19-1377; Rev 1; 9/05
Single/Dual/Quad, Low-Cost, SOT23,
Micropower Rail-to-Rail I/O Op Amps
________________General Description
The MAX4040–MAX4044 family of micropower op amps
operates from a single +2.4V to +5.5V supply or dual
±1.2V to ±2.75V supplies and have rail-to-rail input and
output capabilities. These amplifiers provide a 90kHz
gain-bandwidth product while using only 10µA of supply
current per amplifier. The MAX4041/MAX4043 have a
low-power shutdown mode that reduces supply current
to less than 1µA and forces the output into a high-imped-
ance state. The combination of low-voltage operation,
rail-to-rail inputs and outputs, and ultra-low power con-
sumption makes these devices ideal for any
portable/battery-powered system.
These amplifiers have outputs that typically swing to
within 10mV of the rails with a 100kΩ load. Rail-to-rail
input and output characteristics allow the full power-
supply voltage to be used for signal range. The combi-
nation of low input offset voltage, low input bias current,
and high open-loop gain makes them suitable for low-
power/low-voltage precision applications.
The MAX4040 is offered in a space-saving 5-pin SOT23
package. All specifications are guaranteed over the
-40°C to +85°C extended temperature range.
____________________________Features
♦
Single-Supply Operation Down to +2.4V
♦
Ultra-Low Power Consumption:
10µA Supply Current per Amplifier
1µA Shutdown Mode (MAX4041/MAX4043)
♦
Rail-to-Rail Input Common-Mode Range
♦
Outputs Swing Rail-to-Rail
♦
No Phase Reversal for Overdriven Inputs
♦
200µV Input Offset Voltage
♦
Unity-Gain Stable for Capacitive Loads up to 200pF
♦
90kHz Gain-Bandwidth Product
♦
Available in Space-Saving 5-Pin SOT23 and
8-Pin µMAX
®
Packages
MAX4040–MAX4044
Ordering Information
PART
MAX4040EUK-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
5 SOT23-5
8 µMAX
8 SO
8 SO
8 µMAX
8 µMAX
8 SO
10 µMAX
14 SO
14 SO
SOT
TOP MARK
ACGF
—
—
—
—
—
—
—
—
—
________________________Applications
Battery-Powered
Systems
Portable/Battery-Powered
Electronic Equipment
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones
Notebook Computers
PDAs
MAX4040EUA
MAX4040ESA
MAX4041ESA
MAX4041EUA
MAX4042EUA
MAX4042ESA
MAX4043EUB
MAX4043ESD
MAX4044ESD
Selector Guide
PART
MAX4040
MAX4041
MAX4042
MAX4043
MAX4044
NO. OF
AMPS
1
1
2
2
4
SHUTDOWN
—
Yes
—
Yes
—
PIN-PACKAGE
5-pin SOT23,
8-pin µMAX/SO
8-pin µMAX/SO
8-pin µMAX/SO
10-pin µMAX/
14-pin SO
14-pin SO
V
EE
2
Pin Configurations
TOP VIEW
OUT
1
5
V
CC
MAX4040
IN+
3
4
IN-
µMAX is a registered trademark of Maxim Integrated Products, Inc.
SOT23-5
Pin Configurations continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
MAX4040–MAX4044
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
to V
EE
)..................................................+6V
All Other Pins ...................................(V
CC
+ 0.3V) to (V
EE
- 0.3V)
Output Short-Circuit Duration to V
CC
or V
EE
..............Continuous
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW
8-Pin µMAX (derate 4.1mW/°C above +70°C) ..............330mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°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.
ELECTRICAL CHARACTERISTICS—T
A
= +25°C
(V
CC
= +5.0V, V
EE
= 0V, V
CM
= 0V, V
OUT
= V
CC
/ 2,
SHDN
= V
CC
, R
L
= 100kΩ tied to V
CC
/ 2, unless otherwise noted.)
