LM2901DR2G

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Linear-Comparators are a type of active devices that finds wide applications in a variety of fields. Generally speaking, the comparative function provided by these components help in comparing different electrical levels and generating a logical output accordingly. The LM2901DR2G is a typical Comparator belonging to this category that is used in various industrial applications. This article will focus on providing an insight into the application field of LM2901DR2G and its working principle.

Description of LM2901DR2G

LM2901DR2G is a single operational amplifier that belongs to the Comparator family. It is manufactured using bipolar technology and includes two input differential pins and one output pin. Additionally, it makes use of LM2901 series of operational amplifiers characterized by superb parameters such as low voltage drop, excellent offset voltage and high gain bandwidth. The device is suitable for cases when low power dissipation and small size is a priority. This product is featured in an eight pin TSSOP package.

Working Principle of LM2901DR2G

The logic output from LM2901DR2G is basically an open-collector type of configuration. Typically, the Output pin is set high when the voltage at A-pin is greater than that at B-pin. The preceding statement holds true when the Unit is biased properly. Bias is established by connecting an external resistor (connected between A-pin and B-pin) to the ground. Oppositely, the output is set low when the situation is reverse. This comparator can also be employed as a comparator with hysteresis by simply using two external resistors connected between the bias voltage at A-pin and B-pin. The LM2901DR2G is also provided with an adjustable output voltage by simply using two external resistors. The device continues to function even in power-saving modes like shutdown/sleep/standby.

Application Field of LM2901DR2G

Due to its high tolerance range and excellent accuracy, the LM2901DR2G has been used in multiple applications especially in the industrial field. Some of the noted applications include switching power supplies and solenoids. Additionally, since the comparative nature of this device the LM2901DR2G is majorly used for precise comparison between two voltages levels. Other major applications of the LM2901DR2G include;

• Monitoring of battery levels
• Comparing of temperature sensors
• Comparator of logic levels
• Voltage and current measuring applications
• Signal conditioning

The LM2901DR2G is also employed as amplifiers in audio pre-amp boards and student-level projects. Also, since this component has no latch-up it is also used in breadboard-based circuits and quick prototyping.

Conclusion

Summing up, the LM2901DR2G is a highly efficient comparator which despite its small size can be used in a wide range of applications. Its open-collector configuration and fast switching capability helps in identifying two electrical level input signals and providing an output accordingly. The above mentioned points provide a brief explanation of application field and working principle of LM2901DR2G.

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