19-1343; Rev
3;
9/06
Single/Dual/Quad, +1.8V/10µA, SOT23,
Beyond-the-Rails Op Amps
General Description
The MAX4240–MAX4244 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-Rails™
inputs and rail-to-rail output capabilities. These ampli-
fiers provide a 90kHz gain-bandwidth product while
using only 10µA of supply current per amplifier. The
MAX4241/MAX4243 have a low-power shutdown mode
that reduces supply current to less than 1µA 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 combina-
tion 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 out-
puts typically swing to within 9mV of the rails with a
100kΩ load. Beyond-the-rails input and rail-to-rail out-
put characteristics allow the full power-supply voltage
to be used for signal range. The combination 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 MAX4240 is offered in a space-saving 5-pin
SOT23 package. All specifications are guaranteed
over the -40°C to +85°C extended temperature range.
♦
Ultra-Low-Voltage Operation:
Guaranteed Down to +1.8V
Typical Operation to +1.5V
♦
Ultra-Low Power Consumption:
10µA Supply Current per Amplifier
1µA Shutdown Mode (MAX4241/MAX4243)
Up to 200,000 Hours Operation from Two AA
Alkaline Cells
♦
Beyond-the-Rails 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
Features
MAX4240–MAX4244
Ordering Information
PART
MAX4240EUK-T
MAX4241EUA
MAX4241ESA
MAX4242EUA
MAX4242ESA
MAX4243EUB
MAX4243ESD
MAX4244ESD
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
PIN-
PACKAGE
5 SOT23-5
8 µMAX
8 SO
8 µMAX
8 SO
10 µMAX
14 SO
14 SO
TOP
MARK
ACCS
—
—
—
—
—
—
—
Applications
Two-Cell Battery-
Powered Systems
Portable/Battery-Powered
Electronic Equipment
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones
Notebook Computers
PDAs
Selector Guide
PART
MAX4240
MAX4241
MAX4242
MAX4243
MAX4244
NO. OF
AMPS
1
1
2
2
4
SHUTDOWN
—
Yes
—
Yes
—
PIN-PACKAGE
5-pin SOT23
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
MAX4240
IN+
3
4
IN-
Beyond-the-Rails is a trademark and µMAX is a registered
trademark of Maxim Integrated Products, Inc.
SOT23-5
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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, +1.8V/10µA, SOT23,
Beyond-the-Rails Op Amps
MAX4240–MAX4244
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
(V
CC
= +1.8V to +5.5V, V
EE
= 0, V
CM
= 0, V
OUT
= V
CC
/ 2, R
L
= 100kΩ tied to V
CC
/ 2,
SHDN
= V
CC
, T
A
= +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
Supply-Voltage Range
Supply Current
per Amplifier
Shutdown Supply
Current (Note 2)
SYMBOL
V
CC
I
CC
I
CC(SHDN)
CONDITIONS
Inferred from PSRR test
SHDN
= V
CC
SHDN
= V
EE
V
CC
= 1.8V
V
CC
= 5.0V
V
CC
= 1.8V
V
CC
= 5.0V
MAX4241ESA
Input Offset Voltage
V
OS
(V
EE
- 0.2V)
≤
V
CM
≤
(V
CC
+ 0.2V)
MAX4242ESA/MAX4243ESD/
MAX4244ESD
MAX4240EUK/MAX424_EUA/
MAX4243EUB
MIN
1.8
10
14
1.0
2.0
±0.20
±0.20
±0.25
±2
±0.5
45
4.4
V
EE
- 0.2
72
69
63
74
74
69
90
90
88
94
94
90
dB
V
CC
+ 0.2
TYP
MAX
5.5
12
18
1.5
3.0
±0.75
±0.88
±1.40
±6
±1.5
nA
nA
MΩ
kΩ
V
mV
UNITS
V
µA
µA
Input Bias Current
Input Offset Current
Differential Input
Resistance
Input Common-Mode
Voltage Range
I
B
I
OS
R
IN(DIFF)
V
CM
(Note 3)
(Note 3)
⎥
V
IN+
- V
IN-
⎥
< 1.0V
⎥
V
IN+
- V
IN-
⎥
> 2.5V
Inferred from the CMRR test
MAX4241ESA
V
CC
= 1.8V
MAX4242ESA/MAX4243ESD/
MAX4244ESD
MAX4240EUK/MAX424_EUA/
MAX4243EUB
MAX4241ESA
V
CC
= 5.0V
MAX4242ESA/MAX4243ESD/
MAX4244ESD
MAX4240EUK/MAX424_EUA/
MAX4243EUB
Common-Mode
Rejection Ratio
(Note 4)
CMRR
2
_______________________________________________________________________________________
MCU
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