Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Finger pitch (µm)

Interdigital transducer finger pitch.

Acoustic velocity (m/s)

Acoustic surface-wave velocity on the substrate in metres per second.

Compute the center frequency of a SAW transducer from its interdigital finger pitch and acoustic velocity; the acoustic wavelength is twice the finger pitch. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Center frequency (MHz)

Center frequency of the SAW filter response.

• SAW filter center frequency and response depend on substrate, lithographic geometry, acoustic velocity, temperature, packaging, source and load impedance, insertion loss, bandwidth, and fabrication tolerance. A center-frequency calculation does not specify the full transfer function.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Common Mode Filter Attenuation

  Estimate common-mode series-filter insertion loss into a resistive load from measured complex common-mode impedance at the selected frequency; source impedance is assumed zero.

• Differential Mode Filter Attenuation

  Estimate differential-mode series-filter insertion loss into a resistive load from measured complex differential-mode impedance at the selected frequency; source impedance is assumed zero.

• EMI Filter Cutoff

  Compute the cutoff frequency in kilohertz of an LC EMI filter from its inductance and capacitance using SI units.