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.

Maximum level (dBm)

Required number input.

Noise floor (dBm)

Required number input.

Compute the dynamic range in decibels as the maximum signal level minus the noise floor, 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]

Dynamic range (dB)

The resulting dynamic range returned as a number.

• Compact electronics formulas omit some combination of tolerances, temperature drift, bandwidth, loading, parasitics, noise spectrum, nonlinearity, clipping, calibration, layout, and device-specific limits. Typical datasheet values are not guaranteed limits.
• 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.

• SFDR dB

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

• C/N Ratio dB

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

• 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.