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ADC quantization and input range calculator

Ideal unipolar ADC quantization; reference tolerance/noise omitted.

embedded-adc-resolution.napkin / editable
✓ checks pass

SCENARIO COMPARISON

Compare the numbers.

This source describes an analytical model. Its quantities and checks are the view.

ScenariolsbmVquantizationSigmamV
0.8056640.232575
0.6445310.18606

All calculated quantities are listed with the inputs. Switch to Source to inspect the equations.

SCENARIOS / CALCULATED VALUESSAME SOURCE

Change an input to see the consequences.

LSB budget0.81 mV✓ passes

BASELINE INPUTS

CALCULATED

lsb0.80566 mV
quantizationSigma0.23258 mV

Edits change the baseline source.

Calculated from your source · not saved
Baseline · Baseline
LSB budget0.81 mV ✓ passes
alternative · alternative
LSB budget0.64 mV ✓ passes

Illustrative first-order example. Checks are editable requirements, not design standards. The broader topic may require additional equations, data, and validation.

Formula and units

This example uses the following equations. Input names and units match the editable source above.

lsb
lsb = reference/2^bits [mV]
quantization sigma
quantizationSigma = lsb/sqrt(12) [mV]

Original worked example

These are the baseline values in the downloadable source. Edits above let you test your own values.

Given

reference
3.3 V
bits
12

Calculated

lsb
0.805664 mV
quantization sigma
0.232575 mV

Assumptions and limits

Ideal unipolar ADC quantization; reference tolerance/noise omitted.

The requirement checks use the limits written in this example. Passing a check does not establish that the model covers every load, material behavior, or operating condition in a real design.

Download this .napkin example ↓

Take it further with your agent

Napkin keeps the inputs, equations, checks and assumptions together in one study. Your agent sets it up; you change the numbers.

Try with Claude ↗

codex 'Use Napkin (https://napkin.engineering/mcp, or the local Napkin plugin) to build a study: ADC quantization and input range. Inputs: reference; bit depth; gain; input range. Outputs: LSB size; codes; quantization interval. Model scope: Declared clock, peripheral and execution assumptions. Read napkin_capabilities and the current snapshot. Ask me for the values that matter, label assumptions with units, author .napkin source, validate it and apply it with napkin_source using the current revision, then open the study. Add checks for the limits I supply. Keep unsupported analyses explicit.'

Claude needs the Napkin connector; Codex needs the Napkin plugin. Set up your agent ↗

The broader study

The topic brief below describes the broader scope. The worked example above states the particular calculation it implements.

  • Inputs: reference, bit depth, gain, input range
  • Outputs: LSB size, codes, quantization interval
  • Modes: calculate, compare, sweep
  • Drawing: Timing diagram or event simulation

EXECUTABLE WORKED EXAMPLE · FIRST-ORDER MODEL · CHECK THE SCOPE & ASSUMPTIONS

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