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Precision Micropower, OVP, RRIO
Operational Amplifier
ADA4091-2/ADA4091-4
FEATURES
Single-supply operation: 3.0 V to 30 V
Wide input voltage range
Rail-to-rail output swing
Low supply current: 200 μA/amplifier
Wide bandwidth: 1.2 MHz
Slew rate: 0.46 V/μs
Low offset voltage: 250 μV maximum
No phase reversal
Overvoltage protection (OVP)
25 V above/below supply rails at ±5 V
12 V above/below supply rails at ±15 V
PIN CONFIGURATIONS
OUTA
1
–INA
2
+INA
3
–V
4
8
+V
OUTB
+INB
07671-001
07671-101
ADA4091-2
TOP VIEW
(Not to Scale)
7
6
5
–INB
Figure 1. 8-Lead, Narrow-Body SOIC (R-8)
OUTA 1
–INA 2
+INA 3
–V 4
8 +V
ADA4091-2
TOP VIEW
(Not to Scale)
7 OUTB
6 –INB
5 +INB
NOTES
1.
IT IS RECOMMENDED TO CONNECT THE
EXPOSED PAD TO V–.
APPLICATIONS
Industrial process control
Battery-powered instrumentation
Power supply control and protection
Telecommunications
Remote sensors
Low voltage strain gage amplifiers
DAC output amplifiers
Figure 2. 8-Lead LFCSP (CP-8-9)
OUTA
1
–INA
+INA
+V
+INB
–INB
OUTB
2
3
4
5
6
7
14
13
OUTD
–IND
+IND
–V
+INC
–INC
OUTC
ADA4091-4
TOP VIEW
(Not to Scale)
12
11
10
9
8
Figure 3. 14-Lead TSSOP (RU-14)
14 OUTD
15 OUTA
GENERAL DESCRIPTION
16 NC
The ADA4091-2 dual and ADA4091-4 quad are micropower,
single-supply, 1.2 MHz bandwidth amplifiers featuring rail-to-
rail inputs and outputs. They are guaranteed to operate from a
+3.0 V to +30 V single supply as well as from ±1.5 V to ±15 V
dual supplies.
The ADA4091 family features a unique input stage that allows
the input voltage to exceed either supply safely without any phase
reversal or latch-up; this is called overvoltage protection, or OVP.
Applications for these amplifiers include portable telecom-
munications equipment, power supply control and protection,
and interface for transducers with wide output ranges. Sensors
requiring a rail-to-rail input amplifier include Hall effect, piezo-
electric, and resistive transducers.
The ability to swing rail-to-rail at both the input and output enables
designers, for example, to build multistage filters in single-supply
systems and to maintain high signal-to-noise ratios (SNR).
The ADA4091 family is specified over the extended industrial
temperature range of −40°C to +125°C. The ADA4091 family is
part of the growing selection of 36 V, low power op amps from
Analog Devices, Inc., (see Table 1).
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
–INA 1
+INA 2
V+ 3
+INB 4
OUTC 7
OUTB 6
–INC 8
–INB 5
13 NC
12 –IND
ADA4091-4
TOP
VIEW
11 +IND
10 V–
9
+INC
NOTES
1. NC = NO CONNECT.
2. IT IS RECOMMENDED TO CONNECT THE
EXPOSED PAD TO V–.
Figure 4. 16-Lead LFCSP (CP-16-17)
The ADA4091-2 is available in 8-lead, plastic SOIC and 8-lead
LFCSP packages. The ADA4091-4 is available in 14–lead TSSOP
and 16-lead LFCSP surface-mount packages.
Table 1. Low Power, 36 V Operational Amplifiers
Family
Single
Dual
Quad
Rail-to-Rail I/O
ADA4091-2
ADA4091-4
PJFET
AD8682
AD8684
Low Noise
OP1177
OP2177
OP4177
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2010 Analog Devices, Inc. All rights reserved.
