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LM111H/NOPB

TILM111H/NOPB

Texas Instruments
Comparator Standard (General Purpose) DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL TO-99-8
NRND719 in stock

Overview

The LM111H/NOPB is a high-performance voltage comparator designed to operate over a wide range of supply voltages, from standard 15V op-amp rails down to a single 5V logic supply. It features a unique output stage capable of driving RTL, DTL, TTL, and MOS logic, with the ability to switch voltages up to 50V at currents as high as 50mA. This metal-can version is rated for the full military temperature range of -55C to 125C, making it suitable for high-reliability environments.

Why Choose This Part

The LM111H stands out due to its versatile output flexibility, featuring both an open-collector and an open-emitter that can be referenced to ground or either supply rail. Its low input bias current of 100nA and the ability to operate in harsh thermal environments (-55C to 125C) make it a robust choice for industrial and aerospace instrumentation. The TO-99 metal can package provides superior thermal dissipation and shielding compared to plastic alternatives.

Applications

Zero Crossing Detector
Utilizes the low input offset voltage of 3mV and high sensitivity to accurately detect when an AC signal crosses the reference ground.
Relay and Solenoid Driver
The output stage can sink up to 50mA, allowing it to directly drive small relays or solenoids without an external transistor.
Digital Transmission Isolator
The open-collector/open-emitter flexibility allows for easy level shifting and interfacing between different logic families such as TTL and MOS.
Peak Detector
Used in precision analog circuits to capture and hold the maximum excursion of an input signal waveform.

Key Specifications

Type Standard (General Purpose)
Output Type DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
Mounting Type Through Hole
Package / Case TO-99-8 Metal Can
Number of Elements 1
Operating Temperature -55degC ~ 125degC
Supplier Device Package TO-99-8
Current - Quiescent (Max) 6mA
Current - Input Bias (Max) 0.1uA @ +/-15V
Voltage - Input Offset (Max) 3mV @ +/-15V
Voltage - Supply, Single/Dual (+/-) 5V ~ 36V, +/-2.5V ~ 18V

Getting Started

When designing with the LM111H, ensure proper decoupling of the supply rails and note that the output can be referenced independently of the ground pin for flexible level shifting. Since this is a through-hole TO-99-8 metal can part, it is easily integrated into high-reliability prototypes using standard soldering techniques or TO-99 sockets. Consult the datasheet for wiring configurations to achieve specific logic levels for TTL or MOS compatibility.

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