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ADC Resolution (LSB)

LSB from range and bit count.

Inputs

Channel and requirement

Electrical span of the input channel, e.g. 10 V or 20 mA.

Converter bits: 12, 16, or 24.

Process span on this channel, e.g. 100 kPa.

Smallest process change you must resolve, same unit as span.

Result

LSB (engineering)
0.0244
Resolves tolerance (1=yes)
1
Calculation details
Codes
4,096
LSB (electrical)
0.00244
Resolution (%FS)
0.0244

Verify

Check before relying.

LSB must beat tolerance.

  • Bits from the module datasheet
  • Tolerance from the loop requirement
  • Noise below half an LSB
This calculator is a first-pass screening tool. Verify nameplate data, wiring, module configuration, and calibrator readings before acting.

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Workspace

Keep the assumptions with the result.

Save this calculation to return to the inputs, result, and report from your private workspace.

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