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________________General Description
The MAX4040MAX4044 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 10A of
supply current per amplifier. The MAX4041/MAX4043
have a low-power shutdown mode that reduces supply
current to less than 1A and forces the output into a
high-impedance state. The combination of low-voltage
operation, rail-to-rail inputs and outputs, and ultra-low
power consumption 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 100k
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
-40C to +85C extended temperature range.
________________________Applications
Battery-Powered Strain
Gauges
Systems
Sensor Amplifiers
Portable/Battery-Powered
Cellular Phones
Electronic Equipment
Notebook Computers
Digital Scales
PDAs
____________________________Features
o
Single-Supply Operation Down to +2.4V
o
Ultra-Low Power Consumption:
10A Supply Current per Amplifier
1A Shutdown Mode (MAX4041/MAX4043)
o
Rail-to-Rail Input Common-Mode Range
o
Outputs Swing Rail-to-Rail
o
No Phase Reversal for Overdriven Inputs
o
200V Input Offset Voltage
o
Unity-Gain Stable for Capacitive Loads up to 200pF
o
90kHz Gain-Bandwidth Product
o
Available in Space-Saving 5-Pin SOT23 and
8-Pin MAX Packages
MAX4040MAX4044
Single/Dual/Quad, Low-Cost, SOT23,
Micropower Rail-to-Rail I/O Op Amps
________________________________________________________________
Maxim Integrated Products
1
V
EE
IN-
IN+
1
5
V
CC
OUT
MAX4040
SOT23-5
TOP VIEW
2
3
4
19-1377; Rev 0; 5/98
PART
MAX4040
EUK-T
MAX4040EUA
MAX4040ESA
-40C to +85C
-40C to +85C
-40C to +85C
TEMP. RANGE
PIN-
PACKAGE
5 SOT23-5
8 MAX
8 SO
Ordering Information
Pin Configurations continued at end of data sheet.
NO. OF
AMPS
PIN-PACKAGE
MAX4040
1
5-pin SOT23,
8-pin MAX/SO
PART
MAX4041
1
8-pin MAX/SO
SHUTDOWN
--
Yes
MAX4044
4
14-pin SO
--
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
MAX4042
EUA
MAX4042ESA
-40C to +85C
-40C to +85C
8 MAX
8 SO
MAX4044
ESD
-40C to +85C
14 SO
SOT
TOP MARK
ACGF
--
--
--
--
--
Pin Configurations
Selector Guide
MAX4042
2
8-pin MAX/SO
--
MAX4043
2
10-pin MAX/
14-pin SO
Yes
MAX4041
ESA
MAX4041EUA
-40C to +85C
-40C to +85C
8 SO
8 MAX
--
--
MAX4043
EUB
MAX4043ESD
-40C to +85C
-40C to +85C
10 MAX
14 SO
--
--
MAX4040MAX4044
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--T
A
= +25C
(V
CC
= +5.0V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, SHDN = V
CC
, R
L
= 100k
tied to V
CC
/ 2, unless otherwise noted.)
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
)..................................................+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
= +70C)
5-Pin SOT23 (derate 7.1mW/C above +70C).............571mW
8-Pin MAX (derate 4.1mW/C above +70C) ..............330mW
8-Pin SO (derate 5.88mW/C above +70C).................471mW
10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW
14-Pin SO (derate 8.33mW/C above +70C)..............667mW
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
14
20
V
CC
= 5.0V
V
EE
V
CM
V
CC
Input Offset Current
I
OS
0.5
3.0
nA
V
EE
V
CM
V
CC
V
IN+
- V
IN-
< 1.0V
Differential Input
Resistance
R
IN(DIFF)
45
M
2.0
5.0
V
IN+
- V
IN-
> 2.5V
SHDN = V
EE
, MAX4041
and MAX4043 only
Large-Signal
Voltage Gain
Shutdown Supply
Current per Amplifier
I
CC(SHDN)
1.0
Supply-Voltage Range
V
CC
2.4
5.5
V
Inferred from PSRR test
Output Voltage
Swing High
4.4
k
V
OH
Inferred from the CMRR test
mV
A
VOL
dB
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Supply Current
per Amplifier
I
CC
10
A
94
V
CC
= 2.4V
10
Specified as
V
CC
- V
OH
Power-Supply
Rejection Ratio
PSRR
dB
(V
EE
+ 0.2V)
V
OUT
(V
CC
- 0.2V)
60
90
74
85
Output Voltage
Swing Low
Input Common-Mode
Voltage Range
R
L
= 100k
R
L
= 25k
R
L
= 100k
R
L
= 25k
A
V
CM
V
EE
V
CC
V
2.4V
V
CC
5.5V
75
85
V
CC
= 2.4V
V
OL
mV
10
Specified as
V
EE
- V
OL
Input Bias Current
I
B
2
10
nA
40
60
R
L
= 100k
R
L
= 25k
Output Short-Circuit
Current
I
OUT(SC)
mA
0.7
Sourcing
2.5
Channel-to-Channel
Isolation
Sinking
dB
CONDITIONS
80
Specified at DC, MAX4042/MAX4043/MAX4044 only
V
CC
= 5.0V
0.20
2.0
V
OS
Input Offset Voltage
mV
0.25
2.5
V
EE
V
CM
V
CC
70
94
dB
CMRR
Common-Mode
Rejection Ratio
MAX404_EU_
All other packages
65
94
V
EE
V
CM
V
CC
MAX4044ESD
MAX404_EU_
All other packages
mV
0.20
1.50
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--T
A
= +25C (continued)
(V
CC
= +5.0V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, SHDN = V
CC
, R
L
= 100k
tied to V
CC
/ 2, unless otherwise noted.)
