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.

Average current (A)

Required number input.

Bandwidth (Hz)

Required number input.

Load resistance (Ω)

Required number input.

Compute rms shot noise voltage across a load in microvolts as sqrt(2 x q x I x B) x R with q = 1.602176634e-19 C. 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]

Shot noise voltage (µV)

The resulting shot noise voltage 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.

• Shot Noise Current

  Compute rms shot noise current as sqrt(2 x q x I x B) with elementary charge q = 1.602176634e-19 C.

• Integrated Noise µVrms

  Compute total integrated noise as density x sqrt(bandwidth), expressed in microvolts rms.

• ADC Total Harmonic Distortion

  Calculate THD from RMS harmonic amplitudes relative to the fundamental: sqrt(sum of harmonic squares)/fundamental. Output is percent and dBc; include only the harmonics specified by the measurement method, excluding noise and DC.