RT2902 [STMICROELECTRONICS]
RobuST low-power quad operational amplifier;
| 型号： | RT2902 |
| 厂家： | 
ST |
| 描述： | RobuST low-power quad operational amplifier |
| 文件： | 总16页 (文件大小：1367K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT2902
RobuST low-power quad operational amplifier
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)
D
SO14
(plastic micropackage)
Pin connections (top view)
Output 1
Inverting Input 1
1
2
3
4
5
6
7
14 Output 4
13 Inverting Input 4
-
-
Applications
+
+
Non-inverting Input 1
12 Non-inverting Input 4
-
+
V
CC
11
V
CC
• Aerospace and defense
• Harsh environments
Non-inverting Input 2
Inverting Input 2
10 Non-inverting Input 3
+
-
+
-
9
8
Inverting Input 3
Output 3
Output 2
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.
Features
•
•
Wide gain bandwidth: 1.3 MHz
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.
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
October 2014
DocID026928 Rev 1
1/16
This is information on a product in full production.
www.st.com
Contents
RT2902
Contents
1
2
3
4
5
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical single-supply applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1
SO14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6
7
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16
DocID026928 Rev 1
RT2902
Absolute maximum ratings and operating conditions
1
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings (AMR)
Symbol
Parameter
Value
Unit
VCC
Vid
Supply voltage(1)
±16 to 33
32
Differential input voltage(2)
V
Vin
Input voltage
-0.3 to 32
Infinite
150
Output short-circuit duration(3)
Maximum junction temperature
s
Tj
°C
5 in DC or 50 in AC
(duty cycle = 10 %, T = 1 s)
Input current(4): Vin driven negative
Iin
mA
Input current(5): Vin driven positive above
AMR value
0.4
Tstg
Rthja
Rthjc
Storage temperature range
-65 to 150
105
°C
Thermal resistance junction to ambient(6)
Thermal resistance junction to case(6)
HBM: human body model(7)
°C/W
31
370
ESD
MM: machine model(8)
150
V
CDM: charged device model(9)
1500
1. All voltage values, except the differential voltage are with respect to network ground terminal.
2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal.
3. Short-circuit from the output to VCC+ can cause excessive heating and eventu+al destruction. The maximum
output current is approximately 20 mA, independent of the magnitude of VCC
.
4. This input current only exists when the voltage at any of the input leads is driven negative. It is due to the
collector-base junction of the input PNP transistor becoming forward-biased and thereby acting as an input
diode clamp. In addition to this diode action, there is an NPN parasitic action on the IC chip. This transistor
action can cause the output voltages of the op amp to go to the VCC voltage level (or to ground for a large
overdrive) for the time during which an input is driven negative. This is not destructive and normal output is
restored for input voltages above -0.3 V.
5. The junction base/substrate of the input PNP transistor polarized in reverse must be protected by a resistor
in series with the inputs to limit the input current to 400 µA max (R = (Vin - 36 V)/400 µA).
6. Rthja/c are typical values
7. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
8. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating.
9. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
DocID026928 Rev 1
3/16
16
Absolute maximum ratings and operating conditions
RT2902
Unit
Table 2. Operating conditions
Parameter
Symbol
Value
VCC
Supply voltage
3 to 30
Common mode input voltage range
Tmin ≤ Tamb ≤ Tmax
(VCC+) - 1.5
(VCC+) - 2
-40 to 125
V
Vicm
Toper
Operating free-air temperature range
°C
4/16
DocID026928 Rev 1
RT2902
Schematic diagram
2
Schematic diagram
