DAC Calculator

A Digital-to-Analog Converter (DAC) translates a digital number into a real-world voltage — used in audio equipment, microcontrollers, and signal processing circuits. Enter your reference voltage, number of bits (4 to 24-bit resolution), and digital input code into the DAC Calculator to get the output voltage. Secondary outputs include LSB resolution (the smallest voltage step), maximum output voltage, binary representation, and the input's percentage of full scale.

V

The maximum voltage that the DAC can output

Resolution of the DAC

Decimal value of the digital input

Binary representation of the digital input

Results

Output Voltage

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LSB Resolution

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Maximum Output

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Binary Input

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% of Full Scale

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Frequently Asked Questions

How does a Digital-to-Analog Converter (DAC) work?

A DAC converts digital binary codes into analog voltages. Each bit position represents a specific voltage level, with higher-order bits contributing larger voltages. The total output is the sum of all active bit contributions.

What is LSB resolution in a DAC?

LSB (Least Significant Bit) resolution is the smallest voltage change the DAC can produce. It equals the reference voltage divided by 2^n, where n is the number of bits. Higher bit resolution means finer voltage control.

How do I calculate DAC output voltage?

DAC output voltage = (Digital Input Code / Maximum Code) × Reference Voltage. For an n-bit DAC, the maximum code is 2^n - 1. The digital input code is the decimal equivalent of your binary input.

What affects DAC accuracy and precision?

DAC accuracy depends on the reference voltage stability, number of bits (resolution), and internal circuit precision. More bits provide finer resolution, while a stable reference voltage ensures consistent output.

Can I use different voltage units with this calculator?

Yes, the calculator supports millivolts (mV), volts (V), and kilovolts (kV). Simply select your preferred unit and enter the reference voltage in that unit for accurate calculations.

What is the difference between unipolar and bipolar DACs?

Unipolar DACs output voltages from 0V to +Vref, while bipolar DACs can output both positive and negative voltages. This calculator assumes unipolar operation from 0V to the reference voltage.

How many bits should I choose for my DAC application?

Choose bits based on required precision. 8-bit provides 256 levels, 12-bit gives 4096 levels, and 16-bit offers 65536 levels. Higher resolution means more precise control but typically costs more and may be slower.