PARAMETER
Supply-Voltage Range
Supply Current
per Amplifier
Shutdown Supply
Current per Amplifier
Input Offset Voltage
Input Bias Current
Input Offset Current
Differential Input
Resistance
Input Common-Mode
Voltage Range
Common-Mode
Rejection Ratio
Power-Supply
Rejection Ratio
Large-Signal
Voltage Gain
Output Voltage
Swing High
Output Voltage
Swing Low
Output Short-Circuit
Current
Channel-to-Channel
Isolation
SYMBOL
V
CC
I
CC
I
CC(SHDN)
V
CC
= 2.4V
V
CC
= 5.0V
SHDN
= V
EE
, MAX4041
and MAX4043 only
V
EE
≤
V
CM
≤
V
CC
(Note 1)
(Note 1)
V
IN+
- V
IN-
< 1.0V
V
IN+
- V
IN-
> 2.5V
Inferred from the CMRR test
V
EE
≤
V
CM
≤
V
CC
2.4V
≤
V
CC
≤
5.5V
(V
EE
+ 0.2V)
≤
V
OUT
≤
(V
CC
- 0.2V)
Specified as
V
CC
- V
OH
Specified as
V
EE
- V
OL
Sourcing
Sinking
Specified at DC, MAX4042/MAX4043/MAX4044 only
R
L
= 100kΩ
R
L
= 25kΩ
R
L
= 100kΩ
R
L
= 25kΩ
R
L
= 100kΩ
R
L
= 25kΩ
74
MAX404_EU_
All other packages
V
EE
65
70
75
94
94
85
94
85
10
60
10
40
0.7
2.5
80
60
90
V
CC
= 2.4V
V
CC
= 5.0V
MAX4044ESD
V
OS
I
B
I
OS
R
IN(DIFF)
V
CM
CMRR
PSRR
A
VOL
V
OH
V
OL
I
OUT(SC)
MAX404_EU_
All other packages
CONDITIONS
Inferred from PSRR test
MIN
2.4
10
14
1.0
2.0
±0.20
±0.25
±0.20
±2
±0.5
45
4.4
V
CC
5.0
±2.0
±2.5
±1.50
±10
±3.0
20
TYP
MAX
5.5
UNITS
V
µA
µA
mV
mV
nA
nA
MΩ
kΩ
V
dB
dB
dB
mV
mV
mA
dB
2
_______________________________________________________________________________________
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
ELECTRICAL CHARACTERISTICS—T
A
= +25°C (continued)
(V
CC
= +5.0V, V
EE
= 0V, V
CM
= 0V, V
OUT
= V
CC
/ 2,
SHDN
= V
CC
, R
L
= 100kΩ tied to V
CC
/ 2, unless otherwise noted.)
PARAMETER
Output Leakage Current in
Shutdown
SHDN
Logic Low
SHDN
Logic High
SHDN
Input Bias Current
Gain Bandwidth Product
Phase Margin
Gain Margin
Slew Rate
Input Voltage Noise Density
Input Current Noise Density
Capacitive-Load Stability
Power-Up Time
Shutdown Time
Enable Time from Shutdown
Input Capacitance
Total Harmonic Distortion
Settling Time to 0.01%
t
ON
t
SHDN
t
EN
C
IN
THD
t
S
f
IN
= 1kHz, V
OUT
= 2Vp-p, A
V
= +1V/V
A
V
= +1V/V, V
OUT
= 2V
STEP
MAX4041 and MAX4043 only
MAX4041 and MAX4043 only
SYMBOL
I
OUT(SHDN)
V
IL
V
IH
I
IH
, I
IL
GBW
Φ
m
G
m
SR
e
n
i
n
f = 1kHz
f = 1kHz
A
VCL
= +1V/V, no sustained oscillations
CONDITIONS
SHDN
= V
EE
= 0, MAX4041/MAX4043 only
(Note 2)
MAX4041/MAX4043 only
MAX4041/MAX4043 only
MAX4041/MAX4043 only
0.7 x V
CC
40
90
68
18
40
70
0.05
200
200
50
150
3
0.05
50
120
MIN
TYP
20
MAX
100
0.3 x V
CC
UNITS
nA
V
V
nA
kHz
degrees
dB
V/ms
nV/√Hz
pA/√Hz
pF
µs
µs
µs
pF
%
µs
MAX4040–MAX4044
ELECTRICAL CHARACTERISTICS—T
A
= T
MIN
to T
MAX
(V
CC
= +5.0V, V
EE
= 0V, V
CM
= 0V, V
OUT
= V
CC
/ 2,
SHDN
= V
CC
, R
L
= 100kΩ tied to V
CC
/ 2, unless otherwise noted.) (Note 3)
PARAMETER
Supply-Voltage Range
Supply Current
per Amplifier
Shutdown Supply
Current per Amplifier
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
SYMBOL
V
CC
I
CC
I
CC(SHDN)
SHDN
= V
EE
, MAX4041 and MAX4043 only
MAX4044ESA
V
OS
TC
VOS
I
B
I
OS
(Note 1)
(Note 1)
V
EE
≤
V
CM
≤
V
CC
MAX404_EU_
All other packages
2
±20
±8
CONDITIONS
Inferred from PSRR test
MIN
2.4
TYP
MAX
5.5
28
6.0
±4.5
±5.0
±3.5
µV/°C
nA
nA
mV
UNITS
V
µA
µA
_______________________________________________________________________________________
3
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
MAX4040–MAX4044
ELECTRICAL CHARACTERISTICS—T
A
= T
MIN
to T
MAX
(continued)
(V
CC
= +5.0V, V
EE
= 0V, V
CM
= 0V, V
OUT
= V
CC
/ 2,
SHDN
= V
CC
, R
L
= 100kΩ tied to V
CC
/ 2, unless otherwise noted.) (Note 3)
PARAMETER
Input Common-Mode
Voltage Range
Common-Mode
Rejection Ratio
Power-Supply
Rejection Ratio
Large-Signal Voltage
Gain
Output Voltage Swing
High
Output Voltage Swing
Low
SYMBOL
V
CM
CMRR
PSRR
A
VOL
V
OH
V
OL
CONDITIONS
Inferred from the CMRR test
V
EE
≤
V
CM
≤
V
CC
2.4V
≤
V
CC
≤
5.5V
(V
EE
+ 0.2V)
≤
V
OUT
≤
(V
CC
- 0.2V), R
L
= 25kΩ
Specified as
V
CC
- V
OH
,
R
L
= 25kΩ
Specified as
V
EE
- V
OL
,
R
L
= 25kΩ
MAX404_EU_
All other packages
MIN
V
EE
60
65
70
68
125
75
TYP
MAX
V
CC
UNITS
V
dB
dB
dB
mV
mV
Note 1:
Input bias current and input offset current are tested with V
CC
= +5.0V and +0.5V
≤
V
CM
≤
+4.5V.
Note 2:
Tested for V
EE
≤
V
OUT
≤
V
CC
. Does not include current through external feedback network.
Note 3:
All devices are 100% tested at T
A
= +25°C. All temperature limits are guaranteed by design.
__________________________________________Typical Operating Characteristics
(V
CC
= +5.0V, V
EE
= 0, V
CM
= V
CC
/ 2,
SHDN
= V
CC
, R
L
= 100kΩ to V
CC
/ 2, T
A
= +25°C, unless otherwise noted.)
MAX4041/MAX4043
SHUTDOWN SUPPLY CURRENT
PER AMPLIFIER vs. TEMPERATURE
MAX4040/44-01
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
20
18
16
SUPPLY CURRENT (µA)
14
12
10
8
6
4
2
0
-60
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
0
V
CC
= +2.4V
V
CC
= +5.5V
5
SHUTDOWN SUPPLY CURRENT (µA)
SHDN = 0
4
3
V
CC
= +5.5V
2
V
CC
= +2.4V
1
-60 -40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
4
_______________________________________________________________________________________
MAX4040/44-01.5
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
MAX4040–MAX4044
Typical Operating Characteristics (continued)
(V
CC
= +5.0V, V
EE
= 0, V
CM
= V
CC
/ 2,
SHDN
= V
CC
, R
L
= 100kΩ to V
CC
/ 2, T
A
= +25°C, unless otherwise noted.)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX4040/44-03
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX4040/44-04
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE (V
CC
= 2.4V)
V
CC
= +2.4V
MAX4040/44-5
400
0
V
CM
= 0
V
CC
= +2.4V
INPUT BIAS CURRENT (nA)
-1
5.0
INPUT OFFSET VOLTAGE (µV)
300
2.5
I
BIAS
(nA)
200
-2
V
CC
= +5.5V
0
100
-3
-2.5
0
-60
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
-4
-60
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
-5.0
0 0.2
0.6
1.0
V
CM
(V)
1.4
1.8
2.2
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE (V
CC
= 5.5V)
MAX4040/44-06
OUTPUT SWING HIGH
vs. TEMPERATURE
R
L
TO V
EE
100
VOLTAGE FROM V
CC
(mV)
80
60
40
20
V
CC
= +5.5V, R
L
= 100kΩ
V
CC
= +2.4V, R
L
= 100kΩ
-60
-40
-20
0
20
40
60
80
100
V
CC
= +2.4V, R
L
= 10kΩ
MAX4040/44-07
5.0
V
CC
= +5.5V
2.5
I
BIAS
(nA)
120
0
V
CC
= +5.5V, R
L
= 20kΩ
-2.5
-5.0
0 0.5
1.5
2.5
V
CM
(V)
3.5
4.5
5.5
0
TEMPERATURE (°C)
OUTPUT SWING LOW
vs. TEMPERATURE
R
L
TO V
CC
100
VOLTAGE FROM V
EE
(mV)
80
60
V
CC
= +5.5V, R
L
= 20kΩ
40
V
CC
= +2.4V, R
L
= 10kΩ
20
0
-60
V
CC
= +5.5V, R
L
= 100kΩ
V
CC
= +2.4V, R
L
= 100kΩ
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
MAX4040/44-08
COMMON-MODE REJECTION
vs. TEMPERATURE
MAX4040/44-09
120
-80
COMMON-MODE REJECTION (dB)
-85
-90
V
CC
= +2.4V
-95
V
CC
= +5.5V
-100
-60
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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