Datasheet

LM2902 Typical single-supply applications
Doc ID 2469 Rev 7 11/21
5 Typical single-supply applications
Figure 19. AC coupled inverting amplifier Figure 20. AC coupled non-inverting amplifier
1/4
LM2902
~
0
2V
PP
R
10 kΩ
L
C
o
e
o
R
6.2 kΩ
B
R
100 k
Ω
f
R1
10 kΩ
C
I
e
I
V
CC
R2
100 k
Ω
C1
10 μF
R3
100 k
Ω
A=-
R
R1
V
f
(as shown A = -10)
V
1/4
LM2902
~
0
2 V
PP
R
10 kΩ
L
C
o
e
o
R
6.2 k
Ω
B
C1
0.1 μF
e
I
V
CC
(as shown A = 11)
V
A=1+
R2
R1
V
R1
100 k
Ω
R2
1 M
Ω
C
I
R3
1 MΩ
R4
100 k
Ω
R5
100 k
Ω
C2
10
μF
Figure 21. Non-inverting DC gain Figure 22. DC summing amplifier
R1
10 k
Ω
R2
1 M
Ω
1/4
LM2902
10 k
Ω
e
I
e
O
+5 V
e
O
(V)
(mV)
0
A
V
=1+
R2
R1
(Asshown = 101)
A
V
1/4
LM2902
e
O
e
4
e
3
e
2
e
1
100 k Ω
100 k Ω
100 k Ω
100 k Ω
100 k Ω
100 k Ω
eo = e1 + e2 - e3 - e4
where (e1 + e2) (e3 + e4)
to keep eo 0 V
≥
≥
Figure 23. Active bandpass filter Figure 24. High input Z adjustable gain DC
instrumentation amplifier
R3
10 k
Ω
1/4
LM2902
e
1
e
O
R8
100 k
Ω
R7
100 k
Ω
C3
10 μF
V
CC
R5
470 kΩ
C2
330 pF
R4
10 M
Ω
R6
470 kΩ
R1
100 k
Ω
C1
330 pF
1/4
LM2902
1/4
LM2902
Fo = 1 kHz
Q = 50
Av = 100 (40 dB)
R3
100 k
Ω
e
O
R1
100 k
Ω
e
1
1/4
LM2902
R7
100 k
Ω
R6
100 k
Ω
R5
100 k
Ω
e
2
R2
2 k
Ω
Gain adjust
R4
100 k
Ω
1/4
LM2902
1/4
LM2902
If R1 = R5 and R3 = R4 = R6 = R7
eo = [ 1 + ] (e2 - e1)
As shown eo = 101 (e2 - e1)
2R1
R2