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LP311P

TILP311P

Texas Instruments
Comparator Differential Open-Collector, Open-Emitter 8-PDIP
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Overview

The LP311P is a low-power version of the industry-standard LM311 differential comparator, drawing a maximum quiescent current of only 300uA. It features a unique output stage with both open-collector and open-emitter capabilities, allowing it to drive loads referred to ground, Vcc, or a separate logic supply. The device also includes offset balancing and strobe pins to enhance precision and control in sensitive analog circuits.

Why Choose This Part

The LP311P offers high versatility through its flexible output stage which can sink or source up to 25mA. Its low input bias current of 0.1uA makes it suitable for high-impedance signal sources, while the 8-PDIP through-hole package facilitates easy prototyping and repair in industrial environments.

Applications

Battery-Powered Threshold Detectors
Utilizing the low 300uA quiescent current to monitor voltage levels in portable equipment without significant battery drain.
Level Translators
Exploiting the open-collector output to interface between different logic families or high-voltage rails up to 18V.
Zero-Crossing Detectors
Providing accurate timing signals for AC power monitoring or motor synchronization.
Window Comparators
Configuring multiple units to detect if a signal remains within a specific voltage range for industrial instrumentation.

Key Specifications

Type Differential
Output Type Open-Collector, Open-Emitter
Mounting Type Through Hole
Package / Case 8-DIP (0.300", 7.62mm)
Number of Elements 1
Operating Temperature 0degC ~ 70degC
Supplier Device Package 8-PDIP
Current - Quiescent (Max) 300uA
Current - Input Bias (Max) 0.1uA @ +/-15V
Voltage - Input Offset (Max) 7.5mV @ +/-15V
Voltage - Supply, Single/Dual (+/-) 3.5V ~ 30V, +/-1.75V ~ 15V

Getting Started

For initial evaluation, place the 8-PDIP package into a standard breadboard or IC socket and provide a supply voltage between 3V and 18V. Ensure a pull-up resistor is connected to the open-collector output (Pin 7) if interfacing with standard logic, and use the strobe pin (Pin 6) if the output needs to be disabled via external control signals.

Also Consider

LM311P TITexas Instruments - The standard version of this comparator, offering faster response times at the cost of higher power consumption.