Voltage ADC Calc

?

ADC to Voltage Calculator Help

What is this tool?

This calculator converts between analog voltage values and their digital representations (ADC values) for microcontrollers and digital systems.

How to use:

  1. Select whether you want to calculate an ADC value or a Voltage
  2. Enter your input value (voltage or ADC value)
  3. Select the ADC resolution (8-bit, 10-bit, 12-bit, or 16-bit)
  4. Enter the reference voltage of your system
  5. Click "Convert" to see the result

The Formulas

Voltage from ADC Value: \[ \text{Voltage} = \left( \frac{\text{ADC Value}}{2^{\text{Resolution}} - 1} \right) \times V_{\text{ref}} \]

ADC Value from Voltage: \[ \text{ADC Value} = \left( \frac{\text{Voltage}}{V_{\text{ref}}} \right) \times (2^{\text{Resolution}} - 1) \]

Examples:

Example 1: For a 10-bit ADC with Vref of 5V, an ADC value of 512 represents a voltage of approximately 2.5V.

Example 2: For a 12-bit ADC with Vref of 3.3V, a voltage of 1.65V would give an ADC value of 2048.

Common Errors: