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LM2904WD 数据表(PDF) 9 Page - STMicroelectronics

部件名 LM2904WD
功能描述  Low power dual operational amplifier
PDF  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LM2904WD 数据表(HTML) 9 Page - STMicroelectronics

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LM2904W
Electrical characteristics
9/19
Typical single-supply applications
Figure 18.
AC coupled inverting amplifier
Figure 19.
AC coupled non-inverting amplifier
1/2
LM2904
~
0
2VPP
R
10k
Ω
L
Co
eo
R
6.2k
Ω
B
R
100k
Ω
f
R1
10k
Ω
CI
eI
VCC
R2
100k
Ω
C1
10
μF
R3
100k
Ω
A= -
R
R1
V
f
(as shown A
= -10)
V
1/2
LM2904
~
0
2VPP
R
10k
Ω
L
Co
eo
R
6.2k
Ω
B
C1
0.1μF
eI
V
CC
(as shown A
= 11)
V
A= 1 + R2
R1
V
R1
100k
Ω
R2
1M
Ω
CI
R3
1M
Ω
R4
100k
Ω
R5
100k
Ω
C2
10μF
Figure 20.
Non-inverting DC gain
Figure 21.
DC summing amplifier
R1
10k
Ω
R2
1M
Ω
1/2
LM2904
10k
Ω
e I
e
O
+5V
(mV)
0
AV=1 +
R2
R1
(As shown
= 101)
A
V
1/2
LM2904
e
O
e
4
e
3
e
2
e
1
100k
Ω
100k
Ω
100k
Ω
100k
Ω
100k
Ω
100k
Ω
eo = e1 + e2 - e3 - e4
where (e1 + e2)
(e3 + e4)
to keep eo
0V
≥
≥
Figure 22.
High input Z, DC differential
amplifier
Figure 23.
Using symmetrical amplifiers to
reduce input current
+
1/2
LM2904
R1
100k
Ω
R2
100k
Ω
R4
100k
Ω
R3
100k
Ω
+V2
V1
Vo
1/2
LM2904
If R1 = R5 and R3 = R4 = R6 = R7
eo = [ 1 +
] (e2 - e1)
As shown eo = 101 (e2 - e1)
2R1
R2
I
B
2N 929
0.001
μF
I
B
3M
Ω
I
B
eo
I
I
e I
I
B
I
B
Input current compensation
1.5M
Ω
1/2
LM2904
1/2
LM2904



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