Figure 1. Schematic diagram (1/4 RT2902)
DocID026928 Rev 1
5/16
16
Electrical characteristics
RT2902
3
Electrical characteristics
+
-
Table 3. V
= 5 V, V
= ground, V = 1.4 V, T = 25 °C
amb
CC
CC
o
(unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Input offset voltage(1)
Input offset voltage(1), Tmin ≤ Tamb ≤ Tmax
2
7
Vio
mV
µV/°C
nA
9
ΔVio/ΔT Input offset voltage drift
7
2
30
Input offset current
Iio
30
Input offset current, Tmin ≤ Tamb ≤ Tmax
40
DIio
Iib
Input offset current drift
10
20
200
150
300
pA/°C
nA
Input bias current(2)
Input bias current(2), Tmin ≤ Tamb ≤ Tmax
Large signal voltage gain
50
25
100
110
(VCC+ = 15 V, RL = 2 kΩ, Vo = 1.4 V to 11.4 V)
Avd
V/mV
dB
Large signal voltage gain
(VCC+ = 15 V, RL = 2 kΩ, Vo = 1.4 V to 11.4 V),
Tmin ≤ Tamb ≤ Tmax
Supply voltage rejection ratio (RS ≤10 kΩ)
65
65
SVR
Supply voltage rejection ratio (RS ≤10 kΩ) ,
Tmin ≤ Tamb ≤ Tmax
Supply current, all amps, no load
VCC+ = 5 V
0.7
1.5
1.2
3
VCC+ = 30 V
Icc
mA
Tmin ≤ Tamb ≤ Tmax
VCC+ = 5 V
0.8
1.5
1.2
3
VCC+ = 30 V
Common-mode rejection ratio (RS ≤ 10 kΩ)
70
60
80
CMR
dB
Common-mode rejection ratio (RS ≤ 10 kΩ),
Tmin ≤ Tamb ≤ Tmax
Output short-circuit current
IO
20
40
70
mA
(Vid = 1 V, VCC+ = 15 V, Vo = 2 V)
Output sink current (Vid = -1 V)
VCC+ = 15 V, Vo = 2 V
10
12
20
50
Isink
mA
µA
VCC+ = 15 V, Vo = 0.2 V
High level output voltage (VCC+ = 30 V)
RL = 2 kΩ
Tmin ≤ Tamb ≤ Tmax
RL = 10 kΩ
Tmin ≤ Tamb ≤ Tmax
VCC+ = 5 V, RL = 2 kΩ
Tmin ≤ Tamb ≤ Tmax
26
26
27
27
3
27
28
VOH
V
3.5
6/16
DocID026928 Rev 1
RT2902
Electrical characteristics
+
-
Table 3. V
= 5 V, V
= ground, V = 1.4 V, T = 25 °C
amb
CC
CC
o
(unless otherwise specified) (continued)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Low level output voltage (RL = 10 kΩ)
5
20
VOL
mV
Low level output voltage (RL = 10 kΩ),
Tmin ≤ Tamb ≤ Tmax
20
Slew rate
SR
GBP
THD
en
(VCC+ = 15 V, Vin = 0.5 to 3 V, RL = 2 kΩ,
CL = 100 pF, unity gain)
0.4
1.3
V/µs
MHz
%
Gain bandwidth product
(VCC+ = 30 V, Vin = 10 mV, RL = 2 kΩ, CL = 100 pF)
Total harmonic distortion
(f = 1 kHz, AV = 20 dB, RL = 2 kΩ, Vo = 2 Vpp
,
0.015
CL = 100 pF, VCC+ = 30 V)
Equivalent input noise voltage
nV
40
-----------
(f = 1 kHz, RS = 100 Ω, VCC+ = 30 V)
Hz
Channel separation(3)
(1 kHz ≤ f ≤ 20 kHz)
VO1/VO2
120
dB
1. VO = 1.4 V, RS = 0 Ω, 5 V < VCC+ < 30 V, 0 V < Vic < (VCC+) - 1.5 V.
2. The direction of the input current is out of the IC. This current is essentially constant, independent of the
state of the output, so there is no change in the loading charge on the input lines.
3. Due to the proximity of external components ensure stray capacitance does not cause coupling between
these external parts. This typically can be detected as this type of capacitance increases at higher
frequencies.
DocID026928 Rev 1
7/16
16
Electrical characteristics
RT2902
Figure 2. Input bias current vs. T
Figure 3. Input voltage range
amb
Figure 4. Current limiting
Figure 5. Supply current
Figure 6. Gain bandwidth product
Figure 7. Voltage follower pulse response
4
R L 2 kΩ
VCC = +15V
3
2
1
0
3
2
1
0
10
20
30
40
μ
TIME ( s)
8/16
DocID026928 Rev 1
RT2902
Electrical characteristics
Figure 8. Common mode rejection ratio
Figure 9. Output characteristics (sink)
120
100
80
+7.5V
100k
Ω
Ω
Ω
100
100
60
40
-
e
O
e
I
+
100k
Ω
20
0
+7.5V
1M
10K
100K
100
1K
FR E QUE NCY (Hz)
Figure 10. Open-loop frequency response
Figure 11. Voltage follower pulse response
500
140
Ω
10M
μ
F
0.1
120
100
+
450
V
-
CC
e
O
V
V
O
I
e
-
l
50pF
V
/2
CC
CC
+
400
350
300
250
80
60
40
V
= 30V &
Input
T
+125°C
-55°C
amb
Output
20
0
V
= +10 to + 15V &
CC
T
V
= +25°C
= 30 V
T
+125°C
-55°C
amb
amb
CC
1.0 10
100
1k
10k 100k 1M 10M
0
1
2
3
4
5
6
7
8
FR E QUE NCY (Hz)
TIME ( s)
μ
Figure 12. Large signal frequency response
Figure 13. Output characteristics (source)
