For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
________________General Description
The MAX4240MAX4244 family of micropower op amps
operate from a single +1.8V to +5.5V supply or dual
0.9V to 2.75V supplies and have Beyond-the-RailsTM
inputs and Rail-to-Rail
output capabilities. These
amplifiers provide a 90kHz gain-bandwidth product
while using only 10A of supply current per amplifier.
The MAX4241/MAX4243 have a low-power shutdown
mode that reduces supply current to less than 1A and
forces the output into a high-impedance state. Although
the minimum operating voltage is specified at +1.8V,
these devices typically operate down to +1.5V. The
combination of ultra-low-voltage operation, beyond-the-
rails inputs, rail-to-rail outputs, and ultra-low power con-
sumption makes these devices ideal for any portable/
two-cell battery-powered system.
These amplifiers have an input common-mode range
that extends 200mV beyond each rail, and their outputs
typically swing to within 9mV of the rails with a 100k
load. Beyond-the-rails input and rail-to-rail output char-
acteristics allow the full power-supply voltage to be
used for signal range. The combination of low input off-
set voltage, low input bias current, and high open-loop
gain makes them suitable for low-power/low-voltage
precision applications.
The MAX4240 is offered in a space-saving 5-pin SOT23
package. All specifications are guaranteed over the
-40C to +85C extended temperature range.
________________________Applications
Two-Cell Battery-
Strain Gauges
Powered Systems
Sensor Amplifiers
Portable/Battery-Powered
Cellular Phones
Electronic Equipment
Notebook Computers
Digital Scales
PDAs
____________________________Features
o
Ultra-Low-Voltage Operation:
Guaranteed Down to +1.8V
Typical Operation to +1.5V
o
Ultra-Low Power Consumption:
10A Supply Current per Amplifier
1A Shutdown Mode (MAX4241/MAX4243)
Up to 200,000 Hours Operation from Two AA
Alkaline Cells
o
Beyond-the-Rails 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
MAX4240MAX4244
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
________________________________________________________________
Maxim Integrated Products
1
V
EE
IN-
IN+
1
5
V
CC
OUT
MAX4240
SOT23-5
TOP VIEW
2
3
4
_________________Pin Configurations
19-1343; Rev 0; 3/98
PART
MAX4240
EUK-T
MAX4241
EUA
MAX4241ESA
-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.
_____________________Selector Guide
NO. OF
AMPS
PIN-PACKAGE
MAX4240
1
5-pin SOT23
MAX4241
1
8-pin MAX/SO
PART
MAX4242
2
8-pin MAX/SO
SHUTDOWN
--
Yes
--
MAX4243
2
10-pin MAX,
14-pin SO
MAX4244
4
14-pin SO
Yes
--
Beyond-the-Rails is a trademark of Maxim Integrated Products.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
MAX4242
EUA
MAX4242ESA
MAX4243
EUB
-40C to +85C
-40C to +85C
-40C to +85C
8 MAX
8 SO
10 MAX
MAX4243ESD
MAX4244
ESD
-40C to +85C
-40C to +85C
14 SO
14 SO
SOT
TOP MARK
ACCS
--
--
--
--
--
--
--
