General Description
The single MAX4091, dual MAX4092, and quad
MAX4094 operational amplifiers combine excellent DC
accuracy with Rail-to-Rail
operation at the input and
output. Since the common-mode voltage extends from
V
CC
to V
EE
, the devices can operate from either a sin-
gle supply (2.7V to 6V) or split supplies (1.35V to
3V). Each op amp requires less than 130A of supply
current. Even with this low current, the op amps are
capable of driving a 1k
load, and the input-referred
voltage noise is only 12nV/
Hz. In addition, these op
amps can drive loads in excess of 2000pF.
The precision performance of the MAX4091/MAX4092/
MAX4094 combined with their wide input and output
dynamic range, low-voltage, single-supply operation,
and very low supply current, make them an ideal
choice for battery-operated equipment, industrial, and
data acquisition and control applications. In addition,
the MAX4091 is available in space-saving 5-pin SOT23,
8-pin MAX, and 8-pin SO packages. The MAX4092 is
available in 8-pin MAX and SO packages, and the
MAX4094 is available in 14-pin TSSOP and 14-pin SO
packages.
________________________Applications
Portable Equipment
Battery-Powered Instruments
Data Acquisition and Control
Low-Voltage Signal Conditioning
Features
o Low-Voltage, Single-Supply Operation (2.7V to 6V)
o Beyond-the-RailsTM Inputs
o No Phase Reversal for Overdriven Inputs
o 30V Offset Voltage
o Rail-to-Rail Output Swing with 1k Load
o Unity-Gain Stable with 2000pF Load
o 165A (max) Quiescent Current Per Op Amp
o 500kHz Gain-Bandwidth Product
o High Voltage Gain (115dB)
o High Common-Mode Rejection Ratio (90dB) and
Power-Supply Rejection Ratio (100dB)
o Temperature Range (-40C to +125C)
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
________________________________________________________________ Maxim Integrated Products
1
V
CC
1
OUT
1
2
3
4
8
7
6
5
V
CC
OUT2
IN2-
IN2+
V
EE
IN1+
IN1-
OUT1
MAX/SO
TOP VIEW
1
2
3
4
8
7
6
5
N.C.
V
CC
OUT
N.C.
V
EE
IN+
IN-
N.C.
MAX/SO
5
4
IN-
3
IN+
2
V
EE
SOT23
14
13
12
11
10
9
8
1
2
3
4
5
6
7
OUT4
IN4-
IN4+
V
EE
V
CC
IN1+
IN1-
OUT1
IN3+
IN3-
OUT3
OUT2
IN2-
IN2+
TSSOP/SO
4
MAX4091
MAX4091
MAX4092
MAX4094
Pin Configurations/Functional Diagrams
19-2272; Rev 0; 1/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX4091AUK-T
-40C to +125C
5 SOT23-5
MAX4091ASA
-40C to +125C
8 SO
MAX4091AUA
-40C to +125C
8 MAX
MAX4092ASA
-40C to +125C
8 SO
MAX4092AUA
-40C to +125C
8 MAX
MAX4094AUD
-40C to +125C
14 TSSOP
MAX4094ASD
-40C to +125C
14 SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 6V, V
EE
= GND, V
CM
= 0, V
OUT
= V
CC
/2, T
A
= +25C.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (V
CC
to V
EE
) ....................................................7V
Common-Mode Input Voltage..........(V
CC
+ 0.3V) to (V
EE
- 0.3V)
Differential Input Voltage .........................................(V
CC
- V
EE
)