MAX4040MAX4044
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
Supply Current
per Amplifier
I
CC
28
Supply-Voltage Range
V
CC
2.4
5.5
V
Inferred from PSRR test
V
EE
V
CM
V
CC
Input Offset Current
I
OS
8
nA
Input Voltage Noise Density
e
n
70
nV/
Hz
Input Current Noise Density
i
n
0.05
pA/
Hz
Capacitive-Load Stability
200
pF
Power-Up Time
t
ON
200
s
Input Capacitance
C
IN
3
pF
f = 1kHz
f = 1kHz
A
VCL
= +1V/V, no sustained oscillations
Slew Rate
SR
40
V/ms
Total Harmonic Distortion
THD
0.05
%
Settling Time to 0.01%
t
S
50
s
f
IN
= 1kHz, V
OUT
= 2Vp-p, A
V
= +1V/V
A
V
= +1V/V, V
OUT
= 2V
STEP
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
Gain Margin
G
m
18
dB
Output Leakage Current in
Shutdown
I
OUT(SHDN)
20
100
nA
SHDN = V
EE
= 0, MAX4041/MAX4043 only
(Note 1)
A
6.0
SHDN = V
EE
, MAX4041 and MAX4043 only
Shutdown Supply
Current per Amplifier
I
CC(SHDN)
A
Shutdown Time
t
SHDN
50
s
MAX4041 and MAX4043 only
Enable Time from Shutdown
t
EN
150
s
MAX4041 and MAX4043 only
ELECTRICAL CHARACTERISTICS--T
A
= T
MIN
to T
MAX
(V
CC
= +5.0V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, SHDN = V
CC
, R
L
= 100k
tied to V
CC
/ 2, unless otherwise noted.) (Note 2)
Input Offset Voltage Drift
TC
VOS
2
V/C
V
EE
V
CM
V
CC
Input Bias Current
I
B
20
nA
Phase Margin
m
68
degrees
4.5
SHDN Logic Low
V
IL
0.3 x V
CC
V
MAX4041/MAX4043 only
SHDN Logic High
V
IH
0.7 x V
CC
V
MAX4041/MAX4043 only
SHDN Input Bias Current
I
IH
, I
IL
40
120
nA
MAX4041/MAX4043 only
Gain Bandwidth Product
GBW
90
kHz
5.0
V
OS
Input Offset Voltage
mV
3.5
V
EE
V
CM
V
CC
MAX4044ESA
All other packages
MAX404_EU_
20
0
-60
-40
-20
20
40
100
SUPPLY CURRENT PER AMPLIFIER
vs. TEMPERATURE
6
4
2
16
14
18
MAX4040/44-01
TEMPERATURE (C)
SUPPLY CURRENT (
A)
0
60
10
8
12
80
V
CC
= +5.5V
V
CC
= +2.4V
5
0
-60 -40
-20
0
20
40
100
MAX4041/MAX4043
SHUTDOWN SUPPLY CURRENT
PER AMPLIFIER vs. TEMPERATURE
1
4
MAX4040/44-01.5
TEMPERATURE (C)
SHUTDOWN SUPPLY CURRENT (
A)
60
2
3
80
V
CC
= +5.5V
SHDN = 0
V
CC
= +2.4V
__________________________________________Typical Operating Characteristics
(V
CC
= +5.0V, V
EE
= 0, V
CM
= V
CC
/ 2, SHDN = V
CC
, R
L
= 100k
to V
CC
/ 2, T
A
= +25C, unless otherwise noted.)
