LM1558H

Overview

The LM1558H is a dual operational amplifier manufactured by Texas Instruments, formerly National Semiconductor. It features a gain-bandwidth product of 1 MHz and a slew rate of 500 mV/us. The input offset voltage is specified at 5 mV with an input bias current of 500 nA. Operating on a supply voltage range from 6 V to 44 V, it delivers an output current of 45 mA per channel. Key performance metrics include a common-mode rejection ratio of 90 dB and a power supply rejection ratio of 77 dB. Input voltage noise density is 30 nV/sqrt Hz. The device operates within a temperature range of -55°C to +125°C and is housed in a TO-99-8 metal can package.

Feature Summary

• Dual-channel architecture providing two independent high-performance amplifiers in a single unit
• High common-mode rejection ratio ensuring accurate signal processing in noisy environments
• Wide operating temperature range suitable for demanding industrial applications
• Metal can packaging offering robust physical protection and thermal stability

Applications

• Industrial process control systems requiring precise analog signal conditioning
• Instrumentation circuits utilizing the high CMRR for differential signal amplification
• Military and aerospace electronic systems operating under extreme temperature conditions

Procurement Notes

Verify the manufacturer designation carefully as Texas Instruments acquired National Semiconductor; datasheets may reference either entity. Confirm the specific suffix 'H' corresponds to the TO-99-8 metal can package rather than plastic variants. Ensure the component meets RoHS compliance requirements if mandated by your project specifications. Cross-reference the part number against official Texas Instruments documentation to validate electrical parameters before integration into critical designs.

Selection Notes

Select this component when a dual op-amp solution is required with moderate bandwidth and high reliability. The TO-99-8 package is ideal for through-hole mounting in ruggedized or legacy hardware designs. Consider the 5 mV input offset voltage and 500 nA bias current when designing precision DC amplification stages. The wide supply voltage range allows flexibility in power system design without requiring complex level shifting.

Part Context

The LM1558 belongs to the LM1558 series of dual operational amplifiers. This family is characterized by its use in general-purpose analog applications where reliability is paramount. The transition from National Semiconductor to Texas Instruments has maintained the continuity of this specific part number, ensuring compatibility with existing circuit designs originally developed using National Semiconductor components.

Replacement Considerations

• LF412MH/NOPB

FAQ

What is the maximum supply voltage for the LM1558H?

The maximum supply voltage is 44 V.

Does the LM1558H support shutdown functionality?

No, the LM1558H does not have a shutdown feature.