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FEATURES

LOW SUPPLY CURRENT: 1μA

GAIN-BANDWIDTH: 70kHz

UNITY-GAIN STABLE

LOW INPUT BIAS CURRENT: 10pA (max)

WIDE SUPPLY RANGE: 1.8V to 5.5V

INPUT RANGE: 200mV Beyond Rails

OUTPUT SWINGS TO 350mV OF RAILS

OUTPUT DRIVE CURRENT: 8mA

OPEN-LOOP GAIN: 90dB

MicroPACKAGES: SC70, SOT23-5, SOT23-8

APPLICATIONS

BATTERY PACKS AND POWER SUPPLIES

PORTABLE PHONES, PAGERS, AND CAMERAS

SOLAR-POWERED SYSTEMS

SMOKE, GAS, AND FIRE DETECTION SYSTEMS

REMOTE SENSORS

PCMCIA CARDS

DRIVING ANALOG-TO-DIGITAL (A/D) CONVERTERS

MicroPOWER FILTERS

DESCRIPTION

The OPA349 and OPA2349 are ultra-low power operational

amplifiers that provide 70kHz bandwidth with only 1μA quiescent

current. These rail-to-rail input and output amplifiers are

specifically designed for battery-powered applications. The

input common-mode voltage range extends 200mV beyond

the power-supply rails and the output swings to within 350mV

of the rails, maintaining wide dynamic range. Unlike some

micropower op amps, these parts are unity-gain stable and

require no external compensation to achieve wide bandwidth.

The OPA349 features a low input bias current that

allows the use of large source and feedback resistors.

The OPA349 can be operated with power supplies from 1.8V

to 5.5V with little change in performance, ensuring continuing

superior performance even in low battery situations.

The OPA349 comes in miniature SOT23-5, SC70, and SO-8

surface-mount packages. The OPA2349 dual is available in

SOT23-8, and SO-8 surface-mount packages. These tiny

packages are ideal for use in high-density applications, such

as PCMCIA cards, battery packs, and portable instruments.

The OPA349 is specified for 0°C to +70°C. The OPA2349 is

specified for –40°C to +70°C.