MAX4040MAX4044
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
4
_______________________________________________________________________________________
Large-Signal Voltage
Gain
Output Voltage Swing
High
V
OH
Inferred from the CMRR test
mV
A
VOL
dB
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Specified as
V
CC
- V
OH
, R
L
= 25k
Common-Mode
Rejection Ratio
CMRR
dB
(V
EE
+ 0.2V)
V
OUT
(V
CC
- 0.2V), R
L
= 25k
125
68
Output Voltage Swing
Low
Input Common-Mode
Voltage Range
V
CM
V
EE
V
CC
V
60
V
OL
mV
Specified as
V
EE
- V
OL
, R
L
= 25k
75
CONDITIONS
ELECTRICAL CHARACTERISTICS--T
A
= T
MIN
to T
MAX
(continued)
(V
CC
= +5.0V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, SHDN = V
CC
, R
L
= 100k
tied to V
CC
/ 2, unless otherwise noted.) (Note 2)
Note 1:
Tested for V
EE
V
OUT
V
CC
. Does not include current through external feedback network.
Note 2:
All devices are 100% tested at T
A
= +25C. All temperature limits are guaranteed by design.
Power-Supply
Rejection Ratio
PSRR
dB
2.4V
V
CC
5.5V
70
MAX404_EU_
V
EE
V
CM
V
CC
All other packages
65
MAX4040MAX4044
Single/Dual/Quad, Low-Cost, SOT23,
Micropower, Rail-to-Rail I/O Op Amps
_______________________________________________________________________________________
5
120
0
-60
-40
-20
20
40
100
OUTPUT SWING HIGH
vs. TEMPERATURE
20
100
80
MAX4040/44-07
TEMPERATURE (C)
VOLTAGE FROM V
CC
(mV)
0
60
60
40
80
V
CC
= +2.4V, R
L
= 10k
R
L
TO V
EE
V
CC
= +5.5V, R
L
= 20k
V
CC
= +5.5V, R
L
= 100k
V
CC
= +2.4V, R
L
= 100k
120
0
-60
-40
-20
20
40
100
OUTPUT SWING LOW
vs. TEMPERATURE
20
100
80
MAX4040/44-08
TEMPERATURE (C)
VOLTAGE FROM V
EE
(mV)
0
60
60
40
80
V
CC
= +2.4V, R
L
= 10k
V
CC
= +5.5V, R
L
= 20k
V
CC
= +5.5V, R
L
= 100k
V
CC
= +2.4V, R
L
= 100k
R
L
TO V
CC
-80
-100
-60
-40
-20
20
40
100
COMMON-MODE REJECTION
vs. TEMPERATURE
-95
-85
MAX4040/44-09
TEMPERATURE (C)
COMMON-MODE REJECTION (dB)
0
60
-90
80
V
CC
= +2.4V
V
CC
= +5.5V
0
-4
-60
-40
-20
20
40
100
INPUT BIAS CURRENT
vs. TEMPERATURE
-3
-1
MAX4040/44-04
TEMPERATURE (C)
INPUT BIAS CURRENT (nA)
0
60
-2
80
V
CM
= 0
V
CC
= +2.4V
V
CC
= +5.5V
5.0
-5.0
0 0.2
0.6
1.0
1.4
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE (V
CC
= 2.4V)
-2.5
2.5
MAX4040/44-5
V
CM
(V)
I
BIAS
(nA)
0
1.8
2.2
V
CC
= +2.4V
5.0
-5.0
0 0.5
1.5
2.5
3.5
4.5
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE (V
CC
= 5.5V)
-2.5
2.5
MAX4040/44-06
V
CM
(V)
I
BIAS
(nA)
0
5.5
V
CC
= +5.5V
400
0
-60
-40
-20
20
40
100
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
100
300
MAX4040/44-03
TEMPERATURE (C)
INPUT OFFSET VOLTAGE (
V)
0
60
200
80
Typical Operating Characteristics (continued)
(V
CC
= +5.0V, V
EE
= 0, V
CM
= V
CC
/ 2, SHDN = V
CC
, R
L
= 100k
to V
CC
/ 2, T
A
= +25C, unless otherwise noted.)
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