About The ADC and DAC Converter Calculator

The ADC and DAC Converter Calculator estimates LSB size, ADC code for an analog voltage, and DAC output for a digital code using a selected resolution and reference voltage.

How to Use the ADC/DAC Calculator Online

1. Enter converter resolution and reference voltage.
2. Enter an analog input voltage for ADC conversion and a digital code for DAC conversion.
3. Run the calculator to review LSB size, ADC code, and DAC voltage.

Choosing Options Correctly

Use the real converter resolution and reference voltage from the datasheet or circuit. Input range, offset, gain error, INL/DNL, noise, source impedance, and reference tolerance are not modeled.

Common Use Cases

• Check expected ADC counts from a sensor voltage.
• Estimate DAC output voltage for firmware values.
• Compare bit depth and reference-voltage effects.

Quick FAQ

Does this include calibration error?
No. It handles ideal quantization math, not offset, gain error, INL, DNL, noise, or reference drift.

What happens if Vin exceeds Vref?
The ideal ADC code saturates at the maximum code, but real hardware may need input protection and absolute maximum checks.

Why is Vref important?
Vref defines the code step size. A noisy or inaccurate reference directly affects conversion accuracy.

Can I use this for firmware scaling?
Yes for a first check, then confirm rounding, full-scale convention, signed/unsigned format, and calibration constants in firmware.