NJM2903D

NJM2903D is classified as a linear comparator. It is a device used in electronic circuits in which two input signals are compared to one another and the resulting output indicates which of the signals is higher. Either a single supply voltage or a dual supply voltage can be used to power the device. The NJM2903D functions as a window comparator when the COMP terminal is connected to ground.

Main Characteristics

• Single supply voltage of 2.7V to +10.0V (-10V to +14V with dual supply voltage).
• Input voltage range of -0.3V to +Vcc
• High accuracy across temperatures (-40C to +125C)
• Extremely low quiescent current.

Operating Principles

The NJM2903D is a window comparator with two separate inputs, an upper limit voltage (Vu) and lower limit voltage (Vl). It operates in a hysteresis window of +Vub to -Vlb. If the Vu is greater than +Vub, the output is HIGH. Conversely, if Vl is less than -Vlb, the output is LOW. However, when Vl and Vu are both between +Vub and -Vlb, the output remains unchanged.

Application Fields

The NJM2903D can be used in a variety of applications including, but not limited to, audio and video equipment, level/order controls, and circuit protection. In audio and video equipment, it can be used to detect the level of audio and video signals in order to protect the speakers and other components from being over-driven. In level/order controls, it can be used to protect analog circuits from being over-powered. Additionally, it can be used as a circuit protection device in industrial controls and automation systems.

Conclusion

The NJM2903D is a linear comparator that is used in many applications. It can be powered by either a single supply voltage or a dual supply voltage, and operates in a hysteresis window. It is particularly useful for level/order controls, circuit protection, audio and video equipment, and industrial controls and automation systems.