LM4040AIZ-2.5

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power management integrated circuit (PMIC) is a specialized microchip with multiple peripheral circuits and static logic components designed to regulate and protect the performance of electronic equipment. Voltage reference is one type of PMIC, which is generally used to provide stable and exact voltage and current needed by an electronic device or component. LM4040AIZ-2.5 is one of the popular voltage references from Texas Instruments, and this article will explain the application fields and working principle of LM4040AIZ-2.5.

Application Field of LM4040AIZ-2.5

LM4040AIZ-2.5 is a low-power voltage reference in the adjustable version of the LM4040 family of precision micropower shunt voltage references. It has excellent temperature stability and is specifically designed for low-power and battery-powered systems. It can be used in automated test equipments, data acquisition systems and portable instruments. Additionally, it can be used as a reference voltage source for many applications such as voltage monitoring, temperature measurement and control, timing, analog-to-digital conversion, and in sensor applications. It is also suitable for telecommunications systems, instrumentation, and light current measurement.

Working Principle of LM4040AIZ-2.5

The LM4040AIZ-2.5 is built on a proprietary thin-film process, designed to deliver full performance at micropower levels of operation. The LM4040AIZ-2.5 uses an advanced buried Zener diode as the reference element. The device regulates the output voltage with a two-terminal integrated shunt regulator architecture to provide excellent temperature stability and micropower operation. It has a low reference voltage of 2.5V and a temperature coefficient of 1ppm/°C maximum over the -40°C to +85°C(short duration to +125°C) temperature range. It has a wide operating current range of 10uA to 600uA.

The series voltage regulator consists of a bandgap reference, a differential amplifier, an internal series pass element, and a current sink to package ground. The bandgap reference decides the reference voltage. The differential amplifier compares the reference voltage to the input voltage by a voltage divider. If the input voltage is lower than the reference voltage, the series pass element will transfer current from VIN to GND. Otherwise, the current sink will transfer current from ground to VIN to keep the output voltage stable. The bipolar device\'s output voltage will not exceed the specified reference voltage. The output voltage is determined by the bias of this pass element, which is usually controlled by an external resistor.

Conclusion

The LM4040AIZ-2.5 from Texas Instruments is an adjustable low-power precision shunt voltage reference with a wide range of applications. It is suitable for a variety of applications such as voltage monitoring, temperature measurement and control, timing, and analog-to-digital conversion, as well as for telecommunications systems, instruments, and light current measurement. The LM4040AIZ-2.5 uses an advanced buried Zener diode-based reference element and an integrated two-terminal shunt regulator architecture to achieve excellent temperature stability and micropower operation with a low reference voltage of 2.5V and a temperature coefficient of 1 ppm/C.

The specific data is subject to PDF, and the above content is for reference