MAX4294

Features:

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% THD + Noise 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
400µV Input Offset Voltage
Single Available in Ultra-Small 5-Pin SC70
   Dual Available in Space-Saving 8-Pin µMAX

Application

2-Cell Battery-Operated Systems
Portable Electronic Equipment
Battery-Powered Instrumentation
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones


Specifications

Supply Voltage (V_CC to V_EE).................................................+6V
All Other Pins .................................(V_CC + 0.3V) to (VEE - 0.3V)
Output Short-Circuit Duration...................................Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C) ..............200mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW
8-Pin µMAX (derate 4.10mW/°C above +70°C).............330mW
8-Pin SO (derate 5.88mW/°C above +70°C) ................471mW
14-Pin SO (derate 8.33mW/°C above +70°C) ..............667mW
14-Pin TSSOP (derate 6.3mW/°C above +70°C) ..........500mW
Operating Temperature Range.........................-40°C to +85°C
Junction Temperature ....................................................+150°C
Storage Temperature Range ..........................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C


Description

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 (±400µV) and high-open-loop gain makes them suitable for low power/low-voltage high-precision applications.

The MAX4291/MAX4292/MAX4294 have an input common-mode range that extends to each supply rail, and their outputs typically swing within 20mV 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 MAX4294 ideal for any portable/two-cell battery-powered system.

The single MAX4291 is offered in an ultra-small 5-pin SC70 package and the dual MAX4292 is offered in a space-saving 8-pin µMAX package.