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 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 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
100k
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.
Applications
Features
Ultra-Low-Voltage Operation:
Guaranteed Down to +1.8V
Typical Operation to +1.5V
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
Beyond-the-Rails Input Common-Mode Range
Outputs Swing Rail-to-Rail
No Phase Reversal for Overdriven Inputs
200V 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 MAX Packages
MAX4240–MAX4244
Single/Dual/Quad, +1.8V/10A, SOT23,
Beyond-the-Rails Op Amps
________________________________________________________________ Maxim Integrated Products
1
TOP VIEW
OUT
1
5
VCC
MAX4240
VEE 2
IN+
3
4
IN-
SOT23-5
Pin Configurations
Ordering Information
19-1343; Rev
3; 9/06
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.
Two-Cell Battery-
Powered Systems
Portable/Battery-Powered
Electronic Equipment
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones
Notebook Computers
PDAs
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX4240EUK-T
-40°C to +85°C
5 SOT23-5
ACCS
MAX4241EUA
-40°C to +85°C
8 MAX
—
MAX4241ESA
-40°C to +85°C
8 SO
—
MAX4242EUA
-40°C to +85°C
8 MAX
—
MAX4242ESA
-40°C to +85°C
8 SO
—
MAX4243EUB
-40°C to +85°C
10 MAX
—
MAX4243ESD
-40°C to +85°C
14 SO
—
MAX4244ESD
-40°C to +85°C
14 SO
—
Selector Guide
PART
NO. OF
AMPS
SHUTDOWN
PIN-PACKAGE
MAX4240
1
—
5-pin SOT23
MAX4241
1
Yes
8-pin MAX/SO
MAX4242
2
—
8-pin MAX/SO
MAX4243
2
Yes
10-pin MAX,
14-pin SO
MAX4244
4
—
14-pin SO
Beyond-the-Rails is a trademark and MAX is a registered
trademark of Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.