LMC7225IM5X/NOPB

Linear comparators are specialized op-amp circuits that compare two analog input signals and produce an digital output based on the relative signal levels. Generally, linear comparators perform better than generic op-amps for signal comparison tasks and their small size makes them ideal for very low power applications. The LMC7225IM5X/NOPB is a low snubber low-power low-offset voltage single-supply comparator with rail-to-rail input from Texas Instruments. This device is designed to provide reliable performance for signal-conditioning, motor control and sampling applications.

The LMC7225IM5X/NOPB is available in space-saving packages that are compatible with high-temperature reflow soldering processes and offers an extended temperature range (-40°C to +85°C). Customers often include this device in IoT (Internet of Things), smart energy and home automation applications.

The device has two matched unity-gain cascoded high-impedance inputs. Its input range includes the negative rail and its rail-to-rail characteristics make it less sensitive to noise. The hysteresis level is programmable with an external resistor, eliminating component temperature drift and eliminating the need for trimming. Another attractive feature of the LMC7225IM5X/NOPB is its low offset voltage and wide unity-gain bandwidth (15 MHz).

The typical output current of the comparator is 2.5 mA but the device can source up to 4 mA. Its open-drain output structure enables it to handle larger currents than a typical open-collector output structure without having to worry about saturating. The output is pin-compatible with some low-power logic families, allowing for easy interfacing with digital circuitry.

The working principle of the LMC7225IM5X/NOPB comparator is straightforward. An input signal is compared to a reference voltage, and when the input voltage exceeds the reference voltage the output assumes a digital high (VOH). When the input voltage below the reference voltage, the output assumes a digital low (VOL). The output remains latched in that state until the input voltage reverses the logic level and the comparator\'s output changes state. The output of the comparator will oscillate back and forth until the input voltage is clamped at the reference or latch point level.

In addition to its basic comparing functions, the device can be used for linear applications such as a sample/hold circuit and gain amplifier where a high/low output is translated into a voltage level by the comparator.

The LMC7225IM5X/NOPB is a well-rounded comparator that offers superior performance in a small package. The high-impedance inputs, rail-to-rail input range, low offset voltage and wide bandwidth make the device suitable for many different applications. Its compatibility with low-power logic families and extended temperature range make it an ideal choice for IoT and smart energy applications.