The 20-bit DAC11001A is a highly accurate, low-noise, voltage-output, single-channel, digital-to-analog converters (DACs). The DAC11001 are specified monotonic by design, and offer excellent linearity of less than 4 LSB (max) across all ranges. The unbuffered voltage output offers low noise performance (7 nV/√Hz) in combination with a fast settling time (1µs), making this device an excellent choice for low-noise, fast control-loop, and waveform generation applications. When designing for these applications, its is necessary to calculate the total error contributed by the DAC and the associated circuit components. This report helps in understanding various DAC errors and how to calculate the total error in the system.