LMC6762BIM/NOPB

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Linear-comparators are useful for comparing two input signals of different voltage levels and triggering or activating a control or response circuit. The LMC6762BIM/NOPB is one such comparator that takes two voltage inputs and determines if one is higher or lower than the other, thereby activating a response circuit. It features low power operation, low drift performance, adjustable hysteresis and an output stage designed to allow using an open drain. This application comparator also features a rail-to-rail input range.

Features

• Wide Input Range: 2.3V to 5.5V
• Low Input Offset Voltage: 75uV typ. at 25C
• Low Input Bias Current: 100nA typ. at 25C
• Low Output Saturation Voltage: 80mV typ.
• Low Supply Current: 300uA typ.

Application

The LMC6762BIM/NOPB is an ideal comparator for analog and logic level monitoring, with a wide operating temperature range from -40°C to +125°C. It is particularly useful in precision voltage monitoring applications, such as portable equipment, automotive and medical. The low voltage, low power operation makes it suitable for battery operated equipment. It has a very low input offset voltage, ideal for low voltage level detection.

Working Principle

The LMC6762BIM/NOPB comparator works in three main stages. Firstly, its two inputs (A and B) undergo amplification by the differential amplifier consisting of two N-Channel MOSFETs. Secondly, an output stage consisting of two P-Channel MOSFETs creates levels at the outputs OA and OB, depending on the difference between the A and B inputs. Lastly, the comparator has an internal hysteresis voltage which works like a threshold voltage to minimize potential oscillations when the two inputs are nearly equal.

The comparator compares the two input voltage values, A and B, and determines if one is higher or lower. Depending on the voltage levels, the comparator outputs a HIGH or LOW signal to the output stage, where it is converted to the appropriate output voltage levels. The hysteresis voltage works as a hysteresis threshold for the inputs, causing the output to remain on high or low based on the difference between the two inputs. This ensures smooth switching and helps minimize oscillations when the two inputs are nearly equal.

Conclusion

The LMC6762BIM/NOPB is an ideal comparator for analog and logic level monitoring. It offers low power operation, low drift performance and an adjustable hysteresis for stable operation even when the two inputs are nearly equal. And the rail-to-rail input range makes it suitable for a wide range of applications requiring precision voltage monitoring and level detection.

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