REF02Z

PMIC - Voltage Reference

A voltage reference, or reference voltage, is an adjustable voltage source that restricts the output to a fixed voltage at a given temperature and current. This can be used to create a certain reference level in a circuit and isolate it from system variables (such as temperature, voltage and current). The most common voltage reference are the family of linear voltage references such as the REF02Z, which provides a precision low-temperature-coefficient 2.5 V output.

The REF02Z Application and Working Principle is designed for applications that require a stable voltage reference over a wide range of temperatures, such as instrumentation and other low-power or high-resolution devices. The circuit of the REF02Z consists of a bandgap reference circuit, a trim potentiometer, a temperature sensing circuit, and an output buffer. The bandgap reference circuit provides the main reference voltage, which is set with the trimmer potentiometer. This provides temperature compensation and ensures a ±1.5 mV shift and a temperature coefficient of 8 ppm/°C.

The REF02Z provides an output current of up to 20 mA and can operate over a wide range of temperatures, from 0°C to 70°C. The precision and stability of the output voltage is determined by the underlying bandgap reference, which is key to the circuit’s performance. The REF02Z has a very low output impedance, making it an ideal voltage reference for applications where the output must remain constant over a wide range of temperatures.

The REF02Z is designed for use in circuits needing precision voltage references and for applications with high power or thermal requirements, such as digital cameras or robots. It is also commonly used for signal conditioning and signal processing in instrumentation, communications and data acquisition systems. Additionally, it can be used in linear regulators and precision power supplies.

Using the REF02Z for voltage references has a number of benefits. It is easy to use with very low current requirements, and its temperature coefficient provides reliable operation over a wide operating temperature range. It also offers excellent accuracy, stability and low power requirements, making it a preferred choice for use in precision circuits.

In summary, the REF02Z Application and Working Principle is an ideal voltage reference for applications requiring reliable and accurate voltage references over a wide range of temperatures with low power requirements. Compared to other voltage references, the REF02Z is easy to use, provides excellent accuracy and stability, and is an excellent choice for precision signals and circuits.