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.

Full-scale span (µT)

Required number input.

Converter resolution (bit)

Required integer input.

Estimate one ideal ADC code step in magnetic field from full-scale span and bit resolution; excludes sensor noise. 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]

Ideal code step (µT)

The resulting ideal code step returned as a number.

• Magnetic-field and heading results depend on axis alignment, calibration, hard- and soft-iron distortion, local inclination, temperature, nearby current, sensor saturation, and tilt compensation. A field magnitude alone does not provide a reliable compass heading.
• 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.

• ADC LSB Voltage

  Calculate one ideal ADC code width as full-scale input span divided by 2^N. Full-scale span is the high-to-low range, not necessarily the reference voltage for every ADC topology.

• Ideal ADC SNR

  Estimate ideal full-scale sine-wave signal-to-quantization-noise ratio as 6.02N+1.76 dB. Oversampling, thermal noise, distortion, and reduced input amplitude are not included.

• LSB Step Size

  Calculate the least-significant-bit step size of an ADC from its full-scale voltage.