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.