At a glanceresistance range and network configuration, tolerance class, per‑element power, package type, and why verifying the NOMC16031003FT5 matters for system reliability. Pointengineers need these baseline numbers to budget accuracy and thermal headroom. Evidencethe datasheet lists nominal values and ratings. Explanationthis note presents spec breakdown, measured test data, and repeatable verification procedures.
Goalprovide a concise, repeatable validation plan so an engineer can confirm fit‑for‑purpose before PCB sign‑off. Pointthe focus is on reproducible measurements and practical pass/fail thresholds. Evidencecommon failure modes impact system gain and offset. Explanationfollow the test plans and PCB guidance below to reduce field risk and design iterations.
1 — Device overview & part-identification (background)
Part numbering, package and pinout — explain how to interpret the NOMC16031003FT5 part code, list package options, pinout diagram and footprints to check against PCB land pattern. Content directioninclude a simple labeled diagram, recommended footprint checks, and note common misreads when sourcing.
Pointdecode the part code to confirm the correct resistor network variant for the design. Evidencepart codes encode element count, configuration, tolerance and package. Explanationverify package pitch and pinout against PCB footprint; confirm the network type and tolerance before placing orders to avoid mistaking similar codes from different families.
Simple labeled pinout (text diagram)_________
| 1 . . 8 |
| . NOMC |
| 8 . . 1 |
---------
Keypins 1–8 correspond to element termini; check datasheet pin map and recommended land pattern.
Key electrical features at a glance (spec summary) — provide a concise spec table to be filled from the datasheetresistance values per element, network configuration (series/parallel/common node), tolerance, TCR (ppm/°C), max working voltage, element power rating, insulation/isolation, and operating temperature range. Content directionadvise authors to annotate each spec with the expected measurement unit and acceptable tolerance.
Pointcapture critical specs in a single table for bench planning. Evidencenominal resistance, tolerance, TCR, power and voltage limits determine measurement methods. Explanationannotate units (Ω, %, ppm/°C, W, V, °C) and acceptable test tolerances when recording results.
SpecValueUnit / Note
Resistance per element3.01k (example)Ω — verify against datasheet
Network config3 resistors, common node— confirm pinmap
Tolerance±0.1%
TCR±25ppm/°C
Power per element0.063W
Max working voltage50V
Operating range-55 to +125°C
2 — Full electrical specification breakdown (data analysis)
Resistance, tolerance and temperature coefficient (TCR) — explain what each spec means for circuit behavior, how tolerance and TCR combine to affect accuracy across temperature, and long-tail keyword suggestions to use in this section (e.g., "NOMC16031003FT5 resistor network spec", "resistor network TCR spec"). Content directionrecommend including formulae for worst-case tolerance stack-up and an example calculation.
Pointtolerance and TCR set initial and temperature‑dependent error budgets. Evidenceworst‑case tolerance stack = tolerance + (ΔT × TCR/10⁶ × 100%). Explanationfor a ±0.1% part with 25 ppm/°C TCR and a 80°C swing, temperature contribution = 0.20% so total worst‑case = 0.30%; use this in system accuracy budgeting.
Power, voltage and isolation constraints — detail per-element power dissipation, derating rules, maximum working/withstand voltages, and isolation between elements. Content directioninclude thermal considerations (ambient vs. PCB thermal resistance) and a small derating table for common operating conditions.
Pointelement power rating must be derated by board thermal environment. Evidencepackage thermal resistance and copper area change allowable dissipation. Explanationapply derating; if 0.063 W rating at 25°C rises with ambient, reduce continuous power by specified percentage per datasheet guidance and monitor temperature rise in thermal simulations.
AmbientDerating factor
25°C100%
60°C70–80%
85°C≤60%
3 — Test datameasured results & typical performance (data analysis)
Test setup and measurement conditions — specify repeatable lab conditionssample size, temperature chamber setpoints, instruments (four‑wire source‑measure, LCR meter, micro‑ohm meter), test-fixture guidelines, measurement cadence, and logging format. Content directioninclude a reproducible test plan checklist (ambient temp, soak time, measurement sequence).
Pointa repeatable setup reduces measurement variability. Evidenceuse four‑wire Kelvin measurement, stable source, and temperature chamber. Explanationrecommended sample N≥30, soak 15 min at temperature, sequenceDC resistance (room), TCR sweep, power soak, isolation test; log CSV fieldsID, temp, measurement, timestamp, operator.
Sample size30 units minimum.
Instruments4‑wire SMU, LCR for AC checks, micro‑ohm for
Chamber setpoints-40, 25, 85°C with 15‑min soak.
