Datasheet

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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.

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

OPA349

OPEN-LOOP GAIN AND PHASE vs FREQUENCY

Frequency (Hz)

Gain (dB)

Phase (°)

100

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.

Summary of content (23 pages)

PAGE 1
OPA OPA349 OPA2349 349 OPA 2349 SBOS121B – JUNE 2000 – REVISED JANUARY 2004 1µA, Rail-to-Rail I/O CMOS OPERATIONAL AMPLIFIERS FEATURES 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.
PAGE 2
ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V+ to V– ................................................................... 5.5V Signal Input Terminals, Voltage(2) .................. (V–) – 0.5V to (V+) + 0.5V Current(2) .................................................... 10mA Output Short Circuit(3) .............................................................. Continuous Operating Temperature, OPA2349 ................................ –55°C to +125°C Operating Temperature, OPA349 ............................
PAGE 3
ELECTRICAL CHARACTERISTICS (Single): VS = +1.8V to +5.5V Boldface limits apply over the specified temperature range, TA = 0°C to +70°C. At TA = +25°C, and RL = 1MΩ connected to VS /2, unless otherwise noted. OPA349 PARAMETER OFFSET VOLTAGE Input Offset Voltage Over Temperature Drift vs Power-Supply Rejection Ratio Over Temperature CONDITION VOS dVOS /dT PSRR INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection Ratio Over Temperature VCM CMRR VS = 1.8V to 5.5V, VCM = (V–) + 0.
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ELECTRICAL CHARACTERISTICS (Dual): VS = +1.8V to +5.5V Boldface limits apply over the specified temperature range, TA = –40°C to +70°C. At TA = +25°C, and RL = 1MΩ connected to VS /2, unless otherwise noted. OPA2349 PARAMETER OFFSET VOLTAGE Input Offset Voltage Over Temperature Drift vs Power Supply Over Temperature Channel Separation, dc CONDITION VOS dVOS /dT PSRR INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection Ratio Over Temperature VCM CMRR VS = 1.8V to 5.5V, VCM = (V–) + 0.
PAGE 5
TYPICAL CHARACTERISTICS At TA = +25°C, VS = +5V, and RL = 1MΩ connected to VS/2, unless otherwise noted. OPEN-LOOP GAIN vs TEMPERATURE OPEN-LOOP GAIN AND PHASE vs FREQUENCY 100 100 90 0 RL = 1MΩ 90 50 90 40 30 Gain (dB) 45 Phase 60 Phase (°) 70 Gain (dB) 95 Gain 80 Single version operation below 0°C is not recommended. 85 75 135 70 20 10 65 180 0 60 0.
PAGE 6
TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = +5V, and RL = 1MΩ connected to VS/2, unless otherwise noted. QUIESCENT AND SHORT-CIRCUIT vs SUPPLY VOLTAGE QUIESCENT CURRENT vs TEMPERATURE Quiescent Current (µA) 2.5 Quiescent Current (µA) 12 1.4 2.0 OPA2349 1.5 1.0 OPA349 1.2 ISC at 25°C 8 1.0 6 0.8 IQ ISC at 125°C 4 2 0.4 –50 –25 0 25 50 75 85 1.5 2.0 2.5 Temperature (°C) 4.0 4.5 5.0 5.5 10k VS = +5.5V 10 Input Bias Current (pA) Short-Circuit Current (mA) 3.
PAGE 7
TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = +5V, and RL = 1MΩ connected to VS/2, unless otherwise noted.
PAGE 8
TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = +5V, and RL = 1MΩ connected to VS/2, unless otherwise noted. SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE (SOT23, SO-8) 100 100 90 90 80 70 60 50 G = −1V/V, RL = 1MΩ 40 30 G = +1V/V, RL = 1MΩ 20 Small-Signal Overshoot (%) Small-Signal Overshoot (%) SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE (SC70) G = +1V/V 70 60 50 40 30 20 10 10 0 0 10 8 G = −1V/V 80 100 Load Capacitance (pF) 10 1k 100 Load Capacitance (pF) 1k OPA349, 2349 www.
PAGE 9
APPLICATIONS INFORMATION The OPA349 series op amps are unity-gain stable and can operate on a single supply, making them highly versatile and easy to use. Power-supply pins should be bypassed with 0.01µF ceramic capacitors. The OPA349 series op amps are fully specified and tested from +1.8V to +5.5V. Parameters that vary significantly with operating voltages or temperature are shown in the Typical Characteristic curves.
PAGE 10
DESIGN OPTIMIZATION WITH RAIL-TO-RAIL INPUT OP AMPS wide input swing is required. A design option would be to configure the op amp as a unity-gain inverter as shown below and hold the noninverting input at a set common-mode voltage outside the transition region. This can be accomplished with a voltage divider from the supply. The voltage divider should be designed such that the biasing point for the noninverting input is outside the transition region.
PAGE 11
PACKAGE OPTION ADDENDUM www.ti.
PAGE 12
PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 24-Jan-2013 Status (1) OPA349UAG4 ACTIVE Package Type Package Pins Package Qty Drawing SOIC D 8 75 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) CU NIPDAU Level-2-260C-1 YEAR (4) OPA 349UA (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) OPA2349EA/250 SOT-23 DCN 8 250 180.0 8.4 OPA2349EA/3K SOT-23 DCN 8 3000 180.0 OPA349SA/250 SC70 DCK 5 250 179.0 OPA349SA/3K SC70 DCK 5 3000 OPA349UA/2K5 SOIC D 8 2500 3.2 3.1 1.39 4.0 8.0 Q3 8.4 3.2 3.1 1.39 4.0 8.0 Q3 8.4 2.2 2.5 1.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA2349EA/250 SOT-23 DCN OPA2349EA/3K SOT-23 DCN 8 250 210.0 185.0 35.0 8 3000 210.0 185.0 35.0 OPA349SA/250 SC70 DCK OPA349SA/3K SC70 DCK 5 250 203.0 203.0 35.0 5 3000 203.0 203.0 OPA349UA/2K5 SOIC D 35.0 8 2500 367.0 367.0 35.
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