07671-103
07571-102
ADA4091-2/ADA4091-4
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configurations ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Specifications ............................................................... 3
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution...................................................................................6
Typical Performance Characteristics ..............................................7
Theory of Operation ...................................................................... 14
Input Stage ................................................................................... 14
Output Stage................................................................................ 14
Input Overvoltage Protection ................................................... 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 18
REVISION HISTORY
10/10—Rev. E. to Rev. F
Changes to Features Section and General Description Section . 1
Changes to Outline Dimensions................................................... 17
5/10—Rev. D. to Rev. E
Changes to Data Sheet Title ............................................................ 1
Changes to Table 2, Input Characteristics, Offset Voltage .......... 3
Changes to Table 3, Input Characteristics, Offset Voltage .......... 4
Changes to Table 4, Input Characteristics, Offset Voltage .......... 5
4/10—Rev. C to Rev. D
Changes to Table 2, Added LFCSP to Input Characteristics ...... 3
Changes to Table 3, Added LFCSP to Input Characteristics ...... 4
Changes to Table 4, Added LFCSP to Input Characteristics ...... 5
10/09—Rev. B to Rev. C
Added 8-Lead LFCSP and 16-Lead LFCSP ..................... Universal
Change to Features Section ............................................................. 1
Updated Outline Dimensions ....................................................... 16
Changes to Ordering Guide .......................................................... 18
7/09—Rev. A to Rev. B
Added New Part ADA4091-4 ........................................... Universal
Changes to Features Section, General Description Section, and
Figure 4 ...............................................................................................1
Added Figure 2, Renumbered Sequentially ...................................1
Changes to Table 1.............................................................................1
Changes to Table 2.............................................................................3
Changes to Table 3.............................................................................4
Changes to Table 4.............................................................................5
Changes to Table 5.............................................................................6
Changes to Table 6.............................................................................6
Updated Outline Dimensions ....................................................... 16
Changes to Ordering Guide .......................................................... 16
7/09—Rev. 0 to Rev. A
Changes to Data Sheet Title .............................................................1
Changes to Features ..........................................................................1
Changes to Table 2.............................................................................3
Changes to Table 3.............................................................................4
Changes to Table 4.............................................................................5
Added Input Current Parameter, Table 5 .......................................6
Added New Figure 12 and Figure 13, Renumbered
Sequentially ........................................................................................8
Added New Figure 24 and Figure 25 ........................................... 10
Added New Figure 36 and Figure 37 ........................................... 12
Added New Figure 43 .................................................................... 13
Changes to Input Overvoltage Protection Section..................... 15
Changes to Ordering Guide .......................................................... 16
10/08—Revision 0: Initial Version
Rev. F | Page 2 of 20
ADA4091-2/ADA4091-4
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
V
SY
= ±1.5 V, V
CM
= 0.0 V, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
ADA4091-4 LFCSP package
−40°C ≤ T
A
≤ +125°C
Offset Voltage Drift
Input Bias Current
∆V
OS
/∆T
I
B
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
Input Offset Current
I
OS
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
CMRR
A
VO
V
CM
= −1.35 V to +1.35 V
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, V
O
= −1.2 V to +1.2 V
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ, V
O
= −1.2 V to +1.2 V
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to GND
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ to GND
−40°C to +125°C
R
L
= 100 kΩ to GND
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ to GND
−40°C ≤ T
A
≤ +125°C
Source/sink
f = 1 MHz, A
V
= 1
V
SY
= 2.7 V to 36 V
−40°C ≤ T
A
≤ +125°C
I
O
= 0 mA
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, C
L
= 30 pF
To 0.01%
Test Conditions/Comments
Min
−250
−400
−600
−55
−55
−275
−3
−5
−75
−1.5
84
78
106
101
92
85
1.490
1.490
1.475
1.455
Typ
−40
−40
2.5
−44
+55
+275
+3
+5
+75
+1.5
Max
+250
+400
+600
Unit
μV
μV
μV
μV/°C
nA
nA
nA
nA
nA
nA
V
dB
dB
dB
dB
dB
dB
V
V
V
V
V
V
V
V
mA
Ω
dB
dB
μA
μA
V/μs
μs
MHz
Degrees
μV p-p
nV/√Hz
0.5
100
113
94
OUTPUT CHARACTERISTICS
Output Voltage High
V
OH
1.495
1.485
−1.499
−1.495
±31
102
−1.495
−1.495
−1.490
−1.490
Output Voltage Low
V
OL
Short-Circuit Limit
Open-Loop Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
I
SC
Z
OUT
PSRR
I
SY
108
100
126
165
200
300
SR
t
S
GBP
Φ
M
e
n
p-p
e
n
0.46
22
1.22
69
0.8
24
0.1 Hz to 10 Hz
f = 1 kHz
Rev. F | Page 3 of 20
ADA4091-2/ADA4091-4
V
SY
= ±5.0 V, V
CM
= 0.0 V, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
V
OS
ADA4091-4 LFCSP package
−40°C ≤ T
A
≤ +125°C
Offset Voltage Drift
Input Bias Current
∆V
OS
/∆T
I
B
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
Input Offset Current
I
OS
−40°C ≤ T
A
≤ +85°C
−40°C ≤ T
A
≤ +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
CMRR
A
VO
V
CM
= −4.85 V to +4.85 V
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, V
O
= ±4.7 V
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ, V
O
= ±4.7 V
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to GND
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ to GND
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ to GND
−40°C ≤ T
A
≤ +125°C
R
L
= 10 kΩ to GND
−40°C ≤ T
A
≤ +125°C
Source/sink
f = 1 MHz, A
V
= 1
V
SY
= 2.7 V to 36 V
−40°C ≤ T
A
≤ +125°C
I
O
= 0 mA
−40°C ≤ T
A
≤ +125°C
R
L
= 100 kΩ, C
L
= 30 pF
To 0.01%
Test Conditions/Comments
Min
−250
−400
−600
−60
−80
−350
−3
−7
−100
−5
95
88
113
106
98
90
4.980
4.980
4.950
4.900
Typ
−45
−40
2.5
−50
+80
+350
+3
+7
+100
+5
Max
+250
+400
+600
Unit
μV
μV
μV
μV/°C
nA
nA
nA
nA
nA
nA
V
dB
dB
dB
dB
dB
dB
V
V
V
V
V
V
V
V
mA
Ω
dB
dB
μA
μA
V/μs
μs
MHz
Degrees
μV p-p
nV/√Hz
0.5
113
117
100
OUTPUT CHARACTERISTICS
Output Voltage High
V
OH
4.990
4.960
−4.998
−4.990
±20
77
−4.990
−4.980
−4.980
−4.975
Output Voltage Low
V
OL
Short-Circuit Limit
Open-Loop Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
I
SC
Z
OUT
PSRR
I
SY
108
100
126
180
225
300
SR
t
S
GBP
Φ
M
e
n
p-p
e
n
0.46
22
1.22
70
0.8
24
0.1 Hz to 10 Hz
f = 1 kHz
Rev. F | Page 4 of 20
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