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Linear - Comparators

Comparators are devices that compare two voltages or currents and sometimes are also used to explore difference in periods of square waves. Linear comparators are integrated circuits (ICs) which use the principle of direct current (DC) circuits and usually feature high speed response time and low power consumption. It is widly used in applications such as motor controlling, power supply and timing circuits. One of the most popular comparator ICs on the market is the MIC841LYMT-T5.

Summary

The MIC841LYMT-T5 is a fast-speed, low power consuming linear-comparator that is especially suited for applications such as motor controlling, power supply and timing circuits. Its features including single supply operation 2.4V to 5.5V, high-speed (–15V rail-to-rail) operation, Low Input Bias Current, low THD and low output saturation voltage.

Working Principle

The MIC841LYMT-T5 comprises of two transistors and two diodes, one for each of the two inputs. The transistors act as switches and control the logical state of the output. When one of the two inputs is at a higher potential than the other, the corresponding diode will start to conduct, which flows current to the output transistor and causes it to switch on. If the potential difference across the inputs is reversed, the output transistor will switch off and the output level will change.

The MIC841LYMT-T5 also has a feature known as over-voltage lockout, which ensures that the output transistor stays switched off if the input potentials exceed therated limits. This prevents damage due to overvoltage conditions.

Application Field

The MIC841LYMT-T5 is suitable for a wide range of applications such as motor controlling, power supply and timing circuits. It is especially suited for applications that requirehigh speed operation and low power consumption, such as digital calibration systems, medical instrumentation circuits and mobile phone applications.

The MIC841LYMT-T5 is also suited for applications such as data acquisition for digital systems and for providing hysteresis for voltages by driving an AC switch or amplifier.

In automotive systems, the MIC841LYMT-T5 can be used for fail safe applications, where a malfunctioning component can be isolated from the main power system, preventing incorrect readings or signals.

Conclusion

The MIC841LYMT-T5 has been widely accepted as one of the premier linear-comparator ICs on the market, due to its high speed response time, low output saturation voltage and low power consumption, as well as its wide range of applications. By utilising the principels of direct current circuits, the MIC841LYMT-T5 provides a reliable, fast and low-power solution for motor controlling, power supply and timing circuits, data acquisition and digital systems, as well as automotive systems.

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