KA741I

Overview

The KA741I is a single general-purpose operational amplifier manufactured by onsemi (formerly Fairchild Semiconductor). It features internal frequency compensation and short circuit protection. The device operates within an extended industrial temperature range of -40°C to +85°C. Key electrical specifications include a maximum input offset voltage of 6.0 mV, a typical slew rate of 0.5 V/µs, and a supply current of 2.8 mA at ±15V. It supports dual supply voltages up to ±18V and offers high input voltage ranges.

Feature Summary

• Internal frequency compensation for stability in feedback configurations
• Short circuit protection for output stage safety
• Extended operating temperature range suitable for industrial environments
• High input voltage range capability

Applications

• Integrator circuits
• Summing amplifiers
• General feedback applications

Procurement Notes

Verify the manufacturer origin as onsemi or its predecessor Fairchild Semiconductor when sourcing this component. Confirm that the specific part number KA741I corresponds to the 8-DIP package variant with the -40°C to +85°C temperature rating. Ensure compatibility with standard DIP-8 footprints during integration.

Selection Notes

Select the KA741I over the commercial grade KA741 when operation in colder environments below 0°C is required. This variant provides guaranteed performance down to -40°C. Consider the 8-DIP package for through-hole mounting requirements. Evaluate the 6.0 mV max input offset voltage against application sensitivity needs.

Part Context

This component belongs to the KA741 series of general-purpose operational amplifiers. The 'I' suffix specifically denotes the industrial temperature grade (-40°C to +85°C), distinguishing it from the commercial grade 'KA741' which operates from 0°C to +70°C. Both share identical electrical characteristics but differ in thermal endurance.

Replacement Considerations

Compatible substitutes include the KA741C and LM741 variants. Verify pinout compatibility and ensure the replacement meets the -40°C to +85°C temperature requirement if replacing the KA741I specifically.

FAQ

What is the difference between the KA741 and KA741I?

The primary difference is the operating temperature range. The KA741I supports -40°C to +85°C, while the standard KA741 supports 0°C to +70°C.

Does the KA741I have offset nulling capability?

Yes, the datasheet indicates the ability to null the offset voltage using an appropriately valued potentiometer connected to the designated pins.