool to compute RMS noise and equivalent number of bits (ENOB) from SNR, THD and SINAD data.
Instructions | Troubleshooting
Application Data

VPP V
THD- dB
SNR dB
SINAD
(= SNR + THD)
dB

Instructions

This calculator computes one of SNR, THD or SINAD from the other two as specified by radio buttons located to the left of the quantity name. SINAD equals the RMS sum of THD + SNR. For the computed / entered SINAD, the corresponding RMS noise and the equivalent number of bits are shown in an output field at right.

Please be aware of the accuracy limits of this calculator. THD, SNR and SINAD are all entered as logarithmic quantities and accuracy suffers if the difference between THD and SNR is more than 20dB. For display purposes, results of calculations are rounded to the nearest 4 decimal places which should exceed the precision of most measurements.


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Troubleshooting

For further troubleshooting information, please visit our Interactive Tools troubleshooting page.


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