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Sensor Sampling Rate Calculator

Work out sensor sampling rate instantly with clear inputs, formula shown and shareable results.

About Sensor Sampling Rate Calculator

Sampling must exceed twice the signal bandwidth, and oversampling beyond that buys anti-alias filter margin plus noise reduction of 3 dB per doubling. A multiplexed ADC must then run at the per-channel rate times the channel count, which is what sets the required conversion time.

Formula

Sampling rate

fs per channel = 2 x bandwidth x oversampling; ADC rate = fs x channels

Worked example

With the default values below, Sensor Sampling Rate Calculator returns Sample rate per channel of 1,920.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Signal bandwidth
120 Hz
Oversampling factor
8 x
Channels multiplexed
6 channels

Results

Sample rate per channel
1,920.00 Hz
Total ADC conversion rate
11,520 Hz
Time available per conversion
86.81 µs
Nyquist minimum rate
240.00 Hz

Step by step

  1. 1Values used
  2. 2Sampling rate
  3. 3Sample rate per channel= 1,920.00 Hz
  4. 4Total ADC conversion rate= 11,520 Hz
  5. 5Time available per conversion= 86.81 µs
  6. 6Nyquist minimum rate= 240.00 Hz

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why oversample at all?

It relaxes the analogue anti-alias filter, allows digital decimation filtering, and spreads quantisation noise over a wider band so filtering recovers resolution.

What does multiplexing cost?

Settling time. The input must settle after each channel switch, so the usable conversion rate is lower than the ADC's headline figure.

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