LM158QT

Overview

The LM158QT is a dual operational amplifier from STMicroelectronics, featuring two independent, high-gain, internally frequency-compensated amplifiers. Designed for single power supply operation over a wide voltage range (3V to 30V), it offers low power supply drain independent of voltage magnitude. Key electrical parameters include a gain-bandwidth product of 1.1 MHz, input bias current of 20 nA, and input offset voltage of 2 mV. The device supports ground-referenced input common-mode voltage and output swing down to 0 V.

Feature Summary

• Internally frequency compensated for stability in standard op-amp configurations
• Low power supply drain essentially independent of the magnitude of the power supply voltage
• Input common-mode voltage range includes ground, allowing direct interface with logic systems

Applications

• Transducer amplifiers
• DC gain blocks
• Single power supply system implementations

Procurement Notes

Verify the specific package suffix 'QT' against official STMicroelectronics documentation to confirm the exact physical package type and tape-and-reel specifications. Ensure the component meets AEC-Q100 automotive qualification requirements if intended for automotive applications. Cross-reference datasheet revisions to confirm parameter consistency.

Selection Notes

Select this component when designing circuits requiring operation from a single power supply without negative rails. It is suitable for applications needing internal frequency compensation and low quiescent current. Consider the 1.1 MHz bandwidth and 2 mV offset voltage for precision requirements. Verify thermal performance within the -55°C to 125°C operating temperature range.

Part Context

The LM158 series consists of dual operational amplifiers designed for versatile use in single-supply environments. The 'QT' suffix typically denotes a specific surface-mount package variant, such as TSSOP or similar, available in tape-and-reel format. This series allows for easy implementation in systems powered by standard logic voltages like +5V.

FAQ

Does the LM158QT support input common-mode voltage at ground?

Yes, the input common-mode voltage range includes ground, even when operated from a single power supply voltage.

What is the typical supply current characteristic of the LM158QT?

The supply current per channel is very low and essentially independent of the supply voltage magnitude.