MAXIM MAX4091, MAX4092, MAX4094 Technical data
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
VCCto VEE, the devices can operate from either a single supply (2.7V to 6V) or split supplies (±1.35V to
±3V). Each op amp requires less than 130µA of supply
current. Even with this low current, the op amps are
capable of driving a 1kΩ 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 µMAX, and 8-pin SO packages. The MAX4092 is
available in 8-pin µMAX 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
♦ Low-Voltage, Single-Supply Operation (2.7V to 6V)
♦ Beyond-the-Rails™ Inputs
♦ No Phase Reversal for Overdriven Inputs
♦ 30µV Offset Voltage
♦ Rail-to-Rail Output Swing with 1kΩ Load
♦ Unity-Gain Stable with 2000pF Load
♦ 165µA (max) Quiescent Current Per Op Amp
♦ 500kHz Gain-Bandwidth Product
♦ High Voltage Gain (115dB)
♦ High Common-Mode Rejection Ratio (90dB) and
Power-Supply Rejection Ratio (100dB)
♦ Temperature Range (-40°C to +125°C)
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
________________________________________________________________ Maxim Integrated Products 1
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
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.
PART TEMP RANGE PIN-PACKAGE
MAX4091AUK-T -40°C to +125°C 5 SOT23-5
MAX4091ASA -40°C to +125°C 8 SO
MAX4091AUA -40°C to +125°C 8 µMAX
MAX4092ASA -40°C to +125°C 8 SO
MAX4092AUA -40°C to +125°C 8 µMAX
MAX4094AUD -40°C to +125°C 14 TSSOP
MAX4094ASD -40°C to +125°C 14 SO
TOP VIEW
N.C.
IN+
V
OUT
1
MAX4091 MAX4092
IN-
2
3
4
EE
µMAX/SO
N.C.
8
V
CC
7
OUT
6
N.C.
5
V
IN+
1
MAX4091
EE
2
3
SOT23
5
4
4
OUT1
V
CC
IN-
IN1-
IN1+
V
1
2
3
4
EE
µMAX/SO
OUT1
1
IN1-
IN1+
V
IN2+
IN2-
OUT2
2
3
CC
4
MAX4094
5
6
7
TSSOP/SO
V
8
CC
OUT2
7
IN2-
6
IN2+
5
OUT4
14
IN4-
13
IN4+
12
V
11
EE
IN3+
10
IN3-
9
OUT3
8
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 6V, VEE= GND, VCM= 0, V
OUT
= VCC/2, TA= +25°C.)
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 (VCCto VEE)....................................................7V
Common-Mode Input Voltage..........(V
CC
+ 0.3V) to (VEE- 0.3V)
Differential Input Voltage .........................................±(V
CC
- VEE)
Input Current (IN+, IN-) ....................................................±10mA
Output Short-Circuit Duration
OUT shorted to GND or V
CC
.................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)...........571mW
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) ............330mW
14-Pin SO (derate 8.33mW/°C above +70°C).............667mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) ........727mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
Supply Voltage Range V
Supply Current I
Input Offset Voltage V
Input Bias Current I
Input Offset Current I
CC
CC
OS
B
OS
Inp ut C om m on- M od e Rang eVCMInferred from CMRR test VEE - 0.05 VCC + 0.05 V
Common-Mode Rejection
Ratio
Power-Supply Rejection
Ratio
Large-Signal Voltage Gain
(Note 1)
Output Voltage Swing High
(Note 1)
Output Voltage Swing Low
(Note 1)
CMRR (V
PSRR 2.7V ≤ V
A
VOL
V
OH
V
OL
AC CHARACTERISTICS
Gain-Bandwidth Product GBWP RL = 100kΩ, CL = 100pF 500 kHz
Phase Margin φ
M
Gain Margin RL = 100kΩ, CL = 100pF 10 dB
Slew Rate SR RL = 100kΩ, CL = 15pF 0.20 V/µs
Inferred from PSRR test 2.7 6.0 V
VCM = VCC/2
VCM = VEE to V
VCM = VEE to V
VCM = VEE to V
- 0.05V) ≤ VCM ≤ (V
EE
CC
VCC = 2.7V, R
0.25V ≤ V
VCC = 2.7V, R
0.5V ≤ V
OUT
VCC = 5.0V, R
0.25V ≤ V
VCC = 5.0V, R
0.5V ≤ V
|V
|V
CC
OUT
- V
- V
OUT
OUT
VCC = 2.7V 115 165
V
CC
CC
CC
CC
≤ 6V 86 100 dB
= 100kΩ
L
≤ 2.45V
OUT
= 1kΩ
L
≤ 2.2V
= 100kΩ
L
≤ 4.75V
OUT
= 1kΩ
L
≤ 4.5V
|
|
EE
RL = 100kΩ, CL = 100pF 60 d eg r ees
= 5V 130 185
0.03 1.4 mV
20 180 nA
0.2 7 nA
+ 0.05V) 71 90 dB
CC
Sourcing 83 105
Sinking 81 105
Sourcing 91 105
Sinking 78 90
Sourcing 87 115
Sinking 83 115
Sourcing 97 110
Sinking 84 100
RL = 100kΩ 15 69
RL = 1kΩ 130 210
RL = 100kΩ 15 70
RL = 1kΩ 80 220
µA
dB
mV
mV
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VCC= 2.7V to 6V, VEE= GND, VCM= 0, V
OUT
= VCC/2, TA= +25°C.)
ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 6V, VEE= GND, VCM= 0, V
OUT
= VCC/2, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values specified at
T
A
= +25°C.) (Note 2)
Note 1: RLis connected to VEEfor A
VOL
sourcing and VOHtests. RLis connected to VCCfor A
VOL
sinking and VOLtests.
Note 2: All specifications are 100% tested at T
A
= +25°C. Specification limits over temperature (TA= T
MIN
to T
MAX
) are guaranteed
by design, not production tested.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input-Noise Voltage Density e
N
Input-Noise Current Density f = 10kHz 1.5 pA/√Hz
Noise Voltage
(0.1Hz to 10Hz)
Total Harmonic Distortion
Plus Noise
Capacitive-Load Stability C
Settling Time t
Power-On Time t
THD + N
LOAD
S
ON
Op-Amp Isolation f = 1kHz (MAX4092/MAX4094) 125 dB
f = 10kHz 12 nV/√Hz
16 µV
f = 1kHz, RL = 10kΩ, CL = 15pF,
A
V
= 1, V
OUT
= 2V
P-P
0.003 %
AV = 1 2000 pF
To 0.1%, 2V step 12 µs
VCC = 0 to 3V step, VIN = VCC/2,
= 1
A
V
2µs
RMS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
Supply Voltage Range V
Supply Current I
Input Offset Voltage V
CC
CC
OS
Input Offset Voltage Tempco ∆VOS/∆T ±2 µV/°C
Input Bias Current I
Input Offset Current I
Input Common-Mode Range V
B
OS
CM
Common-Mode Rejection Ratio CMRR (VEE - 0.05V) ≤ VCM ≤ (V
Power-Supply Rejection Ratio PSRR 2.7V ≤ V
Large-Signal Voltage Gain
(Note 1)
Output Voltage Swing High
(Note 1)
Output Voltage Swing Low
(Note 1)
A
V
V
VOL
OH
OL
Inferred from PSRR test 2.7 6.0 V
VCM = VCC/2
VCM = VEE to V
VCM = VEE to V
VCM = VEE to V
CC
CC
CC
Inferred from CMRR test V
≤ 6V 80 dB
CC
VCC = 2.7V, R
0.25V ≤ V
VCC = 2.7V, R
0.5V ≤ V
VCC = 5V, R
0.25V ≤ V
VCC = 5V, R
0.5V ≤ V
V
- V
CC
V
- V
OUT
OUT
OUT
OUT
EE
OUT
OUT
= 100kΩ
L
≤ 2.45V
= 1kΩ
L
≤ 2.2V
= 100kΩ
L
≤ 4.75V
= 1kΩ
L
≤ 4.5V
VCC = 2.7V 200
V
= 5V 225
CC
±3.5 mV
±200 nA
±20 nA
- 0.05 V
E E
+ 0.05V) 62 dB
CC
+ 0.05 V
C C
Sourcing 82
Sinking 80
Sourcing 90
Sinking 76
Sourcing 86
Sinking 82
Sourcing 94
Sinking 80
RL = 100kΩ 75
RL = 1kΩ 250
RL = 100kΩ 75
RL = 1kΩ 250
µA
dB
mV
mV
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
4 _______________________________________________________________________________________
Typical Operating Characteristics
(VCC= 5V, VEE= 0, TA= +25°C, unless otherwise noted.)