Fixturegold‑plated Kelvin contacts, minimized lead length.
LoggingCSV with metadata and pass/fail flags.
Typical measurement results and interpretation — show how to present measured resistance distributions, TCR curves, power-cycle behavior, and isolation/leakage figures (placeholders for actual tables/plots). Content directioninstruct authors to include sample mean, standard deviation, histogram of resistance spread, and pass/fail criteria aligned to the datasheet spec.
Pointpresent statistics, not just individual values. Evidenceinclude mean, σ, min/max and histogram. Explanationdefine pass if |measured − nominal| ≤ tolerance and TCR trend within spec; report percentage out of spec and recommended lot rejection criteria (e.g., >2% units out of spec triggers investigation).
4 — How to verify NOMC16031003FT5step-by-step procedures (method / actionable)
Bench tests for electrical validation — give stepwise procedures for DC resistance, TCR (swept temperature), power dissipation test, and insulation/leakage tests. Content directioninclude required equipment settings, contact methods (Kelvin), safety notes, and acceptance thresholds.
Pointfollow explicit steps to validate electrical performance. EvidenceDC resistance use 4‑wire, TCR sweep in chamber, power test with controlled current ramp. Explanationexample DC test1 mA current source, 4‑wire, 10 readings averaged; TCRmeasure at −40/25/85°C and compute ppm/°C; power soakapply rated power for 1 hour and re‑measure resistance shift threshold ≤0.1%.
Reliability and stress testing recommendations — outline accelerated tests to expose failuresthermal cycling, power humidity bias, and surge/transient tests relevant to resistor networks. Content directionlist test durations, conditions, what to monitor (resistance shift, open elements), and suggested reporting format.
Pointaccelerated stress tests reveal marginal parts. Evidencethermal cycle 500 cycles −40/+125°C, HAST with bias for humidity susceptibility, and surge per expected field transients. Explanationmonitor for open circuits, >1% resistance drift, or insulation breakdown; report per unitpre/post resistance, percent shift, and condition that triggered failure.
5 — Application guidance, PCB integration & troubleshooting (case/action)
PCB layout, thermal management and derating checklist — practical layout tipsplacement, copper pour for thermal relief, decoupling, and derating rules for multi-element dissipation. Content directionprovide a short PCB checklist and example scenarios where mis-layout causes derating issues.
PointPCB layout materially affects derating and accuracy. Evidencecopper pours alter thermal resistance and can double allowed dissipation in some cases. Explanationchecklistverify footprint pad sizes, add thermal vias under high‑dissipation nets, avoid routing narrow traces under network, and allocate derating margin when multiple elements dissipate simultaneously.
Common failure modes and troubleshooting flowchart — identify typical problems (open elements, drift, imbalance), root-cause indicators, and stepwise troubleshooting actions (re-measure, thermal imaging, swap with known-good). Content directioninclude recommended corrective actions and when to reject a lot based on measured data.
Pointidentify quick root causes and remediation. Evidencecommon signs—open = infinite resistance, drift = temp/time correlated change, imbalance = mismatch between elements. Explanationtroubleshootingre‑measure with Kelvin, apply gentle power to observe heating, inspect solder joints, replace suspect units; reject lot if >2% units show drift beyond spec.
Summary
Verify the NOMC16031003FT5 against its datasheet and the provided test plans to confirm nominal resistance, TCR, and power handling before PCB sign‑off; document mean and σ for lot acceptance.
Use the included bench procedures and stress tests to expose marginal units; apply derating and PCB thermal controls to maintain long‑term stability and prevent drift.
Record structured test data (CSV) with ID, temp, measurement and pass/fail flags so system tolerance budgeting can accept or reject a lot based on quantitative criteria.
Frequently Asked Questions
What key measurements should be in NOMC16031003FT5 test data?
Measure DC resistance (4‑wire) at room temp, TCR across defined temperature points, power‑soak resistance shift, and inter‑element insulation/leakage. Capture sample mean, standard deviation and percent out‑of‑spec. Include measurement conditions and fixture details in the CSV for traceability.
How should an engineer measure resistor network TCR reliably?
Use a temperature chamber with a stable soak (≥15 min) at each setpoint and a four‑wire measurement. Compute ppm/°C from slope between two temperaturesTCR = (ΔR/R)/ΔT × 10⁶. Repeat on multiple samples and report mean and σ to assess lot variation.
When is a lot of resistor networks rejected based on test data?
Suggest rejecting a lot if >2% of sampled units exceed datasheet tolerance after conditioning, or if mean shift after power‑soak or thermal cycling exceeds the designed system margin. Document failure modes and perform root‑cause before rework or alternate sourcing.