Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps

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.

Applications

* Cellular Handsets * Cellular Phones * Digital Cameras (DIGICAMs) * Digital Scales * GPS Solutions * MP3 and Portable Media Players * Notebook Computers * PDAs * Portable/Battery-Powered Electronic Equipment * Sensor Amplifiers * Strain Gauges * Two-Cell Battery Powered Systems

* 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