GAIN AND PHASE
80
vs. FREQUENCY
60
40
20
GAIN (dB)
0
-20
-40
0.01 10 10,000
PHASE
0.1 1 100 1000
GAIN
FREQUENCY (kHz)
MAX4091 toc01
AV = 1000
NO LOAD
180
120
60
0
PHASE (DEGREES)
-60
-120
-180
80
60
40
20
GAIN (dB)
0
-20
-40
0.01 10 10,000
CHANNEL ISOLATION
140
120
100
80
60
40
CHANNEL SEPARATION (dB)
20
0
0.01 10 10,000
vs. FREQUENCY
VIN = 2.5V
0.1 1 100 1000
FREQUENCY (kHz)
MAX4901 toc04
160
140
120
V)
m
100
80
60
OFFSET VOLTAGE (
40
20
0
-60 -20 60 140
GAIN AND PHASE
vs. FREQUENCY
CL = 470pF
A
V
R
GAIN
PHASE
0.1 1 100 1000
FREQUENCY (kHz)
L
OFFSET VOLTAGE
vs. TEMPERATURE
-40 0 40 80 120
20 100
TEMPERATURE (°C)
MAX4091 toc02
= 1000
= ∞
VCM = 0
180
120
60
0
PHASE (DEGREES)
-60
-120
-180
MAX4091 toc05
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
140
120
100
80
60
PSRR (dB)
40
20
0
-20
0.01 10 1000
V
CC
V
EE
0.1 1 100
FREQUENCY (kHz)
OFFSET VOLTAGE vs.
COMMON-MODE VOLTAGE
100
80
60
40
VCC = 2.7V
20
0
-20
OFFSET VOLTAGE (µV)
-40
-60
-80
-100
-1 7
COMMON-MODE VOLTAGE (V)
VIN = 2.5V
MAX4091 toc03
MAX4091 toc06
VCC = 6V
653 41 20
COMMON-MODE REJECTION RATIO
vs. TEMPERATURE
110
VCM = 0 TO 5V
100
V
= -0.1V TO +5.1V
CM
90
80
CMRR (dB)
70
VCM = -0.2V TO +5.2V
= -0.3V TO +5.3V
V
CM
60
V
= -0.4V TO +5.4V
CM
50
-60 -20 60 140
-40 0 40 80 120
20 100
TEMPERATURE (°C)
MAX4091 toc07
-10
INPUT BIAS CURRENT (nA)
-15
-20
-25
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE
25
20
15
10
5
0
-5
06
VCC = 6V
VCC = 2.7V
COMMON-MODE VOLTAGE (V)
MAX4091 toc08
54321
40
30
20
10
-10
INPUT BIAS CURRENT (nA)
-20
-30
-40
INPUT BIAS CURRENT vs.
VCM = V
CC
0
VCM = 0
-50 125
TEMPERATURE
VCC = 6V
VCC = 2.7V
VCC = 6V
TEMPERATURE (°C)
MAX4091 toc09
10075-25 0 25 50
MAX4091/MAX4092/MAX4094
Single/Dual/Quad, Micropower, Single-Supply,
Rail-to-Rail Op Amps
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(VCC= 5V, VEE= 0, TA= +25°C, unless otherwise noted.)
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
MAX4091 toc10
TEMPERATURE (°C)
SUPPLY CURRENT PER AMP (µA)
1007525 500-25
20
40
60
80
100
120
140
160
180
200
220
0
-50 125
V
OUT
= VCM = VCC/2
VCC = 5V
VCC = 2.7V
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
MAX4091 toc11
SUPPLY VOLTAGE (V)
SUPPLY CURRENT PER AMP (µA)
542 3
60
80
100
120
140
160
180
200
40
16
120
GAIN (dB)
110
MAX4091 toc12
70
200
90
VCC - V
OUT
(mV)
500
100
80
60
50
0 100 300 400 600
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
RL = 1k
W
RL = 10k
W
RL = 100k
W
RL = 1M
W
VCC = 6V
R
L
TO V
EE
120
GAIN (dB)
110
MAX4091 toc13
70
200
90
VCC - V
OUT
(mV)
500
100
80
60
50
0 100 300 400 600
LARGE-SIGNAL GAIN
vs. OUTPUT VOLTAGE
RL = 1k
W
RL = 10k
W
RL = 100k
W
RL = 1M
W
VCC = 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
RL TO V
CC
RL TO V
EE
RL = 1kW, 0.5V < V
OUT
< (VCC - 0.5V)
VCC = 2.7V
VCC = 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
RL = 1M
W
RL = 100k
W
RL = 10k
W
RL = 1k
W
VCC = 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
RL = 1M
W
R
L
= 100k
W
RL = 10k
W
RL = 1k
W
VCC = 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
RL TO V
CC
RL TO V
EE
RL = 100kW, 0.3V < V
OUT
< (VCC - 0.3V)
VCC = 2.7V
VCC = 6V
100
0
-60 140
MINIMUM OUTPUT VOLTAGE
vs. TEMPERATURE
20
80
MAX4091 toc18
TEMPERATURE (°C)
080
60
40
120
140
160
180
200
220
-40 -20 20 40 60 100 120
RL TO V
CC
VCC = 6V, RL = 1k
W
VCC = 2.7V, RL = 1k
W
VCC = 6V, RL = 100k
W
VCC = 2.7V, RL = 100k
W
MINIMUM V
OUT
(nV)
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