LM2901AVQDRG4

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The LM2901AVQDRG4 is a precision integrated circuit (IC) solution within the Linear – Comparators series. Developed by Texas Instruments, the chip is a quad differential comparator, meaning it contains four independent voltage comparators within the same package. It is widely used in many different applications.

A comparator is an electronic circuit which performs a basic comparison operation using two signals, one of which is to be used as a reference point. The output of a comparator is either a high logic level or a low logic level depending on whether the input voltage is higher or lower than the reference voltage. Comparators are used primarily for comparing two analogue voltages and for generating a single output accordingly.

Its main two applications are as a Schmitt Trigger and as a Pulse Width Modulator. In a Schmitt trigger circuit, the output voltage level is liable to switch whenever the input voltage passes a certain threshold value, as set by the reference voltage. This can also be used as a type of oscillator, as the voltage switches back and forth between the threshold values. A Pulse Width Modulator uses a similar concept in order to create a pulsed output signal whose width can be modulated by a control signal.

The LM2901AVQDRG4 works by comparing two separate input voltages, INA and INB. When either input voltage is higher than the other, an output is generated that is high or low depending on the difference between the two input voltages. This output can then be used to drive further circuits in a Schmitt trigger or Pulse Width Modulation configuration.

The LM2901AVQDRG4 is built with a series of four individual voltage comparator circuits, each with its own reference voltage source and output pin. These are housed within a 14-lead plastic dual in-line package (PDIP). It operates on both 5 V and 10 V supplies, and has an open collector output that can sink up to 7 mA current. Its response time of 2.5 µs ensures fast switching, allowing minimal signal distortion. The power supply requirements are extremely low, making it ideal for battery-powered devices.

The LM2901AVQDRG4 is an excellent choice for applications requiring precise comparison between input voltages. Its low power consumption, small form factor and fast switching make it ideal for use in portable and automotive electronics. The device’s low cost, readily available packages and wide selection of packages make it popular among many different engineers.

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