MAX4240MAX4244
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS -- T
A
= +25C
(V
CC
= +1.8V to +5.5V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, R
L
= 100k
tied to V
CC
/ 2, SHDN = V
CC
, T
A
= +25C, unless
otherwise noted.) (Note 1)
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
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Input Bias Current
I
B
2
6
nA
CONDITIONS
Input Offset Voltage
V
OS
0.20
0.75
mV
MAX4241ESA
(V
EE
- 0.2V)
V
CM
(V
CC
+ 0.2V)
0.25
1.40
MAX4240EUK/MAX424_EUA/
MAX4243EUB
0.20
0.88
MAX4242ESA/MAX4243ESD/
MAX4244ESD
Supply Current
per Amplifier
I
CC
10
12
A
V
CC
= 1.8V
SHDN = V
CC
14
18
V
CC
= 5.0V
2.0
3.0
V
CC
= 5.0V
Shutdown Supply
Current (Note 2)
I
CC(SHDN)
1.0
1.5
A
V
CC
= 1.8V
SHDN = V
EE
Supply-Voltage Range
V
CC
1.8
5.5
V
Inferred from PSRR test
(Note 3)
(Note 3)
Input Offset Current
I
OS
0.5
1.5
nA
V
IN+
- V
IN-
< 1.0V
Differential Input
Resistance
R
IN(DIFF)
45
M
V
IN+
- V
IN-
> 2.5V
4.4
k
Inferred from the CMRR test
Input Common-Mode
Voltage Range
V
CM
V
EE
- 0.2
V
CC
+ 0.2
V
V
CC
= 1.8V
Common-Mode
Rejection Ratio
(Note 4)
CMRR
72
90
dB
MAX4241ESA
72
90
MAX4242ESA/MAX4243ESD/
MAX4244ESD
66
88
MAX4240EUK/MAX424_EUA/
MAX4243EUB
V
CC
= 5.0V
77
94
MAX4241ESA
77
94
MAX4242ESA/MAX4243ESD/
MAX4244ESD
72
90
MAX4240EUK/MAX424_EUA/
MAX4243EUB
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS -- T
A
= +25C (continued)
(V
CC
= +1.8V to +5.5V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, R
L
= 100k
tied to V
CC
/ 2, SHDN = V
CC
, T
A
= +25C, unless
otherwise noted.) (Note 1)
Channel-to-Channel
Isolation (Note 6)
CH
ISO
80
dB
Specified at DC
Phase Margin
m
68
degrees
Gain Margin
G
m
18
dB
Slew Rate
SR
40
V/ms
SHDN Input Bias
Current (Note 2)
I
IH
, I
IL
40
80
nA
SHDN = V
CC
= 5.5V or SHDN = V
EE
= 0
SHDN Logic Low
(Note 2)
V
IL
0.3 x V
CC
V
6
15
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
23
35
Specified as
V
EE
- V
OL
Output Voltage
Swing Low
10
20
V
OL
40
60
mV
V
CC
= 5.0V
R
L
= 10k
R
L
= 100k
R
L
= 100k
V
CC
= 1.8V
R
L
= 10k
8
20
40
65
Specified as
V
CC
- V
OH
Output Voltage
Swing High
10
25
80
85
V
OH
70
73
60
95
mV
V
CC
= 5.0V
R
L
= 10k
2.5
mA
SHDN Logic High
(Note 2)
V
IH
0.7 x V
CC
V
(V
EE
+ 0.2V)
V
OUT
(V
CC
- 0.2V)
Large-Signal
Voltage Gain
90
94
A
VOL
82
85
dB
R
L
= 100k
R
L
= 100k
CONDITIONS
Sinking
V
CC
= 1.8V
R
L
= 10k
V
CC
= 5.0V
R
L
= 10k
R
L
= 100k
R
L
= 100k
R
L
= 10k
V
CC
= 1.8V
Gain-Bandwidth
Product
GBW
90
kHz
Power-Supply
Rejection Ratio
PSRR
80
85
dB
MAX4241ESA
1.8V
V
CC
5.5V
MAX4240MAX4244
78
82
MAX4240EUK/MAX424_EUA/
MAX4243EUB
80
85
MAX4242ESA/MAX4243ESD/
MAX4244ESD
Output Leakage
Current in Shutdown
(Notes 2, 5)
I
OUT(SHDN)
20
50
nA
SHDN = V
EE
= 0, V
CC
= 5.5V
Output Short-Circuit
Current
I
OUT(SC)
Sourcing
0.7
MAX4240MAX4244
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
4
_______________________________________________________________________________________
Enable Time from
