LM2902WYPT(2013) 查看數據表（PDF） - STMicroelectronics
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LM2902WYPT Datasheet PDF : 18 Pages
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Typical single-supply applications
4
Typical single-supply applications
LM2902W
Figure 18. AC coupled inverting amplifier
Rf
100 kΩ
R1
CI 10 kΩ
eI ~
R2
VCC 100 kΩ
1/4
LM2902
RB
6.2 kΩ
R3
100 kΩ
Rf
A V = - R1
(as shown AV = -10)
Co
eo0
RL
10 kΩ
2VPP
C1
10 μF
Figure 19. AC coupled non-inverting amplifier
R1
100 kΩ
R2
1 MΩ
C1
0.1 μF
eI ~
CI
R3
1 MΩ
1/4
LM2902
RB
6.2 kΩ
R4
100 kΩ
AV
=
1
+
R2
R1
(as shown AV = 11)
Co
eo0
RL
10 kΩ
2 VPP
C2
10 μF
VCC
R5
100 kΩ
Figure 20. Non-inverting DC gain
10 kΩ
1/4
LM2902
AV = 1 +
R2
R1
(As shown AV = 101)
eO +5 V
R1
10 kΩ
R2
1 MΩ
0
e I (mV)
Figure 22. Active bandpass filter
R1
100 kΩ
e1
R3
10 kΩ
1/4
LM2902
R4
10 MΩ
C2
330 pF
R6
470 kΩ
1/4
LM2902
Fo = 1 kHz
Q = 50
Av = 100 (40 dB)
R8
100 kΩ
C1
330 pF
1/4
LM2902
R5
470 kΩ
C3
10 μF
R7
100 kΩ
eO
VCC
Figure 21. DC summing amplifier
e 1 100 kΩ
100 kΩ
1/4
LM2902
eO
e2 100 kΩ
e3 100 kΩ
100 kΩ
e4 100 kΩ
eo = e1 + e2 - e3 - e4
where (e1 + e2) ≥ (e3 + e4)
to keep eo ≥ 0 V
Figure 23. High input Z adjustable gain DC
instrumentation amplifier
R1
100 kΩ
e1
R2
2 kΩ
1/4
LM2902
Gain adjust
R5
100 kΩ
R3
100 kΩ
R4
100 kΩ
1/4
eO
LM2902
1/4
LM2902
R6
100 kΩ
e2
If R1 = R5 and R3 = R4 = R6 = R7
eo = [ 1 + 2R1 ] (e2 - e1)
R2
As shown eo = 101 (e2 - e1)
R7
100 kΩ
10/18
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