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OPA313

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1-Channel, 1-MHz, low-noise, low power, RRIO 1.8-V op amp

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1-Channel, 1-MHz, low-noise, low power, RRIO 1.8-V op amp

OPA313

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Product details

Parameters

Number of channels (#) 1 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) 1 Slew rate (Typ) (V/us) 0.5 Vos (offset voltage @ 25 C) (Max) (mV) 2.5 Iq per channel (Typ) (mA) 0.05 Vn at 1 kHz (Typ) (nV/rtHz) 25 Rating Catalog Operating temperature range (C) -40 to 125 Offset drift (Typ) (uV/C) 2 Features EMI Hardened Input bias current (Max) (pA) 10 CMRR (Typ) (dB) 80 Output current (Typ) (mA) 15 Architecture CMOS open-in-new Find other General-purpose op amps

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 SOT-SC70 (DCK) 5 4 mm² 2 x 2.1 open-in-new Find other General-purpose op amps

Features

  • Low IQ: 50 µA/ch
  • Wide Supply Range: 1.8 V to 5.5 V
  • Low Noise: 25 nV/√Hz at 1 kHz
  • Gain Bandwidth: 1 MHz
  • Low Input Bias Current: 0.2 pA
  • Low Offset Voltage: 0.5 mV
  • Unity-Gain Stable
  • Internal RF/EMI Filter
  • Extended Temperature Range:
    –40°C to +125°C
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Description

The OPA313 family of single-, dual-, and quad-channel op amps represents a new generation of low-cost, general purpose, micro-power operational amplifiers. Featuring rail-to-rail input and very low noise (25 nV/√Hz at 1 kHz) makes this family very attractive for a variety of battery-powered applications that require a good balance between cost and performance. The low input bias current supports those op amps to be used in applications with megaohm source impedances.

The robust design of the OPA313 devices provides ease-of-use to the circuit designer: unity-gain stability with capacitive loads of up to 150 pF, integrated RF/EMI rejection filter, no phase reversal in overdrive conditions, and high electrostatic discharge (ESD) protection (4-kV HBM).

These devices are optimized for operation at voltages as low as +1.8 V (±0.9 V) and up to +5.5 V (±2.75 V), and are specified over the extended temperature range of –40°C to +125°C.

The OPA313 (single) is available in both SC70-5 and SOT23-5 packages. The OPA2313 (dual) is offered in SO-8, MSOP-8, and DFN-8 packages. The quad-channel OPA4313 is offered in a TSSOP-14 package.

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Technical documentation

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Type Title Date
* Datasheet 1-MHz, Micro-Power, Low-Noise, RRIO, 1.8-V CMOS Op Amp Precision Value Line Seri datasheet (Rev. C) Mar. 06, 2013
Technical articles What is an op amp? Jan. 21, 2020
Application notes Low-side, bidirectional current-sensing circuit (Rev. B) Feb. 01, 2019
More literature Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. C) Nov. 30, 2018
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
More literature The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
More literature Precision Amplifier Quickstart Kit brochure (Rev. A) Jan. 13, 2015

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 (...)
View details
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
View details
EVALUATION BOARDS Download
document-generic User guide
Description
The 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 available in three industry-standard packages (SC70, SOT23, SOIC) and 12 (...)
Features
  • 3 packages to choose from: SC70-5, SOT23-5 and SOIC-8
  • 12 circuit configurations to choose from: Noninverting, Inverting, Active Filters, Difference Amp, Comparator and more!
  • Dual and single supply configurations
  • PCB designed for High performance: Optimized for each function
  • Multiple interface options (...)
View details
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 (...)

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Design tools & simulation

SIMULATION MODELS Download
SBOM775A.ZIP (4 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOM776A.ZIP (127 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMAQ3.ZIP (3 KB) - PSpice 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
  • (...)
View details
DESIGN TOOLS Download
Low-side, bidirectional current-sensing circuit
CIRCUIT060007 — This single-supply low-side, bidirectional current sensing solution can accurately detect load currents from –1A to 1A. The linear range of the output is from 110mV to 3.19V. Low-side current sensing keeps the common-mode voltage near ground, and is thus most useful in applications with large (...)
document-generic User guide
Features
  • Single 5V supply with half-supply reference
  • Input: -2.22mV to 2.27mV differential
  • Output: 225mV - 4.72V 
  • Strain gauge resistance variation: 115 - 125 Ohms 
  • Gain: 1001V/V
View details
DESIGN TOOLS Download
SBOC500.ZIP (297 KB)

Reference designs

REFERENCE DESIGNS Download
Wireless IoT, Bluetooth® Low Energy, 4½ Digit, 100kHz True RMS Digital Multimeter
TIDA-01012 — Many products are now becoming connected through the Internet of Things (IoT), including test equipment such as digital multimeters (DMM).  Enabled by Texas Instruments’ SimpleLink™ ultra-low power wireless microcontroller (MCU) platform, the TIDA-01012 reference design demonstrates (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Enhanced Accuracy Battery Fuel Gauge Reference Design for Low Power Industrial IoT Field Metering
TIDA-01014 — The Internet of Things (IoT) revolution is efficiently connecting applications and instruments, enabling battery powered, wide scale very low power sensor deployment.  New technologies, such as TI’s advanced sensor and low power connectivity devices, are enabling these instruments to be (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Data Acquisition Block for ECG Systems, discrete LEAD I ECG implementation Reference Design
TIPD116 — This TI Verified Design is for Electrocardiography (ECG), the measurement of the electrical activity of the heart, a method that requires a precision analog front end instrumentation gain stage, filtering, and high resolution digital conversion. This design features the methodology for achieving a (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Single Supply Op Amp with Drive to True GND
TIPD145 — Single supply rail-to-rail amplifiers are commonly used in analog systems.  In some cases it is important to have an amplifier output that drives very close to GND (i.e. a few microvolts).  However, no amplifier can inherently drive this close to GND.  This TI Precision Design shows a (...)
document-generic Schematic document-generic User guide
Design files
View details
REFERENCE DESIGNS Download
Level Translation: Dual to Single Supply Amp, ±15V to 5V
TIPD148 — Translating a ±15V signal to a single supply 5V signal for use with an ADC is a common circuit requirement.  This Dual Supply to Single Supply Amplifier circuit design translates a ±15V signal to a 0V to 5V signal.  The output of this design will not be outside of 0-5V (...)
document-generic Schematic document-generic User guide
Design files
View details
REFERENCE DESIGNS Download
Data Acquisition at 1KHz AC, 1mW, 18bit, 1Msps Reference Design
TIPD114 — This TI Verified Design provides results of a low power, low throughput use case of ADS8881. One of the ways to reduce power for a low throughput application is to select a high throughput (1 MSPS) part and run it at low speed. The power consumed by ADS8881 is 55uW for 10kSPS. The reference drive (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 5 View options
SOT-23 (DBV) 5 View options

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Training series

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Videos

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Get the backstory on why we created TI Precision Labs, the industry's first online classroom for analog design, from op amp expert Art Kay.

Posted: 27-Jan-2015
Duration: 01:48

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