REF3140TDD2

PMIC - Voltage Reference

A voltage reference is a precision voltage source designed to produce a fixed, stable output voltage, regardless of changes in the operating temperature, supply voltage and circuit loading. These devices are commonly used in precision measurement systems, such as thermal regulators, thermometers, and micro controllers, which require a reliable voltage reference. The REF3140TDD2 voltage reference by Texas Instruments is a monolithic IC with a 3.0V precision reference.

Application Fields

The REF3140TDD2 is specifically designed for automatic test equipment, smart meters, battery-powered instruments, and Measurement and Control systems. It can be used in both analog and digital applications such as precision A/D converters, temperature sensors, and digital logic. The REF3140TDD2 is designed for applications that require highly stable output voltage, low temperature drift and high accuracy.

Working Principle:

The REF3140TDD2 voltage reference is a single-chip integrated circuit, offering a precise voltage generated from a bandgap reference. It operates in two-wire mode, requiring only a supply voltage and a ground connection. The REF3140TDD2 features an adjustable current source and is capable of driving up to 16mA of output current. It is also capable of sinking up to 10mA of input current.

The REF3140TDD2 utilizes a bandgap reference cell to generate a precise output voltage. This voltage is then amplified and compared against an AC signal generated by a resistive divider network. This AC signal allows the reference to accurately adjust its output voltage to the precise target value. The output voltage is then regulated utilizing a low power CMOS transistor and low drift resistors.

The REF3140TDD2 offers a wide temperature range, with a 0.1% temperature coefficient, as well as excellent supply voltage rejection. It also features reverse polarity protection, overvoltage protection and ESD protection to ensure stable operation.

Conclusion:

The REF3140TDD2 voltage reference by Texas Instruments provides a precise, stable output voltage that is ideal for use in precision measurement and control systems. Its monolithic IC design offers a wide temperature range, excellent supply voltage rejection, reverse polarity protection and ESD protection. The REF3140TDD2 can be used for both analog and digital applications and is capable of driving up to 16mA of output current.