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Product details

Parameters

Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.8 Rail-to-rail In, Out GBW (Typ) (MHz) 0.07 Slew rate (Typ) (V/us) 0.02 Vos (offset voltage @ 25 C) (Max) (mV) 10 Iq per channel (Typ) (mA) 0.001 Vn at 1 kHz (Typ) (nV/rtHz) 300 Rating Catalog Operating temperature range (C) -55 to 125 Offset drift (Typ) (uV/C) 15 Features Input bias current (Max) (pA) 10 CMRR (Typ) (dB) 60 Output current (Typ) (mA) 8 Architecture CMOS open-in-new Find other General-purpose op amps

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 SOT-23 (DCN) 8 8 mm² 2.9 x 2.8 open-in-new Find other General-purpose op amps

Features

  • LOW SUPPLY CURRENT: 1 µA
  • 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

All trademarks are the property of their respective owners.

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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.

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Technical documentation

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Type Title Date
* Datasheet OPA349, OPA2349: 1uA, Rail-to-Rail, I/O, CMOS Operational Amplifiers datasheet (Rev. B) Jan. 07, 2004
Technical articles What is an op amp? Jan. 21, 2020
Technical articles Designing tiny microphone circuits with the industry’s smallest op amp Apr. 12, 2018
Technical articles How to lay out a PCB for high-performance, low-side current-sensing designs Feb. 06, 2018
Technical articles Low-side current sensing for high-performance cost-sensitive applications Jan. 22, 2018
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$29.00
Description

The TI Precision Amplifier Quickstart Kit simplifies op amp selection, design, and evaluation with samples of six op amps and an evaluation module for prototyping surface-mount ICs. The kit is the perfect starting point for your amplifier designs.

You may also be interested in TI Precision Labs, the (...)

Features

The kit includes:

  • Six samples: Three low-power, low-voltage amplifiers and three low-power, wide-supply amplifiers. See the table below for the complete list.
  • DIP Adapter Evaluation Module (DIP-ADAPTER-EVM) for prototyping surface-mount ICs. The EVM supports the following package types: D or U (...)
EVALUATION BOARDS Download
document-generic User guide
Description

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

The (...)

Features
  • Simplifies prototyping of SMT IC’s
  • Supports 6 common package types
  • Low Cost
EVALUATION BOARDS Download
document-generic User guide
$20.00
Description
The DUAL-DIYAMP-EVM is a unique evaluation module (EVM) family that provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits, enabling you to quickly evaluate design concepts and verify simulations. It is designed specifically for dual package op amps in the (...)
Features
  • 10 circuit configurations to choose from: Non-Inverting, Inverting, Active Filters, Difference Amplifier with Reference Buffer, and more!
  • Multiple interface options: SMA, Header, Breadboard, Wire
  • Designed for 0805 size components; 0603 size friendly
  • Circuit schematic provided in silkscreen on the back (...)
EVALUATION BOARDS Download
document-generic User guide
Description

The Universal OPAMPEVM is a series of general purpose blank circuit boards that simplify prototyping circuits for a variety of IC package types. The evaluation module board design allows many different circuits to be constructed easily and quickly. Five models are offered with each targeted for (...)

Design tools & simulation

SIMULATION MODELS Download
SBOM648.ZIP (55 KB) - PSpice Model
SIMULATION MODELS Download
SBOM649.TSC (108 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM650.ZIP (6 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SOT-23 (DCN) 8 View options

Ordering & quality

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