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Public evidence

electrical.adc.error_budget

Machine-checked verification for calculation version 1.0.0 · tier internally_reviewed

CVP status

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.

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 2026-10-28.meta-metrics-v2
Verification revision
2026-10-28.meta-metrics-v2 · 4/4 property · digest 2a02032d97a8

Verification

Legacy regression suite: 11/11 calculation tests · Production surface contract 6/6

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 2026-10-28.meta-metrics-v2. Calculation version 1.0.0. CVP 1.0.0-proposed. 6/6 golden · 5/5 CVP boundary · 5/5 invalid · 4/4 property · 6/6 metamorphic · 6/6 cross-interface · 6/6 CVP contract. digest 2a02032d97a8. 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 5 / 5
  • Invalid input 5 / 5
  • Property 4 / 4
  • Metamorphic 6 / 6
  • Cross-interface 6 / 6
  • CVP contract 6 / 6
  • 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 output required declared PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS
  • rest success payload validates schema 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
2026-11-10T05:18:41.755Z
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.

Verification disclosure

Aggregate outcomes, scope and artifact commitments are public. Complete test inputs, expected values, execution records and oracle infrastructure are retained privately. This summary does not independently reproduce the full verification run.