1µA, Rail-to-Rail I/O CMOS
OPERATIONAL AMPLIFIERS
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
●
Micro
PACKAGES: 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
●
Micro
POWER FILTERS
DESCRIPTION
The OPA349 and OPA2349 are ultra-low power operational
amplifiers that provide 70kHz bandwidth with only 1µA quies-
cent 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 band-
width. 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.
OPA349
OPA2349
SBOS121B – JUNE 2000 – REVISED JANUARY 2004
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2000-2004, Texas Instruments Incorporated
FEATURES PRODUCT
1µA, 5.5kHz, Rail-To-Rail TLV240x
1µA, 5.5kHz, Rail-To-Rail TLV224x
7µA, 160kHz, Rail-To-Rail, 2.7V to 16V Supply TLV238x
7µA, 160kHz, Rail-To-Rail, Micro Power TLV27Lx
20µA, 500kHz, Rail-To-Rail, 1.8V Micro Power TLV276x
20µA, 350kHz, Rail-To-Rail, Micro Power OPAx347
45µA, 1MHz, Rail-To-Rail, 2.1V to 5.5V Supply OPAx348
OPAx349 RELATED PRODUCTS
OPEN-LOOP GAIN AND PHASE vs FREQUENCY
Frequency (Hz)
Gain (dB)
Phase (°)
100
90
80
70
60
50
40
30
20
10
0
0
45
90
135
180
1 10 100 1k 10k 100k 1M0.1
Gain
Phase
www.ti.com
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
