STMicroelectronics LM139DT Quad Comparator

The LM139DT from STMicroelectronics is a high-performance, low-power quad voltage comparator designed to operate over a wide range of voltages, from a single 2V supply up to a dual ±18V supply. This versatile component is housed in a compact SO-14 package, making it suitable for space-constrained applications while offering the reliability and robustness expected from a leading semiconductor manufacturer.

Each of the four independent comparators is designed to accurately compare two input voltages and provide a corresponding output based on which input is higher. The LM139DT offers a typical input offset voltage of 2 mV, a low input bias current, and a low input offset current, which makes it ideal for precision applications where minimal error and stability are crucial.

Key Features:

• Wide Supply Voltage Range: The LM139DT can operate with a single supply voltage from 2V to 36V or a dual supply voltage from ±1V to ±18V, granting it the flexibility to be used in a wide array of electronic circuits.
• Low Supply Current Drain: Its low supply current drain is independent of the supply voltage, which results in reduced power consumption and makes it suitable for battery-powered devices.
• Low Input Biasing Current: The device features a low input biasing current, which is critical for high-impedance sensor applications and precision measurement systems.
• Fast Response Time: The LM139DT boasts a typical response time of 1.3 microseconds, ensuring quick and accurate performance in time-sensitive applications.
• Common Mode Input Voltage Range: Includes ground, allowing direct sensing near ground.
• Differential Input Voltage Range: Equal to the supply voltage, which enhances the comparator's flexibility.

Applications:

The LM139DT is suitable for various applications, including limit comparators, simple analog to digital converters, pulse, square wave and time delay generators, voltage monitoring, and other circuits requiring low input offset voltage. Its robust design and versatile nature make it an excellent choice for designers looking to create reliable and efficient electronic systems.

With its combination of high precision, low power consumption, and broad voltage compatibility, the LM139DT from STMicroelectronics stands as a smart choice for any application requiring a reliable quad comparator.