REF02DSA+

PMIC - Voltage Reference: REF02DSA+ Application Field and Working Principle

Voltage reference is a key component in many electronic circuits, ensuring that the voltage output remains within a certain range. The most commonly used voltage references are either fixed voltage references (like the REF02DSA+) or adjustable voltage references (like the DS1883). In particular, the REF02DSA+ voltage reference by Texas Instruments is a precision, low-power voltage reference device. This device is ideal for use in a variety of consumer, industrial and automotive systems.

The REF02DSA+ device is a low-power and precision voltage reference. It contains a temperature-controlled zener diode for which the zener voltage can be set to a precise value ranging from 0.25V to 5.5V with a typical accuracy of 0.1%. The device is capable of supplying a maximum current of 120mA. The REF02DSA+ also contains a temperature-compensated bandgap circuitry that maintains the output voltage range at the set value despite variations in temperature. This ensures the accuracy of the voltage reference over a wide temperature range.

The REF02DSA+ device can be used in a wide range of applications. For example, it can be used as a precision voltage source in precision analog-to-digital converters (ADCs), industrial automation systems, automotive sensors and many other applications that require critical voltage control. The device can also be used as a fixed voltage reference in portable electronic devices such as handheld calculators and mobile phones.

The REF02DSA+ has a working principle that involves a combination of a diode and a bandgap reference source. When driven by a signal, such as from a voltage regulator, current from the diode is combined with the reference source to form a voltage-controlled current source. This current source then drives a current mirror circuit that maintains a stable output voltage. The device is protected by a temperature-compensated bandgap reference source, which ensures that the output voltage remains within a predetermined range.

Additionally, the REF02DSA+ contains several built-in protection features that allow it to operate safely in the most demanding environments. The device is protected against reverse polarity, short circuit, and over temperature conditions. It also provides protection against electrostatic discharge and electromagnetic interference.

In conclusion, the REF02DSA+ is a precision low-power voltage reference device designed for use in consumer, industrial, and automotive systems. The device is capable of supplying a maximum current of 120mA and contains a temperature-compensated bandgap circuitry that maintains the output voltage range at the set value despite variations in temperature. The device is protected by a temperature-compensated bandgap reference source, and contains several built-in protection features that allow it to operate safely in the most demanding environments.