LM339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LM339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(lái)生成輸出；身份型比較器指示兩個(gè)輸入是否相同，幅度型比較器還指示兩個(gè)輸入不相同時(shí)哪個(gè)較大。它們不同于比較兩個(gè)模擬輸入幅度的器件，后者稱為線性比較器且單獨(dú)分類。

DESCRIPTION

These devices consist of four independent precision voltage comparators with an offset voltage specifications as low as 2mV max for LM339A, LM239A and LM139A. All these comparators were 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.

■ WIDE SINGLE SUPPLY VOLTAGE RANGE OR

DUAL SUPPLIES FOR ALL DEVICES : +2V TO

+36V OR ±1V TO ±18V

■ VERY LOW SUPPLY CURRENT (1.1mA)

INDEPENDENT OF SUPPLY VOLTAGE

(1.4mW/comparator at +5V)

■ LOW INPUT BIAS CURRENT : 25nA TYP

■ LOW INPUT OFFSET CURRENT : ±5nA TYP

■ LOW INPUT OFFSET VOLTAGE : ±1mV TYP

■ INPUT COMMON-MODE VOLTAGE RANGE

INCLUDES GROUND

■ LOW OUTPUT SATURATION VOLTAGE :

250mV TYP. (IO = 4mA)

■ DIFFERENTIAL INPUT VOLTAGE RANGE

EQUAL TO THE SUPPLY VOLTAGE

■ TTL, DTL, ECL, MOS, CMOS COMPATIBLE

OUTPUTS