Input Current (IN+, IN-) ....................................................10mA
Output Short-Circuit Duration
OUT shorted to GND or V
CC
.................................Continuous
Continuous Power Dissipation (T
A
= +70C)
5-Pin SOT23 (derate 7.1mW/C above +70C)...........571mW
8-Pin SO (derate 5.88mW/C above +70C)...............471mW
8-Pin MAX (derate 4.1mW/C above +70C) ............330mW
14-Pin SO (derate 8.33mW/C above +70C).............667mW
14-Pin TSSOP (derate 9.1mW/C above +70C) ........727mW
Operating Temperature Range .........................-40C to +125C
Storage Temperature Range .............................-65C to +150C
Junction Temperature ......................................................+150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Supply Voltage Range
V
CC
Inferred from PSRR test
2.7
6.0
V
V
CC
= 2.7V
115
165
Supply Current
I
CC
V
CM
= V
CC
/2
V
CC
= 5V
130
185
A
Input Offset Voltage
V
OS
V
CM
= V
EE
to V
CC
0.03
1.4
mV
Input Bias Current
I
B
V
CM
= V
EE
to V
CC
20
180
nA
Input Offset Current
I
OS
V
CM
= V
EE
to V
CC
0.2
7
nA
Inp ut C om m on- M od e Rang e
V
CM
Inferred from CMRR test
V
EE
- 0.05
V
CC
+ 0.05
V
Common-Mode Rejection
Ratio
CMRR
(V
EE
- 0.05V)
V
CM
(V
CC
+ 0.05V)
71
90
dB
Power-Supply Rejection
Ratio
PSRR
2.7V
V
CC
6V
86
100
dB
Sourcing
83
105
V
CC
= 2.7V, R
L
= 100k
0.25V
V
OUT
2.45V
Sinking
81
105
Sourcing
91
105
V
CC
= 2.7V, R
L
= 1k
0.5V
V
OUT
2.2V
Sinking
78
90
Sourcing
87
115
V
CC
= 5.0V, R
L
= 100k
0.25V
V
OUT
4.75V
Sinking
83
115
Sourcing
97
110
Large-Signal Voltage Gain
(Note 1)
A
VOL
V
CC
= 5.0V, R
L
= 1k
0.5V
V
OUT
4.5V
Sinking
84
100
dB
R
L
= 100k
15
69
Output Voltage Swing High
(Note 1)
V
OH
|
V
CC
- V
OUT
|
R
L
= 1k
130
210
mV
R
L
= 100k
15
70
Output Voltage Swing Low
(Note 1)
V
OL
|
V
OUT
- V
EE
|
R
L
= 1k
80
220
mV
AC CHARACTERISTICS
Gain-Bandwidth Product
GBWP
R
L
= 100k
, C
L
= 100pF
500
kHz
Phase Margin
M
R
L
= 100k
, C
L
= 100pF
60
d eg r ees
Gain Margin
R
L
= 100k
, C
L
= 100pF
10
dB
Slew Rate
SR
R
L
= 100k
, C
L
= 15pF
0.20
V/s
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.7V to 6V, V
EE
= GND, V
CM
= 0, V
OUT
= V
CC
/2, T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input-Noise Voltage Density
e
N
f = 10kHz
12
nV
/Hz
Input-Noise Current Density
f = 10kHz
1.5
pA
/Hz
Noise Voltage
(0.1Hz to 10Hz)
16
V
RMS
Total Harmonic Distortion
Plus Noise
THD + N
f = 1kHz, R
L
= 10k
, C
L
= 15pF,
A
V
= 1, V
OUT
= 2V
P-P
0.003
%
Capacitive-Load Stability
C
LOAD
A
V
= 1
2000
pF
Settling Time
t
S
To 0.1%, 2V step
12
s
Power-On Time
t
ON
V
CC
= 0 to 3V step, V
IN
= V
CC
/2,
A
V
= 1
2
s
Op-Amp Isolation
f = 1kHz (MAX4092/MAX4094)
125
dB
ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 6V, V
EE
= GND, V
CM
= 0, V
OUT
= V
CC
/2, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values specified at
T
A
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Supply Voltage Range
V
CC
Inferred from PSRR test
2.7
6.0
V
V
CC
