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LMV321M7/NOPB 데이터시트(PDF) 31 Page - Texas Instruments

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부품명 LMV321M7/NOPB
상세설명  Operational Amplifiers
PDF  52 Pages
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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LMV321M7/NOPB 데이터시트(HTML) 31 Page - Texas Instruments

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LMV321-N, LMV321-N-Q1, LMV358-N
LMV358-N-Q1, LMV324-N, LMV324-N-Q1
www.ti.com
SNOS012J – AUGUST 2000 – REVISED DECEMBER 2014
Typical Applications (continued)
Figure 69. Power Amplifier
9.2.10 LED Driver
The LMV321-N/LMV358-N/LMV324-N can be used to drive an LED as shown in Figure 70.
Figure 70. LED Driver
9.2.11 Comparator With Hysteresis
The LMV321-N/LMV358-N/LMV324-N can be used as a low power comparator. Figure 71 shows a comparator
with hysteresis. The hysteresis is determined by the ratio of the two resistors.
VTH+ = VREF/(1+R 1/R2)+VOH/(1+R2/R1)
(30)
VTH− = VREF/(1+R 1/R2)+VOL/(1+R2/R1)
(31)
VH = (VOH−VOL)/(1+R 2/R1)
(32)
where
VTH+: Positive Threshold Voltage
VTH−: Negative Threshold Voltage
VOH: Output Voltage at High
VOL: Output Voltage at Low
VH: Hysteresis Voltage
Since LMV321-N/LMV358-N/LMV324-N have rail-to-rail output, the (VOH−VOL) is equal to VS, which is the supply
voltage.
VH = VS/(1+R2/R1)
(33)
The differential voltage at the input of the op amp should not exceed the specified absolute maximum ratings.
For
real
comparators
that
are
much
faster,
we
recommend
you
use
Texas
Instruments's
LMV331/LMV93/LMV339, which are single, dual and quad general purpose comparators for low voltage
operation.
Copyright © 2000–2014, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Links: LMV321-N LMV321-N-Q1 LMV358-N LMV358-N-Q1 LMV324-N LMV324-N-Q1



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