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Public evidence

electrical.adc.error_budget

Machine-checked verification for calculation version 1.0.0 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest Reproduce MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance · static DC LSB error-budget calculation· Static DC error budget in LSB, volts, and %FS. VERIFIED covers this calculation model, not measured converter performance, not dynamic SNR/jitter, and not datasheet TUE conventions that omit DNL. · Protocol · Schema · Production report

Declared partition coverage
PASS · 6/6 declared partitions (rss, worst_case, zero-error, bit-width-bounds, single-term, invalid-domain)
Versions
Calculation 1.0.0 · CVP protocol 1.0.0-proposed · Evidence 2026-09-09.o2-reproduce
Verification revision
2026-09-09.o2-reproduce · 4/4 property · digest 39673b9b9f33

Verification

Legacy regression suite: 11/11 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (11/11 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

    This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-09-09.o2-reproduce. Calculation version 1.0.0. CVP 1.0.0-proposed. 6/6 golden · 6/6 CVP boundary · 5/5 invalid · 4/4 property · 6/6 metamorphic · 6/6 cross-interface · 1/1 CVP contract. digest 39673b9b9f33. Static DC LSB/V/%FS error-budget vs independent O2 (same V8, ≤2 ULP on err_LSB, LSB_V, err_V, err_pct_FS, codes). Not measured converter accuracy, not datasheet TUE that omits DNL, not O3.

  • Golden (oracle-backed) 6 / 6
  • CVP boundary 6 / 6
  • Invalid input 5 / 5
  • Property 4 / 4
  • Metamorphic 6 / 6
  • Cross-interface 6 / 6
  • CVP contract 1 / 1
  • Interfaces PASS · UI (SSR) / REST / MCP
  • Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 4/4 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only. Probes use local Node handlers (query-result, calc API, MCP executeCalculation), not live production HTTP.
  • Verified scope static DC LSB error-budget calculation
  • Assurance Engineering
  • release artifacts aligned PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS

Fingerprint sha256:7223200bb31f9c768edc3b8bcd4d3b69bd7d0eac85a0c46ddb757502c253dfab

Input schema sha256:10e5d92e79e9a2192a81c1c96a7383d4b4eebb8d7dfdb7daa0d93f348e2e321f · Output schema sha256:bc2424d86172e14ac883bcf4d96c07f9a749d435f507adbf95b431d27c6877dc · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool
adc-error-budget
Engine
adc-error-budget
Engine build
2026-09-10
Evidence core
2026-09-05T02:35:39.217Z
Rendered
2026-09-16T22:03:43.727Z
Last reviewed
2026-09-03

Assumptions

  • Gain, offset, INL, and DNL values are already referred to LSB.
  • RSS assumes contributors can be treated as independent/uncorrelated.
  • FSR_V represents the full ADC input span.
  • CalculatorX includes DNL as a separate RSS/worst-case contributor. Some ADC datasheets define TUE using gain, offset, and INL only.

Limitations

  • Static DC errors only.
  • Quantization ±0.5 LSB is separate unless included in the INL/DNL terms you enter.
  • CalculatorX includes DNL as a separate RSS/worst-case contributor. Some ADC datasheets define TUE using gain, offset, and INL only.

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

IDKindStatusDetail
rss-12bgoldenpassExpected err_LSB=1.5811388300841898 · LSB_V=0.0008056640625 · Actual n_bits=12 · FSR_V=3.3 · codes=4096 · LSB_V=0.0008056640625 · combine=rss · gain_err_LSB=1 · offset_err_LSB=0.5 · inl_LSB=1
wcagoldenpassExpected err_LSB=3 · Actual n_bits=12 · FSR_V=3.3 · codes=4096 · LSB_V=0.0008056640625 · combine=worst_case · gain_err_LSB=1 · offset_err_LSB=0.5 · inl_LSB=1
soft-zero-errsgoldenpassExpected err_LSB=0 · Actual n_bits=10 · FSR_V=5 · codes=1024 · LSB_V=0.0048828125 · combine=rss · gain_err_LSB=0 · offset_err_LSB=0 · inl_LSB=0
bad-bitsboundarypassExpected VALUE_OUT_OF_RANGE · Actual VALUE_OUT_OF_RANGE
bad-bits-fracboundarypassExpected VALUE_MUST_BE_INTEGER · Actual VALUE_MUST_BE_INTEGER
bad-bits-highboundarypassExpected VALUE_OUT_OF_RANGE · Actual VALUE_OUT_OF_RANGE
bad-combineboundarypassExpected INVALID_MODE · Actual INVALID_MODE
boundary-adcboundarypassExpected err_LSB=1 · Actual n_bits=12 · FSR_V=3.3 · codes=4096 · LSB_V=0.0008056640625 · combine=rss · gain_err_LSB=1 · offset_err_LSB=0 · inl_LSB=0
boundary-adc-badboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
property-adcpropertypass1
property-adc-integer-bitspropertypassn_bits contract