= 2.7V
200
Supply Current
I
CC
V
CM
= V
CC
/2
V
CC
= 5V
225
A
Input Offset Voltage
V
OS
V
CM
= V
EE
to V
CC
3.5
mV
Input Offset Voltage Tempco
V
OS
/
T
2
V/C
Input Bias Current
I
B
V
CM
= V
EE
to V
CC
200
nA
Input Offset Current
I
OS
V
CM
= V
EE
to V
CC
20
nA
Input Common-Mode Range
V
CM
Inferred from CMRR test
V
E E
- 0.05
V
C C
+ 0.05
V
Common-Mode Rejection Ratio
CMRR
(V
EE
- 0.05V)
V
CM
(V
CC
+ 0.05V)
62
dB
Power-Supply Rejection Ratio
PSRR
2.7V
V
CC
6V
80
dB
Sourcing
82
V
CC
= 2.7V, R
L
= 100k
0.25V
V
OUT
2.45V
Sinking
80
Sourcing
90
V
CC
= 2.7V, R
L
= 1k
0.5V
V
OUT
2.2V
Sinking
76
Sourcing
86
V
CC
= 5V, R
L
= 100k
0.25V
V
OUT
4.75V
Sinking
82
Sourcing
94
Large-Signal Voltage Gain
(Note 1)
A
VOL
V
CC
= 5V, R
L
= 1k
0.5V
V
OUT
4.5V
Sinking
80
dB
R
L
= 100k
75
Output Voltage Swing High
(Note 1)
V
OH
V
CC
- V
OUT
R
L
= 1k
250
mV
R
L
= 100k
75
Output Voltage Swing Low
(Note 1)
V
OL
V
OUT
- V
EE
R
L
= 1k
250
mV
Note 1: R
L
is connected to V
EE
for A
VOL
sourcing and V
OH
tests. R
L
is connected to V
CC
for A
VOL
sinking and V
OL
tests.
Note 2: All specifications are 100% tested at T
A
= +25C. Specification limits over temperature (T
A
= T
MIN
to T
MAX
) are guaranteed
by design, not production tested.
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
4
_______________________________________________________________________________________
60
-40
0.01
10
10,000
GAIN AND PHASE
vs. FREQUENCY
-20
MAX4091 toc01
FREQUENCY (kHz)
GAIN (dB)
0
20
40
80
0.1
1
100
1000
-180
-120
-60
0
60
120
180
A
V
= 1000
NO LOAD
PHASE (DEGREES)
PHASE
GAIN
60
-40
0.01
10
10,000
GAIN AND PHASE
vs. FREQUENCY
-20
MAX4091 toc02
FREQUENCY (kHz)
GAIN (dB)
0
20
40
80
0.1
1
100
1000
-180
-120
-60
0
60
120
180
C
L
= 470pF
A
V
= 1000
R
L
=
PHASE (DEGREES)
GAIN
PHASE
140
-20
0.01
10
1000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
20
MAX4091 toc03
FREQUENCY (kHz)
PSRR (dB)
60
100
120
0
40
80
0.1
1
100
V
IN
= 2.5V
V
EE
V
CC
100
0
0.01
10
10,000
CHANNEL ISOLATION
vs. FREQUENCY
20
MAX4901 toc04
FREQUENCY (kHz)
CHANNEL SEPARATION (dB)
40
60
80
120
0.1
1
100
1000
V
IN
= 2.5V
140
160
0
-60
-20
60
140
OFFSET VOLTAGE
vs. TEMPERATURE
40
140
MAX4091 toc05
TEMPERATURE (
C)
OFFSET VOLTAGE (
m
V)
20
100
100
80
-40
0
40
80
120
20
60
120
V
CM
= 0
OFFSET VOLTAGE vs.
COMMON-MODE VOLTAGE
MAX4091 toc06
COMMON-MODE VOLTAGE (V)
OFFSET VOLTAGE (
V)
6
5
3
4
1
2
0
-80
-60
-40
-20
0
20
40
60
80
100
-100
-1
7
V
CC
= 2.7V
V
CC
= 6V
50
-60
-20
60
140
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
70
MAX4091 toc07
TEMPERATURE (
C)
CMRR (dB)
20
100
100
90
-40
0
40
80
120
60
80
110
V
CM
= 0 TO 5V
V
CM
= -0.1V TO +5.1V
V
CM
= -0.2V TO +5.2V
V
CM
= -0.3V TO +5.3V
V
CM
= -0.4V TO +5.4V
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE
MAX4091 toc08
COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRENT (nA)
5
4
3
2
1
-20
-15
-10
-5
0
5
10
15
20
25
-25
0
6
V
CC
= 2.7V
V
CC
= 6V
INPUT BIAS CURRENT vs.
