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.

Resolution (bits)

Required integer input.

Estimate ideal full-scale sine-wave signal-to-quantization-noise ratio as 6.02N+1.76 dB. Oversampling, thermal noise, distortion, and reduced input amplitude are not included. 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]

SNR dB

The resulting snr db returned as a number.

• ADC relationships often assume an ideal full-scale sine wave, uniform quantization, coherent sampling, and independently specified noise or jitter. Real ENOB, SNR, THD, SFDR, aperture uncertainty, reference noise, clock phase noise, input bandwidth, and coding conventions depend on the test setup and datasheet definition.
• 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.

• ADC LSB Voltage

  Calculate one ideal ADC code width as full-scale input span divided by 2^N. Full-scale span is the high-to-low range, not necessarily the reference voltage for every ADC topology.

• ADC Quantization Error Bound

  Calculate the ideal rounding quantizer's maximum absolute error as half an ADC LSB. Assumes a uniform quantizer and input within the conversion range; offset, gain, and noise errors are excluded.

• Quantization SNR

  Calculate the theoretical signal-to-noise ratio limit of an ideal quantizer in decibels.