Temperature Sensitivity

Temperature Sensitivity (Premium) #

Component values drift with temperature. With a Premium subscription you can set the circuit’s operating temperature and give components temperature coefficients so your simulation reflects how the design behaves when it heats up or cools down.

This is not a separate analysis mode — you set the temperature and the coefficients, then run a normal simulation.

What you can set #

  • Operating temperature — the ambient temperature used for the run (default 27°C). Adjusting it is a Premium feature.
  • TC1 / TC2 — first- and second-order temperature coefficients on resistors, capacitors, inductors, and wires. These are Premium parameters.

Temperature-dependent value is calculated as:

X(T) = X₀ × (1 + TC1·(T − T₀) + TC2·(T − T₀)²)

where T₀ is the reference temperature.

When to use it #

  • Designs that must work over a wide range (e.g. outdoor or automotive use).
  • Precision circuits where thermal drift matters (references, oscillators, amplifiers).
  • Checking that bias points stay valid as the circuit warms up.

Tips #

  • Use coefficients from the part’s datasheet (often given in ppm/°C — 50 ppm/°C is TC1 = 50e-6).
  • Compensate drift by pairing components with opposing coefficients.
  • Combine with Tolerance & Monte Carlo to see thermal and manufacturing variation together.

See also #