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PDF RT2902 Data sheet ( Hoja de datos )
| Número de pieza | RT2902 | |
| Descripción | RobuST low-power quad operational amplifier | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT2902 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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RT2902
RobuST low-power quad operational amplifier
D
SO14
(plastic micropackage)
Pin connections (top view)
Output 1 1
Inverting Input 1 2
Non-inverting Input 1 3
VCC + 4
Non-inverting Input 2 5
Inverting Input 2 6
Output 2 7
-
+
+
-
14 Output 4
- 13 Inverting Input 4
+ 12 Non-invertin g Input 4
11 VCC -
+ 10 Non-invertin g Input 3
- 9 Inverting Input 3
8 Output 3
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
• Intended for use in aerospace and defense
applications:
– Dedicated traceability and part marking
– Approval documents available for
production parts
– Adapted extended life time and
obsolescence management
Datasheet - production data
– Extended product change notification
process
– Designed and manufactured to meet sub
ppm quality goals
– Advanced mold and frame designs for
superior resilience to harsh environments
(acceleration, EMI, thermal, humidity)
– Extended screening capability on request
– Single fabrication, assembly, and test site
– Temperature range (-40 °C to 125 °C)
Applications
• Aerospace and defense
• Harsh environments
Description
This circuit consists of four independent, high gain
operational amplifiers which employ internal
frequency compensation and are specifically
designed for aerospace and defense 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.
October 2014
This is information on a product in full production.
DocID026928 Rev 1
1/16
www.st.com
1 page  
RT2902
2 Schematic diagram
Schematic diagram
Figure 1. Schematic diagram (1/4 RT2902)
DocID026928 Rev 1
5/16
16
5 Page 
RT2902
Typical single-supply applications
4 Typical single-supply applications
Figure 18. AC coupled inverting amplifier
R1
C I 10 kΩ
eI ~
R2
VCC 100 kΩ
Rf
100 kΩ
1/4
RT2902
RB
6.2 kΩ
R3
100 kΩ
Rf
A V = - R1
(a s s hown A V = -10)
Co
e
0
o
RL
10 kΩ
2VPP
C1
10 μF
Figure 19. AC coupled non-inverting amplifier
C1
0. 1 μF
R1
100 kΩ
CI
eI ~
R3
1 MΩ
C2
10 μF
R2
1 MΩ
1/4
RT2902
RB
6.2 kΩ
AV
=
1
+
R2
R1
(a s s hown AV = 11)
Co
e
0
o
RL
10 kΩ
R4
100 kΩ
VCC
R5
100 kΩ
2 V PP
Figure 20. Non-inverting DC gain
10 kΩ
1/4
RT2902
AV = 1 +
R2
R1
(As s hown AV = 101 )
e O +5 V
R1
10 kΩ
R2
1 MΩ
0 e I (mV )
Figure 21. DC summing amplifier
e 1 100 kΩ
e 2 100 kΩ
e 3 100 kΩ
100 kΩ
1/4
RT2902
100 kΩ
e 4 100 kΩ
eo = e1 + e2 - e3 - e4
where (e1 + e2) ≥ (e3 + e4)
to keep eo ≥ 0 V
eO
Figure 22. Active bandpass filter
Figure 23. High input Z adjustable gain DC
instrumentation amplifier
R1
100 kΩ
e1
R3
10 kΩ
1/4
RT2902
R4
10 MΩ
C2
330 pF
R6
470 kΩ
1/4
RT2902
Fo = 1 kHz
Q = 50
Av = 100 (40 dB)
R8
100 kΩ
C1
330 pF
1/4
RT2902
R5
470 kΩ
C3
10 μF
R7
100 kΩ
eO
V CC
R1
100 kΩ
e1
R2
2 kΩ
1/4
RT2902
Ga in adjust
R5
100 kΩ
1/4
RT2902
e2
If R1 = R5 and R3 = R4 = R6 = R7
eo = [ 1 + 2R 1] (e2 - e1)
R2
As sho wn eo = 101 (e2 - e1)
R3
100 kΩ
R6
100 kΩ
R4
100 kΩ
1/4
RT2902
R7
100 kΩ
eO
DocID026928 Rev 1
11/16
16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RT2902.PDF ] | |
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