LM2902YD 查看數據表（PDF） - STMicroelectronics
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LM2902YD Datasheet PDF : 16 Pages
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Typical single-supply applications
5
Typical single-supply applications
LM2902
Figure 19. AC coupled inverting amplifier
Figure 20. AC coupled non-inverting amplifier
R1
CI 10kΩ
eI ~
R2
VCC 100kΩ
Rf
100kΩ
1/4
LM2902
RB
6.2kΩ
R3
100kΩ
Rf
A V= - R1
(as shown AV = -10)
Co
eo0
RL
10k Ω
C1
10μF
2VPP
R1
100kΩ
R2
1MΩ
C1
0.1μF
eI ~
CI
R3
1MΩ
1/4
LM2902
RB
6.2kΩ
R4
100kΩ
A
V=
1
+ R2
R1
(as shown A V = 11)
Co
eo0
RL
10kΩ
C2
10μF
VCC
R5
100kΩ
2VPP
Figure 21. Non-inverting DC gain
Figure 22. DC summing amplifier
10kΩ
1/4
LM2902
AV= 1 +
R2
R1
(As shown AV = 101)
eO +5V
e 1 100kΩ
100k Ω
1/4
LM2902
eO
e 2 100kΩ
R1
10kΩ
R2
1M Ω
0
e I (mV)
e 3 100kΩ
100k Ω
e 4 100kΩ
eo = e1 + e2 - e3 - e4
where (e1 + e2) ≥ (e3 + e4)
to keep eo ≥ 0V
Figure 23. Active bandpass filter
R1
100kΩ
e1
R3
10kΩ
1/4
LM2902
R4
10MΩ
C2
330pF
R6
470kΩ
1/4
LM2902
Fo = 1kHz
Q = 50
Av = 100 (40dB)
R8
100kΩ
C1
330pF
1/4
LM2902
R5
470kΩ
R7
100kΩ
C3
10μF
Figure 24. High input Z adjustable gain DC
instrumentation amplifier
R1
100kΩ
e1
R2
2kΩ
1/4
LM2902
Gain adjust
R5
100kΩ
R3
100kΩ
R4
100kΩ
1/4
eO
LM2902
eO
V CC
1/4
LM2902
R6
100kΩ
e2
If R1 = R5 and R3 = R4 = R6 = R7
eo = [ 1 + 2R1 ] (e2 - e1)
R2
As shown eo = 101 (e2 - e1)
R7
100kΩ
10/16
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