TEMPERATURE
MAX4091 toc09
TEMPERATURE (
C)
INPUT BIAS CURRENT (nA)
100
75
-25
0
25
50
-30
-20
-10
0
10
20
30
40
-40
-50
125
V
CM
= V
CC
V
CC
= 2.7V
V
CC
= 6V
V
CM
= 0
V
CC
= 6V
Typical Operating Characteristics
(V
CC
= 5V, V
EE
= 0, T
A
= +25C, unless otherwise noted.)
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(V
CC
= 5V, V
EE
= 0, T
A
= +25C, unless otherwise noted.)
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
MAX4091 toc10
TEMPERATURE (
C)
SUPPLY CURRENT PER AMP (
A)
100
75
25
50
0
-25
20
40
60
80
100
120
140
160
180
200
220
0
-50
125
V
OUT
= V
CM
= V
CC
/2
V
CC
= 5V
V
CC
= 2.7V
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
MAX4091 toc11
SUPPLY VOLTAGE (V)
SUPPLY CURRENT PER AMP (
A)
5
4
2
3
60
80
100
120
140
160
180
200
40
1
6
120
GAIN (dB)
110
MAX4091 toc12
70
200
90
V
CC
- V
OUT
(mV)
500
100
80
60
50
0
100
300
400
600
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
R
L
= 1k
9
R
L
= 10k
9
R
L
= 100k
9
R
L
= 1M
9
V
CC
= 6V
R
L
TO V
EE
120
GAIN (dB)
110
MAX4091 toc13
70
200
90
V
CC
- V
OUT
(mV)
500
100
80
60
50
0
100
300
400
600
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
R
L
= 1k
9
R
L
= 10k
9
R
L
= 100k
9
R
L
= 1M
9
V
CC
= 2.7V
R
L
TO V
EE
120
80
-60
-20
60
140
LARGE-SIGNAL GAIN
vs. TEMPERATURE
90
110
MAX4091 toc14
TEMPERATURE (
C)
LARGE-SIGNAL GAIN (dB)
20
100
100
-40
0
40
80
120
85
95
105
115
R
L
TO V
CC
R
L
TO V
EE
R
L
= 1k
W, 0.5V < V
OUT
< (V
CC
- 0.5V)
V
CC
= 2.7V
V
CC
= 6V
120
GAIN (dB)
110
MAX4091 toc15
60
100
80
V
OUT
(mV)
500
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
100
90
70
50
0
200
300
400
600
R
L
= 1M
9
R
L
= 100k
9
R
L
= 10k
9
R
L
= 1k
9
V
CC
= 6V
R
L
TO V
CC
120
GAIN (dB)
110
MAX4091 toc16
60
100
80
V
OUT
(mV)
500
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
100
90
70
50
0
200
300
400
600
R
L
= 1M
9
R
L
= 100k
9
R
L
= 10k
9
R
L
= 1k
9
V
CC
= 2.7V
R
L
TO V
CC
120
80
-60
-20
60
140
LARGE-SIGNAL GAIN
vs. TEMPERATURE
90
110
MAX4091 toc17
TEMPERATURE (
C)
LARGE-SIGNAL GAIN (dB)
20
100
100
-40
0
40
80
120
85
95
105
115
R
L
TO V
CC
R
L
TO V
EE
R
L
= 100k
W, 0.3V < V
OUT
< (V
CC
- 0.3V)
V
CC
= 2.7V
V
CC
= 6V
100
0
-60
140
MINIMUM OUTPUT VOLTAGE
vs. TEMPERATURE
20
80
MAX4091 toc18
TEMPERATURE (
C)
0
80
60
40
120
140
160
180
200
220
-40 -20
20 40 60
100 120
R
L
TO V
CC
V
CC
= 6V, R
L
= 1k
W
V
CC
= 2.7V, R
L
= 1k
W
V
CC
= 6V, R
L
= 100k
W
V
CC
= 2.7V, R
L
= 100k
W
MINIMUM V
OUT
(nV)
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