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.

Reference voltage (V)

Required number input.

Resolution (bits)

Required integer input.

Digital code

Required integer input.

Calculate an ideal unipolar DAC code's voltage as Vref×code/2^N. The top code is one LSB below Vref; this does not include offset, gain, or integral nonlinearity. 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]

Output Voltage V

The resulting output voltage v returned as a number.

• DAC calculations depend on resolution, coding, reference range, load, settling interval, update rate, and whether endpoints or code centers define an LSB. INL, DNL, glitch energy, output impedance, reference noise, and reconstruction filtering require device data.
• 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.

• Op-Amp Open-Loop Gain

  Calculate open-loop voltage gain A=Vout/(V+−V−) from an unsaturated operating-point measurement. Differential input cannot be zero; this scalar does not capture frequency-dependent gain.

• Supercapacitor RC Time Constant

  Calculate τ=RC for a supercapacitor and a series or load resistance. This ideal first-order time constant does not model voltage-dependent capacitance or leakage.