20
Ω
100k
Ω
1k
+15V
-
VO
V
15
10
I
Ω
2k
+
+7V
5
0
1k
10k
100k
1M
FR E QUE NCY (Hz)
DocID026928 Rev 1
9/16
16
Electrical characteristics
RT2902
Figure 14. Input current
Figure 15. Voltage gain
160
R L = 20k
Ω
120
80
R L = 2k
Ω
40
0
10
20
30
POSITIVE SUPPLY VOLTAGE (V)
Figure 16. Power supply and common mode
rejection ratio
Figure 17. Large signal voltage gain
10/16
DocID026928 Rev 1
RT2902
Typical single-supply applications
4
Typical single-supply applications
Figure 18. AC coupled inverting amplifier
Figure 19. AC coupled non-inverting amplifier
R f
R1
R2
100 k
Ω
R
f
100 k
Ω
1 MΩ
R2
R1
A
= -
A
= 1 +
V
V
R1
R1
10 kΩ
(as s hown A = -10)
(as s hown A = 11)
V
V
C1
0.1 μF
C I
Co
Co
1/4
RT2902
1/4
RT2902
2VPP
2 V PP
0
0
eo
C I
eo
R
B
R
L
10 kΩ
R
R
B
L
6.2 kΩ
R3
100 k
6.2 k
Ω
10 kΩ
eI
~
R2
100 k
R3
1 MΩ
Ω
Ω
eI
VCC
~
R4
100 k
Ω
VCC
C1
10 μF
C2
10 μF
R5
100 kΩ
Figure 20. Non-inverting DC gain
Figure 21. DC summing amplifier
e 1 100 k
Ω
R2
AV = 1 +
R1
10 k
Ω
A
(As s hown
= 101)
V
eO
1/4
RT2902
+5 V
eO
1/4
RT2902
100 k
Ω
e2
e3
100 k
100 k
Ω
Ω
R2
1 MΩ
100 k
Ω
R1
10 k
Ω
e4
100 k
Ω
eo = e1 + e2 - e3 - e4
where (e1 + e2) ≥ (e3 + e4)
to keep eo ≥ 0 V
0
e I
(mV )
Figure 22. Active bandpass filter
Figure 23. High input Z adjustable gain DC
instrumentation amplifier
R1
100 k
R1
100 k
Ω
Ω
C1
330 pF
R3
100 k
R4
100 kΩ
Ω
1/4
RT2902
1/4
RT2902
R5
470 kΩ
e 1
e1
R4
10 M
eO
Ω
1/4
RT2902
1/4
RT2902
Ga in adjust
R2
2 k
C2
330 pF
Ω
R5
100 k
Ω
R3
10 k
R6
Ω
470 kΩ
eO
R6
100 k
R7
100 kΩ
1/4
RT2902
Ω
R7
1/4
RT2902
100 kΩ
VCC
e 2
C3
10 μF
R8
100 k
Ω
If R1 = R5 and R3 = R4 = R6 = R7
2R 1
Fo = 1 kHz
Q = 50
eo = [ 1 +
] (e2 - e1)
R2
As sho wn eo = 101 (e2 - e1)
Av = 100 (40 dB)
DocID026928 Rev 1
11/16
16
Typical single-supply applications
RT2902
Figure 24. High input Z, DC differential amplifier
Figure 25. Low drift peak detector
I
B
R4
100 k
R2
100 k
1/4
RT2902
eo
Ω
Ω
I
B
1/4
R1
100 k
RT2902
Zo
Ω
C
*
2I
B
e I
R3
100 k
1 μF
Ω
1/4
RT2902
Z I
2N 929
1/4
RT2902
0.001 μF
V
o
+V1
+V2
I
2I
B
B
R
1 M
1/4
RT2902
3R
R4
] (e2 - e1)
Ω
3 M
Ω
eo = [ 1 +
R3
As sho wn eo = (e2 - e1)
Input current
compensatio n
I
B
* Polycarbonat e or polyethylene
Figure 26. Using symmetrical amplifiers to reduce input current (general concept)
1/4
RT2902
eo
I
I
B
I
e I
I
I
B
2N 929
0.001 μF
I
B
B
1/4
RT2902
3 MΩ
Aux. amplifier for input
current compensatio n
I
B
1.5 MΩ
12/16
DocID026928 Rev 1
RT2902
Package information
5
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
®
®
ECOPACK packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
®
ECOPACK is an ST trademark.
DocID026928 Rev 1
13/16
16
Package information
RT2902
5.1
SO14 package information
Figure 27. SO14 package mechanical drawing
Table 4. SO14 package mechanical data
Dimensions
Millimeters
Typ.
Inches
Ref.
Min.
Max.
Min.
Typ.
Max.
A
A1
A2
B
1.35
0.10
1.10
0.33
0.19
8.55
3.80
1.75
0.25
1.65
0.51
0.25
8.75
4.0
0.05
0.004
0.04
0.068
0.009
0.06
0.01
0.02
C
0.007
0.33
0.009
0.34
D
E
0.15
0.15
e
1.27
0.05
H
5.80
0.25
0.40
6.20
0.50
1.27
0.22
0.009
0.015
0.24
0.02
0.05
h
L
k
8° (max.)
ddd
0.10
0.004
14/16
DocID026928 Rev 1
RT2902
Ordering information
6
Ordering information
Table 5. Order codes
Order code
Temperature range
Package
Packing
Marking
RT2902YDT
-40 °C to 125 °C
SO14
Tape and reel
R2902Y
7
Revision history
Table 6.
Date
08-Oct-2014
Document revision history
Revision
Changes
1
Initial release
DocID026928 Rev 1
15/16
16
RT2902
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improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
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acknowledgement.
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2014 STMicroelectronics – All rights reserved
16/16
DocID026928 Rev 1
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