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LM2903N Datasheet(PDF) 8 Page - STMicroelectronics

Part No. LM2903N
Description  Low-power dual voltage comparator
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LM2903N Datasheet(HTML) 8 Page - STMicroelectronics

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Typical application schematics
LM2903
8/18
Doc ID 2470 Rev 10
Figure 14.
Low frequency op- amp with offset
adjust
Figure 15.
Zero crossing detector
(single power supply)
e
l
~
2N 2222
5 V
e
o
R1
100 k
Ω
1 k
Ω
5 V
1 M
Ω
100 k
Ω
1 M
Ω
Offset adjust
R
S
R
1
15 k
Ω
0.5
μF
R
2
1/ 2
LM2903
100 k
Ω
10 k
Ω
e
l
20 M
Ω
5 V
1N4148
5.1 k
Ω
5.1 k
Ω
100 k
Ω
1/ 2
LM2903
5.1 k
Ω
Figure 16.
Limit comparator
Figure 17.
Split-supply applications - zero
crossing detector
10 k
Ω
e
I
~
R
S
2R
S
V
(ref)
high
V
(ref)
low
2N 2222
V
CC
Lamp
1/ 2
LM2903
1/2
LM2903
2R
S
(12 V)
15 V
5.1 k
Ω
e
o
e
I
~
15 V
1/2
LM2903
Figure 18.
Crystal controlled oscillator
Figure 19.
Comparator with a negative
reference
2 k
Ω
200 k
Ω
e
o
V
CC
0
100 k
Ω
200 k
Ω
1/2
LM2903
0.1
μF
f = 100 kHz
V
CC
= 15 V
15 V
5.1 k
Ω
e
o
e
I
~
15 V
5 V
1/2
LM2903


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