lm2904d-dt STMicroelectronics, lm2904d-dt Datasheet - Page 10

• Manufacturer Part Number: lm2904d-dt
• Description: Low Power Dual Operational Amplifier
• Manufacturer: STMicroelectronics

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