LM111J/883

Overview

The LM111J/883 is a high-performance voltage comparator manufactured by Texas Instruments in the JAN military grade. It features an input bias current of 100 nA maximum and an offset voltage of 3 mV maximum at 25°C. The device operates on a single supply from 5V to ±15V, with a maximum supply voltage of 36V. Key electrical parameters include a propagation delay of 0.2 µs, a differential input voltage range of ±30V, and a maximum output current capability of 50 mA. It supports strobe functionality and offset nulling.

Feature Summary

• Designed for operation across a wide power supply range, compatible with standard ±15V operational amplifier supplies down to single 5V logic levels.
• Features low input bias current significantly lower than comparable devices like the LM106 or LM710, reducing loading effects on source circuits.
• Output stage is capable of driving loads referenced to system ground, positive supply, or negative supply, including direct drive for lamps or relays.
• Includes dedicated pins for offset voltage adjustment and strobe control, allowing for precise signal threshold management.

Applications

• High-speed pulse generation and timing circuits requiring stable threshold detection.
• Logic level translation between analog signals and digital systems such as RTL, DTL, TTL, and MOS families.
• Precision monitoring applications where low input current draw is critical to maintain source integrity.
• Industrial control systems operating under wide temperature ranges and varying supply voltages.

Procurement Notes

Verify that the component is specifically the LM111J/883 variant, which denotes the JAN (Military) grade. Confirm the package type is TO-99 metal can with 8 pins. Ensure documentation matches Texas Instruments specifications for this military-grade part. Check for authenticity markers consistent with defense-grade procurement standards. Validate that the supplier provides traceability for military aerospace components.

Selection Notes

Select this comparator when application requirements demand low input bias current and compatibility with both bipolar and CMOS logic families. It is suitable for designs needing a wide common-mode input voltage range and high output drive capability. Consider this part over faster comparators if cost and power consumption are prioritized over nanosecond-level switching speeds. Ensure the design accommodates the TO-99 package constraints and military environmental ratings.

Part Context

The LM111 series serves as a general-purpose voltage comparator within Texas Instruments' portfolio. The J/883 suffix indicates compliance with MIL-PRF-38534 standards for hybrid microcircuits. This specific variant bridges the gap between older precision comparators and modern high-speed devices, offering robust performance in harsh environments. It shares pinouts with legacy parts like the LM106 but offers improved input characteristics.

Replacement Considerations

• LM111H/883
• LM111QML