LM1458M

Overview

The LM1458M is a dual operational amplifier manufactured by National Semiconductor, now part of Texas Instruments. It features two independent high-gain amplifiers within a single package. Key electrical parameters include a gain-bandwidth product of 1 MHz and a slew rate of 500 mV/us. The device supports a maximum supply voltage of 36 V and operates with a minimum supply voltage of 6 V. Each channel provides an output current capability of 45 mA. Input specifications include a voltage noise density of 30 nV/sqrt Hz and an input bias current of 500 nA. The component is housed in an SOIC-8 surface-mount package.

Feature Summary

• Dual-channel architecture providing two independent operational amplifiers
• High gain performance suitable for general-purpose applications
• Wide single or split power supply operation range

Applications

• General-purpose analog signal processing circuits
• Audio pre-amplification stages
• Sensor signal conditioning

Procurement Notes

Verify the manufacturer designation on the datasheet, as National Semiconductor operations were acquired by Texas Instruments. Confirm that the 'M' suffix corresponds to the SOIC-8 package type required for your PCB layout. Ensure the specific revision of the data sheet matches the production lot date code for compliance with RoHS directives if applicable.

Selection Notes

Select this component when a dual op-amp configuration is required in a compact surface-mount format. The 1 MHz bandwidth and 500 mV/us slew rate are adequate for low-frequency audio and sensor applications. Consider the 45 mA output drive capability against load requirements. Compare against the LM158 or LM258 variants if temperature range or specific electrical tolerances differ from industrial standards.

Part Context

The LM1458 belongs to the standard 4558 family of dual operational amplifiers. It is functionally similar to the LM158 but may offer specific military or industrial grade variations depending on the original National Semiconductor specification. The 'M' suffix denotes the SOIC-8 plastic small-outline integrated circuit package, distinguishing it from through-hole DIP versions.

Replacement Considerations

• LM158M
• LM258M
• BA4558RF-E2

FAQ

What is the package type for the LM1458M?

The 'M' suffix indicates an SOIC-8 (Small Outline Integrated Circuit) surface-mount package.

Is the LM1458M compatible with the LM158?

Yes, the LM1458 is generally pin-compatible and functionally similar to the LM158, though specific electrical characteristics like temperature range should be verified against the datasheet.