MAX4291 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Ultra-Small, +1.8V, μPower, Rail-to-Rail I/O Op Amps

19-1612; Rev 0; 3/00
Ultra-Small, +1.8V, µPower,
Rail-to-Rail I/O Op Amps
General Description
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 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 com-
mon-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 these devices ideal for any portable/two-cell bat-
tery-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.
Applications
2-Cell Battery-Operated Systems
Portable Electronic Equipment
Battery-Powered Instrumentation
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones
PART
MAX4291
MAX4292
MAX4294
Selector Guide
AMPLIFIERS
PER PACKAGE
1
2
4
PIN-PACKAGE
5-pin SC70/SOT23
8-pin µMAX/SO
14-pin SO/TSSOP
Features
o Ultra-Low Voltage Operation—Guaranteed Down
to +1.8V
o 100µA Supply Current per Amplifier
o 500kHz Gain-Bandwidth Product
o 120dB Open-Loop Voltage Gain (R_L = 100kΩ)
o 0.017% THD + Noise at 1kHz
o Rail-to-Rail Input Common-Mode Range
o Rail-to-Rail Output Drives 2kΩ Load
o No Phase Reversal for Overdriven Inputs
o Unity-Gain Stable for Capacitive Loads up to 100pF
o 400µV Input Offset Voltage
o Single Available in Ultra-Small 5-Pin SC70
Dual Available in Space-Saving 8-Pin µMAX
Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
MAX4291EXK-T
MAX4291EUK-T
MAX4292EUA*
MAX4292ESA*
MAX4294ESD*
MAX4294EUD*
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
5 SC70-5
5 SOT23-5
8 µMAX
8 SO
14 SO
14 TSSOP
*Future product—contact factory for availability.
TOP
MARK
AAD
ADML
—
—
—
—
Pin Configurations
TOP VIEW
IN+ 1
V_EE 2
IN- 3
MAX4291
5 V_{CC OUTA 1}
INA- 2
INA+ 3
4 OUT VEE 4
MAX4292
8 VCC
7 OUTB
6 INB-
5 INB+
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
SC70-5/SOT23-5
µMAX/SO
Pin Configurations continued at end of data sheet.
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