LM158A MDR

Overview

The LM158A MDR is a military-grade dual operational amplifier manufactured by Texas Instruments. It features two internally compensated amplifiers designed for single or split power supply operation. The device supports a wide voltage range from 3V to 32V single supply or ±1.5V to ±16V dual supply. Key electrical characteristics include a large DC voltage gain of 100 dB, a unity-gain bandwidth of 1 MHz, and a very low supply current drain of 500 μA. Input offset voltage is specified at a maximum of 4.0 mV, with an input bias current of -100 nA. The component operates within a temperature range of -55°C to +125°C.

Feature Summary

• Two independent high-gain operational amplifiers with internal frequency compensation
• Radiation specification available with high dose rate tolerance up to 100 krad(Si)
• ELDRS free capability ensuring stable performance in space environments
• Compatible with all forms of logic and suitable for battery-powered applications

Applications

• Transducer amplifiers
• DC gain blocks
• Single power supply systems
• Interface electronics for digital systems

Procurement Notes

Verify the specific radiation qualification level required for your application, as the LM158A MDR series includes variants with different radiation specifications such as ELDRS-free options. Confirm that the ordering suffix matches the exact package type and radiation grade needed. Ensure compliance with MIL-STD-883 standards if mission-critical reliability is required. Check for any specific test conditions or subgroup requirements mandated by your procurement specifications.

Selection Notes

Select this component when designing circuits that require robust performance in harsh environments, including those exposed to radiation. The wide input common-mode voltage range allows direct sensing near ground without additional biasing. Consider the low supply current drain for power-sensitive designs. Verify that the output swing capabilities meet the load requirements, noting that the output can swing close to ground even on a single supply.

Part Context

The LM158A MDR belongs to the LM158QML family of low-power dual operational amplifiers. This family is specifically engineered for military and aerospace applications requiring high reliability. The device integrates two amplifiers into a single package, eliminating the need for dual supplies in many configurations. It serves as a radiation-hardened alternative to standard commercial op-amps, maintaining functionality under extreme thermal and electrical stress conditions.

Replacement Considerations

LM158AH-SMD

FAQ

Can the LM158A MDR operate directly from a standard +5V digital system power supply?

Yes, the LM158A MDR can be directly operated off a standard +5V power supply voltage commonly used in digital systems, providing the necessary interface electronics without requiring additional ±15V power supplies.

What is the input common-mode voltage range for the LM158A MDR?

The input common-mode voltage range includes ground (0 VDC). The upper end of the range is typically V+ minus 1.5V, allowing the inputs to handle signals down to ground potential even when operating from a single positive supply.