19-1612; Rev 3; 4/02
MAX4291 /MAX4292 /MAX4294
The MAX4291/MAX4292/MAX4294 family of micropow- er 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 sup- ply 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 com- mon-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2k load. Although the minimum operating voltage is speci- fied 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-pow- ered system.
The single MAX4291 is offered in an ultra-small 5-pin SC70 package. The dual MAX4292 is offered in a space-saving 8-bump, 1.5mm X 1.5mm footprint, ultra chip-scale package (UCSP™).
2-Cell Battery-Operated Systems Portable Electronic Equipment Battery-Powered Instrumentation Digital Scales
Strain Gauges Sensor Amplifiers Cellular Phones
TOPVIEW (BUMPSONBOTTOM) OUTA VCC OUTB INA- MAX4292 INB- INA+ VEE INB+ UCSP Pin Configurations continued at end of data sheet. |
Pin Configurations
Ultra-Low Voltage Operation—Guaranteed Down to 1.8V
100µA Supply Current per Amplifier 500kHz Gain-Bandwidth Product
120dB Open-Loop Voltage Gain (RL = 100k)
0.017% Total Harmonic Distortion Plus Noise (THD + N) at 1kHz
Rail-to-Rail Input Common-Mode Range Rail-to-Rail Output Drives 2k 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)
Ordering Information
PART | TEMP RANGE | PIN- PACKAGE | TOP MARK |
MAX4291EXK-T | -40C to +85C | 5 SC70-5 | AAD |
MAX4291EUK-T | -40C to +85C | 5 SOT23-5 | ADML |
MAX4292EBL-T* | -40C to +85C | 8 UCSP-8 | AAJ |
MAX4292EUA | -40C to +85C | 8 µMAX | — |
MAX4292ESA | -40C to +85C | 8 SO | — |
MAX4294ESD | -40C to +85C | 14 SO | — |
MAX4294EUD | -40C to +85C | 14 TSSOP | — |
*UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this data sheet for more information.
Selector Guide
PART | AMPLIFIERS | PIN-PACKAGE |
MAX4291 | 1 | 5-pin SC70/SOT23 |
MAX4292 | 2 | 8-pin µMAX/SO/UCSP |
MAX4294 | 4 | 14-pin SO/TSSOP |
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. UCSP is a trademark of Maxim Integrated Products, Inc.
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MAX4291EUK+T MAX4291EUK-T MAX4291EXK+T MAX4291EXK-T MAX4292ESA MAX4292ESA+ MAX4292ESA+T MAX4292EUA MAX4292EUA+ MAX4292EUA+T MAX4294ESD+ MAX4294ESD+T MAX4294EUD+ MAX4294EUD+T MAX4292ESA-T MAX4292EUA-T MAX4292EBL-T MAX4292EBL+T