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LM2902W Folha de dados(PDF) 11 Page - STMicroelectronics

Nome de Peças LM2902W
Descrição Electrónicos  Low-power quad operational amplifier
PDF  20 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LM2902W Folha de dados(HTML) 11 Page - STMicroelectronics

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6
Typical single-supply applications
Figure 23. AC coupled inverting amplifier
Rf
100 kΩ
Cl
R1
10 kΩ
1/4
LM2902
Co
0
2VPP
eo
RL
10 kΩ
el
RB
6.2 kΩ
R3
100 kΩ
R2
100 kΩ
Vcc+
C1
10 µF
~
AV=-
R2
R1
(as shown AV=-10)
Figure 24. AC coupled non-inverting amplifier
1/4
LM2902
~
0
2 VPP
R
10 kΩ
L
Co
eo
R
6.2 kΩ
B
C1
0.1 µF
eI
VCC
(
= 11)
V
A = 1 + R2
R1
V
R1
100 kΩ
R2
1 MΩ
CI
R3
1 MΩ
R4
100 kΩ
R5
100 kΩ
C2
10 µF
as shown A
Figure 25. Non-inverting DC gain
R1
10 kΩ
R2
1 MΩ
1/4
LM2902
10 k
e I
eo
+5 V
(mV)
0
AV =1 +
R2
R1
(as shown A = 101)
V
Ω
Figure 26. DC summing amplifier
eO
e4
e3
e2
e 1
where (e1 + e2) ≥ (e3 + e4)
e0 = e1 + e2 - e3 - e4
to keep e0 ≥ 0 V
100 kΩ
100 kΩ
100 kΩ
100 kΩ
100 kΩ
1/4
LM2902
100 kΩ
Figure 27. Active bandpass filter
R3
10 kΩ
1/4
LM2902
e1
eO
R8
100 kΩ
R7
100kΩ
C3
10µF
VCC
R5
470 kΩ
C2
330 pF
R4
10 MΩ
R6
470 kΩ
R1
100 kΩ
C1
330 pF
1/4
LM2902
1/4
LM2902
Fo = 1 kHz
Q = 50
Av = 100 (40 dB)
Figure 28. High input Z adjustable gain DC
instrumentation amplifier
R3
100 kΩ
eO
R1
100 kΩ
e 1
1/4
LM2902
R7
100 kΩ
R6
100 kΩ
R5
100 kΩ
e 2
R2
2 kΩ
Gain adjust
R4
100 kΩ
1/4
LM2902
1/4
LM2902
If R1 = R5 and R3 = R4 = R6 = R7
As shown eo = 101 (e2 - e1)
R2
eo = [1 + 2R1] (e2 - e1)
LM2902W
Typical single-supply applications
DS3575 - Rev 11
page 11/20



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