Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Fundamental (V)

Required number input.

Distortion power (V²)

Required number input.

Noise power (V²)

Required number input.

Compute SINAD in decibels as 20 x log10(Vfundamental / sqrt(noise^2 + distortion^2)); there must be some noise or distortion. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

SINAD (dB)

The resulting sinad returned as a number.

• SNR, SINAD, THD, SFDR, and integrated-noise results require explicit bandwidth, weighting, reference amplitude, windowing, harmonic set, impedance, and RMS or peak conventions. Values measured under different conditions are not directly comparable.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• MDS Calculator

  Compute the minimum detectable signal as MDS(dBm) = -174 + 10 x log10(BW(Hz)) + NF(dB) + SNR(dB); bandwidth must be positive and the noise figure non-negative.

• PSRR dB

  Compute the power supply rejection ratio in decibels as 20 x log10(delta Vsupply / delta Vout); both deltas must be positive.

• A-Weighted SNR dB

  Compute A-weighted signal-to-noise ratio snrADb = 20 * log10(signalVrms / noiseFloorVrms) + aWeightCorrectionDb, with the correction defaulting to zero.