LM158WDT

Overview

The LM158WDT is a dual operational amplifier manufactured by STMicroelectronics, housed in an 8-WSON surface-mount package. It features two independent, high-gain, internally frequency-compensated amplifiers designed for single-supply operation over a wide voltage range. Key electrical parameters include a gain-bandwidth product of 1.1 MHz and a slew rate of 600 mV/µs. The device operates with a supply voltage from 3 V to 30 V and draws a typical supply current of 700 µA for both channels. Input characteristics include a bias current of 20 nA and an offset voltage of 5 mV. It supports output currents up to 40 mA per channel and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Internally frequency compensated for stability without external components
• Single-supply operation capability including ground-referenced input and output
• Low power consumption largely independent of supply voltage magnitude
• Wide common-mode and differential input voltage ranges

Applications

• Transducer amplifiers
• DC gain blocks
• Interface electronics for logic systems

Procurement Notes

Verify the specific suffix 'WDT' corresponds to the 8-WSON package and tape-and-reel packaging configuration. Confirm that the ordering part number matches the required temperature grade and automotive qualification status if applicable. Cross-reference the manufacturer's latest datasheet revision to ensure pinout compatibility and parameter updates before finalizing procurement orders.

Selection Notes

Select this component when low power dissipation and single-supply compatibility are critical design constraints. The internal frequency compensation simplifies circuit layout by eliminating external compensation capacitors. Ensure the application requires the specified 1.1 MHz bandwidth and 40 mA output drive capability. Verify that the 8-WSON package dimensions fit the available PCB real estate and thermal management requirements.

Part Context

This device belongs to the LM158 family of dual operational amplifiers produced by STMicroelectronics. It shares functional similarities with industry-standard parts like the LM358 but offers specific performance characteristics tailored for low-power applications. The WDT suffix indicates a specific surface-mount package variant optimized for automated assembly processes in modern electronic manufacturing.

Replacement Considerations

Direct substitutes may include other dual op-amps from the same family or compatible generics such as the LM358DT. Verify pinout compatibility and electrical parameter equivalence, particularly regarding supply voltage range and output swing characteristics, before implementing any cross-brand replacements.