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PDF LM2902 Data sheet ( Hoja de datos )
| Número de pieza | LM2902 | |
| Descripción | LOW POWER QUAD OPERATIONAL AMPLIFIERS | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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LM2902
Low-power quad operational amplifier
Features
■ Wide gain bandwidth: 1.3 MHz
■ Input common-mode voltage range includes
negative rail
■ Large voltage gain: 100 dB
■ Very low supply current per amplifier: 375 µA
■ Low input bias current: 20 nA
■ Low input offset current: 2 nA
■ Wide power supply range:
– Single supply: +3 V to +30 V
– Dual supplies: ±1.5 V to ±15 V
Description
This circuit consists of four independent, high gain
operational amplifiers which employ internal
frequency compensation and are specifically
designed for automotive and industrial control
systems.
The device operates from a single power supply
over a wide range of voltages. Operation from
split power supplies is also possible and the low
power supply current drain is independent from
the power supply voltage magnitude.
Datasheet − production data
N
DIP14
(Plastic package)
D
SO-14
(Plastic micropackage)
P
TSSOP14
(Thin shrink small outline package)
Q4
QFN16 3x3
(Plastic micropackage)
January 2013
This is information on a product in full production.
Doc ID 2469 Rev 7
1/21
www.st.com
21
1 page  
LM2902
3 Operating conditions
Table 2. Operating conditions
Symbol
Parameter
VCC
Vicm
Toper
Supply voltage
Common mode input voltage range
Tmin ≤ Tamb ≤ Tmax
Operating free-air temperature range
Operating conditions
Value
3 to 30
VCC+ - 1.5
VCC+ -2
-40 to +125
Unit
V
°C
Doc ID 2469 Rev 7
5/21
5 Page 
LM2902
Typical single-supply applications
5 Typical single-supply applications
Figure 19. AC coupled inverting amplifier
Figure 20. AC coupled non-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
C1
10 μF
2VPP
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
C2
10 μF
VCC
R5
100 kΩ
2 VPP
Figure 21. Non-inverting DC gain
Figure 22. DC summing amplifier
10 kΩ
1/4
LM2902
AV = 1 +
R2
R1
(As shown AV = 101)
eO +5 V
R1
10 kΩ
R2
1 MΩ
0 eI (mV)
e 1 100 kΩ
e2 100 kΩ
e3 100 kΩ
100 kΩ
1/4
LM2902
100 kΩ
e4 100 kΩ
eo = e1 + e2 - e3 - e4
where (e1 + e2) ≥ (e3 + e4)
to keep eo ≥ 0 V
eO
Figure 23. 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
C3
10 μF
Figure 24. High input Z adjustable gain DC
instrumentation amplifier
R1
100 kΩ
R5
470 kΩ
e1
1/4
LM2902
R3
100 kΩ
R7
100 kΩ
eO
VCC
R2
2 kΩ
Gain adjust
R5
100 kΩ
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)
R4
100 kΩ
1/4
LM2902
R7
100 kΩ
eO
Doc ID 2469 Rev 7
11/21
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet LM2902.PDF ] | |
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