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OPA2349

ACTIVE

Dual, 5.5-V, 70-kHz, low quiescent current (1-μA), RRIO operational amplifier

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Data sheet

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TLV9042 ACTIVE Dual, 5.5-V, 350-kHz, Ultra-low 1.2-V, low quiescent current (10-μA) op amp Higher GBW (350KHz), lower noise (66nV/√Hz), better accuracy (2.25mV Vos max)

OPA2349

ACTIVE
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Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Rail-to-rail In, Out GBW (typ) (MHz) 0.07 Slew rate (typ) 0.02 Vos (offset voltage at 25°C) (max) (mV) 10 Iq per channel (typ) (mA) 0.001 Vn at 1 kHz (typ) (nV√Hz) 300 Rating Catalog Operating temperature range (°C) -55 to 125 Offset drift (typ) (V/°C) 0.000015 Input bias current (max) (pA) 10 CMRR (typ) (dB) 60 Iout (typ) (A) 0.008 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) 0.002 Input common mode headroom (to positive supply) (typ) (V) 0.001 Output swing headroom (to negative supply) (typ) (V) 0.3 Output swing headroom (to positive supply) (typ) (V) -0.3
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Rail-to-rail In, Out GBW (typ) (MHz) 0.07 Slew rate (typ) 0.02 Vos (offset voltage at 25°C) (max) (mV) 10 Iq per channel (typ) (mA) 0.001 Vn at 1 kHz (typ) (nV√Hz) 300 Rating Catalog Operating temperature range (°C) -55 to 125 Offset drift (typ) (V/°C) 0.000015 Input bias current (max) (pA) 10 CMRR (typ) (dB) 60 Iout (typ) (A) 0.008 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) 0.002 Input common mode headroom (to positive supply) (typ) (V) 0.001 Output swing headroom (to negative supply) (typ) (V) 0.3 Output swing headroom (to positive supply) (typ) (V) -0.3
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DCN) 8 4.64 mm² 2.9 x 1.6
  • 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.
  • 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.

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.

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
* Data sheet OPA349, OPA2349: 1uA, Rail-to-Rail, I/O, CMOS Operational Amplifiers datasheet (Rev. B) 07 Jan 2004
Technical article What is an op amp? 21 Jan 2020
Technical article How to lay out a PCB for high-performance, low-side current-sensing designs 06 Feb 2018
Technical article Low-side current sensing for high-performance cost-sensitive applications 22 Jan 2018
Technical article Voltage and current sensing in HEV/EV applications 22 Nov 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017

Design & development

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

Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

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 (...)

User guide: PDF
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Evaluation board

DUAL-DIYAMP-EVM — Dual Channel Universal Do-It-Yourself (DIY) Amplifier Circuit Evaluation Module

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 (...)
User guide: PDF
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Simulation model

OPA2349 PSpice Model

SBOM648.ZIP (55 KB) - PSpice Model
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Simulation model

OPA2349 TINA-TI Reference Design

SBOM649.TSC (108 KB) - TINA-TI Reference Design
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Simulation model

OPA2349 TINA-TI Spice Model

SBOM650.ZIP (6 KB) - TINA-TI Spice Model
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Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

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 operational-amplifier (...)
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Design tool

CIRCUIT060013 — Inverting amplifier with T-network feedback circuit

This design inverts the input signal, VIN, and applies a signal gain of 1000 V/V or 60 dB. The inverting amplifier with T-feedback network can be used to obtain a high gain without a small value for R4 or very large values for the feedback resistors.
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Design tool

CIRCUIT060015 — Adjustable reference voltage circuit

This circuit combines an inverting and non-inverting amplifier to make a reference voltage adjustable from the negative of the input voltage up to the input voltage. Gain can be added to increase the maximum negative reference level.
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Design tool

CIRCUIT060074 — High-side current sensing with comparator circuit

This high-side, current sensing solution uses one comparator with a rail-to-rail input common mode range to create an over-current alert (OC-Alert) signal at the comparator output (COMP OUT) if the load current rises above 1 A. The OC-Alert signal in this implementation is active low. So when the (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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

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