LM393DG4

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The LM393DG4 is a low-power precision dual voltage comparator designed for use in a variety of circuits and applications. It operates from a single supply voltage from 2.7V to 20V and can be used in a wide range of frequency applications.

The LM393DG4 provides a precise voltage measurement with accuracy of ± 0.04% of full-scale. It is capable of detecting a wide range of input voltages and signals with a differential input range of 1.3V to 19.3V. The output is capable of providing a fast response time of 30ns, minimal deviation, and a wide output voltage swing range of -1V to +1V.

The comparator includes two precision reference voltage sources which are offered as either a reference with a fixed 0.6V and 1.2V or adjustable 0.8V and 1.6V. Additionally, the LM393DG4 features an open-collector configuration to ensure uninterrupted performance in the presence of an open power source, even during start-up.

The LM393DG4 is most typically used for wide range and multichannel voltage detection applications, such as automobile engines and thermocouples, as well as frequency and temperature control applications. It is available in an 8-pin PDIP, SOIC and MSOP package.

Working Principle

The working principle of the LM393DG4 lies in its ability to compare two inputs and output the correct result. The device is composed of two redefined voltage inputs, two comparators and an open-collector output. The two comparators compare the two inputs and output a logical result, such as a high logic output if the differential input is greater than the reference voltage, or a low logic output if otherwise.

The open-collector configuration enables the two comparators to function without interruption when an open power source is present, even during start-up. The device is capable of functioning with a single supply voltage, allowing it to operate in a variety of frequency applications.

Applications

The LM393DG4 is most typically used for wide range and multichannel voltage detection applications, such as automobile engines and thermocouples, as well as frequency and temperature control applications. Its robust design enables it to work even in extreme temperatures, high vibration, and high EMI environments. The device is well-suited for various monitoring and control applications in the industrial and automotive markets.

The LM393DG4 is ideal for use in applications such as engine control, over-temperature protection for motors, industrial process control systems, automotive and industrial analog measurements, and other general-purpose comparator applications. It can also be used in PIR sensors, proximity sensors, and level detectors.

The LM393DG4 is especially well-suited for low-power applications. The low operating power requirement allows the device to be mounted directly onto a PCB with minimal cooling effect.

Conclusion

The LM393DG4 is a precision dual voltage comparator ideal for wide range and multichannel voltage detection and control applications in extreme temperatures, high vibration, and high EMI environments. It operates from a single supply voltage from 2.7V to 20V and can be used in a wide range of frequency applications. It provides a precise voltage measurement with accuracy of ± 0.04% of full-scale and a fast response time of 30ns for minimal deviation. The open-collector configuration enables it to function without interruption when an open power source is present, even during start-up. Its low power consumption and robust design makes it perfect for various monitoring and control applications in the industrial and automotive markets.

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