Voltage references (VREF) are beneficial and often necessary for high-accuracy signal chain applications. This is because a standard signal chain contains a data converter, such as the Analog-to-digital converter (ADC) or Digital-to-analog converter (DAC), which measures or creates a precise signal. In the signal chain, the voltage reference output is typically the most precise voltage available to a data converter because many signal chain applications are sensitive to variations in gain error or noise error. Designers must consider how an error can impact the system. Understanding the various voltage reference errors of voltage reference errors is important for recognizing the benefits and limitations of integrated voltage references versus external voltage references.