The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supplies and has Rail-to-Rail input/output capabilities. These amplifiers provide a 500kHz gain-bandwidth product and 120dB open-loop voltage gain while using only 100μA of supply current per amplifier. The combination of low input offset voltage (±200μV) and high open-loop gain makes them ideal for low-power/low-voltage, high-precision portable applications. The MAX4291/MAX4292/MAX4294 have an input common-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2kΩ load. 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, rail-to-rail inputs/output, and low-power consumption makes these devices ideal for any portable/two-cell battery-powered system. The single MAX4291 is offered in an ultra-small 5-pin SC70 package. The dual MAX4292ESA+T is offered in a space-saving 8-bump, 1.5mm x 1.5mm footprint, ultra chip-scale package (UCSP).
Feature
- Ultra-Low Voltage Operation—Guaranteed Down to 1.8V
- 100μA Supply Current per Amplifier
- 500kHz Gain-Bandwidth Product
- 120dB Open-Loop Voltage Gain (RL = 100kΩ)
- 0.017% Total Harmonic Distortion Plus Noise (THD + N) at 1kHz
- Rail-to-Rail Input Common-Mode Range
- Rail-to-Rail Output Drives 2kΩ Load
- No Phase Reversal for Overdriven Inputs
- Unity-Gain Stable for Capacitive Loads up to 100pF
- 200μV Input Offset Voltage (MAX4292/MAX4294)
- Single in Small 5-Pin SC70
- Available in Ultra-Small Packages:
- 5-Pin SC70 (MAX4291)
- 8-Bump UCSP (MAX4292)
Applications
- 2-Cell Battery-Operated Systems
- Automotive Sensors
- Base Station/Wireless Infrastructure
- Battery-Powered Applications
- Cell Phones
- Computers: Desktops, Workstations, and Servers
- Computers: Motherboards
- Computers: Notebook
- Digital Scales/Strain Gauges
- GPS Solutions
- MP3 Docking Stations: Mid Level
- Portable Electronic Equipment
- Programmable Logic Controllers (PLCs)
- Sensor Amplifiers
- Set-Top Boxes
- Strain Gauges