LM158N

Overview

The LM158N is a low-power dual operational amplifier manufactured by STMicroelectronics. It consists of two independent, high-gain, internally frequency-compensated op-amps designed for single power supply operation over a wide voltage range (3 V to 30 V). The device features a large DC voltage gain of 100 dB and a unity-gain bandwidth of 1.1 MHz. Key electrical characteristics include a low input bias current of 20 nA, an input offset voltage of 2 mV, and a supply current of approximately 1.2 mA at +5 V. It operates within a temperature range of -55°C to +125°C and is housed in a DIP-8 package.

Feature Summary

• Internally frequency compensated for stability without external components
• Operates from a single power supply with input common-mode voltage including ground
• Low supply current drain essentially independent of supply voltage magnitude
• Output voltage can swing to ground even when operated from a single supply

Applications

• Transducer amplifiers
• DC gain blocks
• Single power supply interface electronics

Procurement Notes

Verify the specific order code matches the required temperature grade and packaging format. Confirm that the DIP-8 package aligns with the target PCB footprint and assembly process. Ensure the selected variant meets all environmental compliance standards relevant to the intended deployment region.

Selection Notes

Select this component for applications requiring dual amplification on a single supply rail. It is suitable for systems where low power consumption is critical but does not demand ultra-low noise or precision offset specifications. Consider the available packages based on space constraints and thermal requirements.

Part Context

The LM158N belongs to the LM158/LM258/LM358 family of low-power dual operational amplifiers. While sharing core architecture, the 'LM158' designation specifically denotes the industrial temperature grade (-55°C to +125°C), distinguishing it from commercial variants like the LM358 which have a narrower operating range.

Replacement Considerations

LM258N: Compatible alternative with extended commercial temperature range (-40°C to +105°C). LM358N: Commercial grade version with limited temperature range (0°C to +70°C). Verify temperature specifications before substitution.