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LM612

National Semiconductor
Part Number LM612
Manufacturer National Semiconductor
Description Dual-Channel Comparator and Reference
Published Mar 22, 2005
Detailed Description LM612 Dual-Channel Comparator and Reference February 1995 LM612 Dual-Channel Comparator and Reference General Descript...
Datasheet PDF File LM612 PDF File

LM612
LM612

Overview
LM612 Dual-Channel Comparator and Reference February 1995 LM612 Dual-Channel Comparator and Reference General Description The dual-channel comparator consists of two individual comparators having an input voltage range that extends down to the negative supply voltage V b The common open-collector output can be driven low by either half of the LM612 This configuration makes the LM612 ideal for use as a window comparator The input stages of the comparator have lateral PNP input transistors which maintain low input currents for large differential input voltages and swings above V a The 1 2V voltage reference referred to the Vb terminal is a two-terminal shunt-type band-gap similar to the LM185-1 2 series with voltage accuracy of g 0 6% available The reference features operation over a shunt current range of 17 mA to 20 mA low dynamic impedance and broad capacitive load range As a member of National’s Super-Block TM family the LM612 is a space-saving monolithic alternative to a multichip solution offering a high level of integration without sacrificing performance Features COMPARATORS Y Low operating current Y Wide supply voltage range Y Open-collector outputs Y Input common-mode range Y Wide differential input voltage REFERENCE Y Fixed output voltage Y Tight initial tolerance available Y Wide operating current range Y Tolerant of load capacitance 300 mA 4V to 36V Vb to (V a b 1 8V) g 36V 1 24V g 0 6% (25 C) 17 mA to 20 mA Applications Y Y Y Voltage window comparator Power supply voltage monitor Dual-channel fault monitor Connection Diagram TL H 11058 – 1 Top View Ordering Information For information about surface-mount packaging of this device please contact the Analog Product Marketing group at National Semiconductor Corporation headquarters Temperature Range Military b 55 C s TJ s a 125 C LM612AMN LM612AMJ 883 (Note 13) g 2 0% at 25 C 150 ppm C Max Reference Tolerances g 0 6% at 25 C 80 ppm C Max Industrial b 40 C s TJ a 85 C LM612AIN Package NSC Packag...


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