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LMV762MA Datasheet(PDF) 11 Page - Texas Instruments

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Part No. LMV762MA
Description  Low-Voltage, Precision Comparator With Push-Pull Output
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LMV762MA Datasheet(HTML) 11 Page - Texas Instruments

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V
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VREF
VIN
VO
-
+
V
-
V
+
VREF
VIN
VO
-
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V
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LMV761, LMV762, LMV762Q-Q1
www.ti.com
SNOS998I – FEBRUARY 2002 – REVISED OCTOBER 2015
7 Detailed Description
7.1 Overview
The LMV76x family of precision comparators is available in a variety of packages and is ideal for portable and
battery-operated electronics.
To minimize external components, the LMV76x family features a push-pull output stage where the output levels
are power-supply determined. In addition, the LMV761 (single) features an active-low shutdown pin that can be
used to disable the device and reduce the supply current.
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 Basic Comparator
A basic comparator circuit is used to convert analog input signals to digital output signals. The comparator
compares an input voltage (VIN) at the noninverting input to the reference voltage (VREF) at the inverting pin. If
VIN is less than VREF the output (VO) is low (VOL). However, if VIN is greater than VREF, the output voltage (VO) is
high (VOH).
Figure 19. Basic Comparator Without Hysteresis
Figure 20. Basic Comparator
7.3.2 Hysteresis
The basic comparator configuration may oscillate or produce a noisy output if the applied differential input is near
the input offset voltage of the comparator, which tends to occur when the voltage on one input is equal or very
close to the other input voltage. Adding hysteresis can prevent this problem. Hysteresis creates two switching
thresholds (one for the rising input voltage and the other for the falling input voltage). Hysteresis is the voltage
difference between the two switching thresholds. When both inputs are nearly equal, hysteresis causes one input
to effectively move quickly past the other. Thus, moving the input out of the region in which oscillation may occur.
Copyright © 2002–2015, Texas Instruments Incorporated
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Product Folder Links: LMV761 LMV762 LMV762Q-Q1


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