LM2904A STMicroelectronics, LM2904A Datasheet - Page 11

• Manufacturer Part Number: LM2904A
• Description: Low power, bipolar op-amp
• Manufacturer: STMicroelectronics

Specifications of LM2904A

• Large Dc Voltage Gain: 100 dB
• Wide Bandwidth (unity Gain): 1.1 MHz (temperature compensated)
• Low Input Bias Current: 20 nA (temperature compensated)
• Low Input Offset Current: 2 nA

LM2904, LM2904A
3.1
Figure 18. AC coupled inverting amplifier
Figure 20. Non-inverting DC gain
Figure 22. High input Z, DC differential
+
+V2
e
V1
I
10 kΩ
~
V
R1
C
CC
I
10 k Ω
100 kΩ
If R1 = R5 and R3 = R4 = R6 = R7
eo = [ 1 +
As shown eo = 101 (e2 - e1)
100 kΩ
10 kΩ
R1
10 μF
R1
R2
C1
Typical single-supply applications
amplifier
2R1
R2
LM2904
1 MΩ
LM2904
100 kΩ
R2
100 kΩ
1/2
LM2904
R3
] (e2 - e1)
1/2
6.2 kΩ
100 kΩ
R
1/2
f
R2
R
B
(as shown A = -10)
A = -
100 kΩ
V
e
C
R3
O
o
R1
R
+5V
0
f
e
10 kΩ
o
0
A
R
V
V
L
= 1 + R2
(As shown
LM2904
100 kΩ
e
1/2
I
R4
(mV)
R1
Doc ID 2471 Rev 14
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 μF
C1
1.5 MΩ
e
e
I
~
I
I
I
B
B
100 kΩ
C
10 μF
e
e
e
e
I
1 MΩ
I
R1
1
2
3
4
I
C2
R3
reduce input current
2N 929
100 kΩ
100 kΩ
100 kΩ
100 kΩ
I
B
LM2904
LM2904
eo = e1 + e2 - e3 - e4
where (e1 + e2)
to keep eo
3 MΩ
1/2
1 MΩ
100 kΩ
1/2
6.2 kΩ
100 kΩ
R2
I
R5
I
B
R4
0.001 μF
B
R
B
100 kΩ
V
LM2904
≥
CC
Electrical characteristics
0V
1/2
Input current compensation
(as shown A = 11)
≥
A = 1 + R2
LM2904
C
(e3 + e4)
V
o
1/2
100 kΩ
e
e
o
10 kΩ
R1
o
0
R
V
L
e
O
11/24
2V
PP