Shutdown
t
ENABLE
150
Input Voltage Noise
Density
e
n
70
nV/
Hz
Input Current Noise
Density
i
n
0.05
pA/
Hz
Capacitive-Load
Stability
200
pF
Shutdown Time
t
SHDN
50
s
s
Power-Up Time
t
ON
200
s
Input Capacitance
C
IN
3
pF
f = 1kHz
f = 1kHz
A
VCL
= +1V/V, no sustained oscillations
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Total Harmonic
Distortion
THD
0.05
%
Settling Time to 0.01%
t
S
CONDITIONS
50
s
f
IN
= 1kHz, V
CC
= 5.0V, V
OUT
= 2Vp-p, A
V
= +1V/V
A
V
= +1V/V, V
CC
= 5.0V, V
OUT
= 2V
STEP
ELECTRICAL CHARACTERISTICS -- T
A
= +25C (continued)
(V
CC
= +1.8V to +5.5V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, R
L
= 100k
tied to V
CC
/ 2, SHDN = V
CC
, T
A
= +25C, unless
otherwise noted.) (Note 1)
ELECTRICAL CHARACTERISTICS -- T
A
= T
MIN
to T
MAX
(V
CC
= +1.8V to +5.5V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, R
L
= 100k
tied to V
CC
/ 2, SHDN = V
CC
, T
A
= T
MIN
to T
MAX
, unless oth-
erwise noted.) (Note 1)
SHDN = V
CC
1.2
Inferred from PSRR test
Inferred from the CMRR test
(Note 3)
CONDITIONS
MAX4241ESA
(V
EE
- 0.2V)
V
CM
(V
CC
+ 0.2V)
mV
V
OS
Input Offset Voltage
A
19
I
CC
SHDN = V
EE
14
V
1.8
5.5
V
CC
Supply-Voltage Range
Supply Current
per Amplifier
V
-0.2
V
CC
+ 0.2
V
CM
Input Common-Mode
Voltage Range
V/C
2
TC
VOS
Input Offset Voltage
Drift
nA
7
I
OS
Input Offset Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
A
3.5
I
CC(SHDN)
2.0
Shutdown Supply
Current (Note 2)
V
CC
= 1.8V
V
CC
= 5.0V
V
CC
= 1.8V
V
CC
= 5.0V
(Note 3)
nA
15
I
B
Input Bias Current
1.3
MAX4242ESA/MAX4243ESD/
MAX4244ESD
2.0
MAX4240EUK/MAX424_EUA/
MAX4243EUB
MAX4240MAX4244
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS -- T
A
= T
MIN
to T
MAX
(continued)
(V
CC
= +1.8V to +5.5V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, R
L
= 100k
tied to V
CC
/ 2, SHDN = V
CC
, T
A
= T
MIN
to T
MAX
, unless oth-
erwise noted.) (Note 1)
68
MAX4242ESA/MAX4243ESD/
MAX4244ESD
68
SHDN = V
EE
= 0, V
CC
= 5.5V
R
L
= 10k
64
CONDITIONS
MAX4240EUK/MAX424_EUA/
MAX4243EUB
MAX4241ESA
V
CC
= 1.8V
dB
CMRR
Common-Mode
Rejection Ratio
(Note 4)
nA
100
I
OUT(SHDN)
Output Leakage
Current in Shutdown
(Notes 2, 5)
76
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
R
L
= 100k
dB
76
A
VOL
Large-Signal
Voltage Gain
74
MAX4242ESA/MAX4243ESD/
MAX4244ESD
74
70
MAX4240EUK/MAX424_EUA/
MAX4243EUB
MAX4241ESA
V
CC
= 5.0V
76
MAX4242ESA/MAX4243ESD/
MAX4244ESD
76
74
MAX4240EUK/MAX424_EUA/
MAX4243EUB
MAX4241ESA
1.8V
V
CC
5.5V
dB
PSRR
Power-Supply
Rejection Ratio
R
L
= 100k
84
R
L
= 10k
66
(V
EE
+ 0.2V)
V
OUT
(V
CC
- 0.2V)
V
CC
= 1.8V
V
CC
= 5.0V
R
L
= 100k
dB
25
V
OH
Output Voltage
Swing High
R
L
= 100k
30
R
L
= 10k
V
CC
= 1.8V
R
L
= 10k
95
V
CC
= 5.0V
Specified as
V
CC
- V
OH
145
R
L
= 100k
dB
20
V
OL
Output Voltage
Swing Low
R
L
= 100k
25
R
L
= 10k
V
CC
= 1.8V
R
L
= 10k
50
V
CC
= 5.0V
Specified as
V
EE
- V
OL
75
V
0.3 x V
CC
V
IL
SHDN Logic Low
(Note 2)
PDF 
ZIP