LM339QT屬于集成電路（IC）的比較器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的LM339QT比較器邏輯比較器系列產(chǎn)品用于根據(jù)以數(shù)字格式表示的信息比較結(jié)果來生成輸出；身份型比較器指示兩個輸入是否相同，幅度型比較器還指示兩個輸入不相同時哪個較大。它們不同于比較兩個模擬輸入幅度的器件，后者稱為線性比較器且單獨(dú)分類。

特性 Features

? Wide single supply voltage range or dual

supplies for all devices: +2 to +36 V or ±1 V to

±18 V

? Very low supply current (1.1 mA) independent

of supply voltage

? Low input bias current: 25 nA typ

? Low input offset current: ±5 nA typ

? Low input offset voltage: ±1 mV typ

? Input common-mode voltage range includes

ground

? Low output saturation voltage: 250 mV typ;

(ISINK = 4 mA)

? Differential input voltage range equal to the

supply voltage

? TTL, DTL, ECL, MOS, CMOS compatible

outputs

描述 Description

This family of devices consists of four independent precision-voltage comparators with an offset voltage specification as low as 2 mV maximum for LM339A, LM239A, and LM139A. Each comparator has been designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible.

These comparators also have a unique characteristic in that the input common mode voltage range includes ground even though operated from a single power supply voltage.