TLC339CPWR

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The Texas Instruments TLC339CPWR is a precision logic single supply quad comparator device (Linear – Comparators). It features high speed operation and designed for low power consumption at a power supply voltage range from 2.7 V to 5.5 V. This device provides high-bandwidth open-drain outputs that can be connected together for additional fan-in capability. This device operates as a quad single supply comparator, which allows for a single voltage rail operation.

The application field of the TLC339CPWR includes data acquisition circuits, precision level shifting, RF signal and audio signal detections, over-temperature protective and other control circuits.

The TLC339CPWR performs a comparison of the common-mode signal to the reference voltages and produces an output when a separate signal applied to the inverting and non-inverting terminals exceeds the reference voltage. This device has two separate comparator blocks with one common output each and also includes a logic block to allow the blocks to be operated in parallel.

The working principle of the TLC339CPWR can be divided into three steps. Firstly, a bias current source generates an offset voltage between the Negative Comparator Input (NCI) and the Positive Comparator Input (PCI). This offset voltage is added to the voltage at the NCI, making it the reference voltage. Secondly, when the voltage at the PCI is greater than the reference voltage, the output will be switched High. Lastly, when the voltage at the PCI is lower than the reference voltage, the output will be switched Low.

In the TLC339CPWR, the connection between the common-mode voltage and the reference voltage determines the type of comparison – either an ordinary, or low-offset, or “ground sense” EGT (edge-triggered). In ordinary comparison, the comparison is made between the common-mode voltage and the reference voltage. In low-offset comparison, the comparison is made between the common-mode voltage and the reference voltage minus the offset voltage. In “ground sense” EGT comparison, the comparison is made between the common-mode voltage and the “true ground”, where the true ground is the reference voltage minus the offset voltage.

The TLC339CPWR includes many features to ensure accuracy and reliability of the comparison process. These include wide operating supply voltage range and temperature coefficient, low input bias current, and compatibility with high input voltage levels. Other features include built-in hysteresis and Schmitt Trigger action, aiding in ensuring accuracy and maintaining speed even in noisy environments. The Schmitt Trigger action also helps protect against false triggering.

Overall, the TLC339CPWR is a powerful comparator device which can be used in many different fields. It offers precision level comparison operation, wide operating voltage range, low power consumption, and fast switching time. Its wide operating temperature range and low input bias current ensures accuracy and reliability. The built-in hysteresis and Schmitt trigger provide robustness and immunity to noise.

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