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.

Carrier level (dBm)

Required number input.

Spur level (dBm)

Required number input.

Compute the spurious-free dynamic range in decibels as the carrier level minus the largest spur level, both in dBm. 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]

SFDR (dB)

The resulting sfdr 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.

• Dynamic Range dB

  Compute the dynamic range in decibels as the maximum signal level minus the noise floor, both in dBm.

• ADC Spurious-Free Dynamic Range

  Compute SFDR in dBc as 20log₁₀(fundamental RMS amplitude/largest spur RMS amplitude), excluding DC. Use amplitudes measured in the same unit from one spectrum.

• C/N Ratio dB

  Compute the carrier-to-noise ratio in decibels as the carrier power minus the noise power, both in dBm.