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LT311AN8

LT311AN8 Description

The LT311AN8 from Analog Devices Inc. is a general-purpose linear comparator designed for precision applications requiring robust performance. Packaged in an 8-pin DIP (Through Hole) and supplied in a tube, this obsolete but reliable IC operates within a wide voltage range of 5V to 30V (single supply) or ±2.5V to ±15V (dual supply). It features a low input offset voltage (max 1mV @ ±15V) and minimal input bias current (max 0.1µA @ ±15V), ensuring high accuracy in signal comparison. With a quiescent current of 7.5mA (max), it balances power efficiency and speed, making it suitable for both industrial and consumer electronics.

LT311AN8 Features

• Wide Supply Range: Supports single (5V–30V) or dual (±2.5V–±15V) operation for flexibility in design.
• Low Input Offset: 1mV max at ±15V reduces error in precision circuits.
• Minimal Bias Current: 0.1µA max at ±15V minimizes loading effects on signal sources.
• Robust Construction: Through-hole mounting (DIP-8) ensures durability in harsh environments.
• Extended Temperature Range: Operates from 0°C to 70°C, suitable for industrial applications.
• Low Power Consumption: Quiescent current of 7.5mA (max) optimizes energy use.

LT311AN8 Applications

The LT311AN8 excels in precision comparison tasks, including:

• Voltage Monitoring: Detects threshold crossings in power supplies or battery management systems.
• Signal Conditioning: Compares sensor outputs in industrial control systems.
• Window Comparators: Used in safety circuits to ensure signals remain within defined limits.
• Analog-to-Digital Interfaces: Acts as a front-end comparator for ADCs in data acquisition systems.
• Consumer Electronics: Ideal for audio level detection or overvoltage protection in appliances.

Conclusion of LT311AN8

While obsolete, the LT311AN8 remains a dependable choice for engineers needing a high-performance, general-purpose comparator. Its low offset voltage, wide supply range, and robust packaging make it versatile for precision applications in industrial, automotive, and consumer electronics. For legacy systems or designs requiring through-hole reliability, the LT311AN8 offers a proven solution. Consider modern alternatives for new designs, but this IC remains a strong option for maintenance or upgrades.