General Description
The MAX44259/MAX44260/MAX44261/MAX44263 offer a unique combination of high speed, precision, low noise, and low-voltage operation making them ideally suited for a large number of signal processing functions such as filtering and amplification of signals in portable and industrial equipment.
The devices’ rail-to-rail input/outputs and low noise guarantee maximum dynamic range in demanding applications such as 12- to 14-bit SAR ADC drivers. Unlike traditional rail-to-rail input structures, input crossover distortion is absent due to an optimized input stage with an ultra-quiet charge pump.
The MAX44260 includes a fast-power-on shutdown mode for further power savings. The MAX44261 offers a unique on-demand calibration pin where the user can invoke selftrimming of the input offset voltage. The MAX44263 is a dual amplifier.

Benefits and Features
● Low Noise for Higher System Accuracy
   • 12.7nV/√Hz Input Voltage-Noise Density
   • 1.2fA/√Hz Input Current-Noise Density
   • 50µV (max) VOS at +25°C
   • 110dB Total Harmonic Distortion
● 15MHz Unity-Gain Bandwidth Enables for HighBandwidth Applications
● Low Power Extends the Battery Life of Portable Equipment
   • 500fA Low Input Bias Current
   • 750µA Quiescent Current per Amplifier
   • < 1µA Supply Current in Shutdown
● On-Demand VOS Self-Calibration (MAX44261)
● Saves Board Space
   • Small, 2mm x 2mm SC70 and 1mm x 1.5mm Thin µDFN (MAX44260) and SOT23 (MAX44259) Packages
● Wide Supply Range from 1.8V to 5.5V Simplifies Power-Supply Requirements

Applications
● Notebooks
● 3G/4G Handsets
● Portable Media Players
● Portable Medical Instruments
● Battery-Operated Devices
● Analog-to-Digital Converter Buffers
● Transimpedance Amplifiers