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 amplifiers
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 combination
of ultra-low-voltage operation, beyond-the-rails
inputs, rail-to-rail outputs, and ultra-low power consumption
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
100kΩ load. Beyond-the-rails input and rail-to-rail output
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.
Key Features
Applications/Uses
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
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