STMicroelectronics LM139AN Low-Power Quad Voltage Comparators

The LM139AN from STMicroelectronics is a precision quad comparator known for its low power consumption and wide voltage range, making it an ideal choice for battery-powered applications. This device consists of four independent voltage comparators designed to operate from a single power supply over a wide range of voltages. It can also be used with dual supplies, further enhancing its flexibility in various circuit configurations.

With its capability to operate from a single power supply of +2V to +36V or dual supplies of ±1V to ±18V, the LM139AN is a versatile component suitable for a multitude of applications including limit comparators, simple analog to digital converters, pulse, square wave and time delay generators, and many other functions. The low supply current drain is independent of the magnitude of the power supply voltage, which significantly improves the efficiency of the overall design.

Key features of the LM139AN include:

• Wide single supply voltage range or dual supplies for all devices: +2V to +36V or ±1V to ±18V
• Very low supply current drain (0.8 mA) independent of supply voltage (1 mW/comparator at +5V)
• Low input biasing current of 25 nA, and low input offset current of ±5 nA, which ensures high accuracy
• Low input offset voltage of ±1 mV and input common-mode voltage range includes ground
• Differential input voltage range equal to the power supply voltage
• Low output saturation voltage of 250 mV at 4 mA, which is important for driving loads
• Output voltage compatible with TTL, DTL, ECL, MOS, and CMOS logic systems