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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 Vos (offset voltage @ 25 C) (Max) (mV) 0.15 GBW (Typ) (MHz) 20 Slew rate (Typ) (V/us) 10 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 1.5 Iq per channel (Typ) (mA) 1.5 Vn at 1 kHz (Typ) (nV/rtHz) 8.5 CMRR (Typ) (dB) 114 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 0.9 Output current (Typ) (mA) 65 Features EMI Hardened, Shutdown, Zero Crossover Architecture CMOS open-in-new Find other Precision op amps (Vos<1mV)

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other Precision op amps (Vos<1mV)

Features

  • Precision with Zero-Crossover Distortion:
    • Low Offset Voltage: 150 µV (Maximum)
    • High CMRR: 114 dB
    • Rail-to-Rail I/O
  • Low Input Bias Current: 0.9 pA (Maximum)
  • Low Noise: 7 nV/√Hz at 10 kHz
  • Wide Bandwidth: 20 MHz
  • Slew Rate: 10 V/µs
  • Quiescent Current: 1.45 mA/Ch
  • Single-Supply Voltage Range: 1.8 V to 5.5 V
  • OPA320S and OPA2320S:
    • IQ in Shutdown Mode: 0.1 µA
  • Unity-Gain Stable
  • Small Packages:
    • SOT-23, VSSOP, SON, and SOIC
open-in-new Find other Precision op amps (Vos<1mV)

Description

The OPA320 (single) and OPA2320 (dual) are a new generation of precision, low-voltage CMOS operational amplifiers optimized for very low noise and wide bandwidth while operating on a low quiescent current of only 1.45 mA.

The OPA320 series is ideal for low-power, single- supply applications. Low-noise (7 nV/√Hz) and high- speed operation also make them well-suited for driving sampling analog-to-digital converters (ADCs). Other applications include signal conditioning and sensor amplification.

The OPA320 features a linear input stage with zero- crossover distortion that delivers excellent common- mode rejection ratio (CMRR) of typically 114 dB over the full input range. The input common mode range extends 100 mV beyond the negative and positive supply rails. The output voltage typically swings within 10 mV of the rails.

In addition, the OPAx320 has a wide supply voltage range from 1.8 V to 5.5 V with excellent PSRR (106 dB) over the entire supply range, making them suitable for precision, low-power applications that run directly from batteries without regulation.

The OPA320 (single version) is available in a 5-pin SOT23 package; the OPA320S shutdown single version is available in an 6-pin SOT23 package. The dual OPA2320 is offered in 8-pin SOIC, VSSOP, and SON packages, and the OPA2320S (dual with shutdown) in a 10-pin VSSOP package.

open-in-new Find other Precision op amps (Vos<1mV)
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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet OPAx320x Precision, 20-MHz, 0.9-pA, Low-Noise, RRIO, CMOS Operational Amplifier With Shutdown datasheet (Rev. F) Dec. 16, 2016
Application notes Cascading Precision Op Amp Stages for Optimal AC and DC Performance Aug. 17, 2020
Application notes EMI-Hardened Op Amps Reduce Errors in Infusion Pumps (Rev. A) Aug. 21, 2019
Application notes Circuit to drive a switched capacitor reference input for high-precision devices Jun. 17, 2019
Application notes Charge pump circuit (–0.3V) for negative amplifier supply Jun. 16, 2019
Application notes Noninverting circuit for high-to-low voltage level translation to drive ADC Jun. 16, 2019
Application notes Powering a dual-supply op amp circuit with one LDO (Rev. A) Mar. 07, 2019
Application notes Single-supply, low-side, unidirectional current-sensing solution (Rev. A) Feb. 01, 2019
Application notes Difference amplifier (subtractor) circuit (Rev. A) Jan. 31, 2019
Application notes Circuit for differential output from a single-ended precision DAC Jan. 28, 2019
Application notes High-voltage battery monitor circuit: ±20V, 0–10kHz, 18-bit fully differential (Rev. A) Jan. 23, 2019
Application notes Multichannel Analog Input Modules for PLC Equipment Jan. 04, 2019
White papers Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. C) Nov. 30, 2018
Application notes Single-ended to differential using a two op-amp circuit Oct. 08, 2018
Application notes High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit Dec. 22, 2017
White papers Charging stations: Toward an EV support infrastructure May 09, 2017
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Application notes Zero-crossover Amplifiers: Features and Benefits (Rev. A) Feb. 09, 2017
Technical articles Pile on to a charger – my EV needs power Dec. 20, 2016
User guides Software Pacemaker Detection Design Guide Dec. 03, 2015
Technical articles Minimize your current, pick a sweet spot! Sep. 03, 2014
Technical articles A plethora of puzzling op amp puzzles Jan. 29, 2014
Technical articles What’s the difference between macro models and behavioral models? Dec. 23, 2013
Application notes OPA320, OPA320S, OPA2320, OPA2320S EMI Immunity Performance May 24, 2013

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
149
Description

The ADS8168 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS8168 successive-approximation register (SAR) analog-to-digital converter (ADC). The ADS8168EVM-PDK includes the ADS8168EVM board, the precision host interface (PHI (...)

Features
  • Includes hardware and software required for diagnostic testing, as well as accurate performance of the ADS8168 ADC
  • No external power supply required
  • Ships with PHI controller that provides a convenient interface to ADS8168EVM over USB 2.0 (or higher) for power delivery, as well as digital input/output
  • (...)
EVALUATION BOARDS Download
document-generic User guide
149
Description

The ADS8332 evaluation module (EVM) performance demonstration kit (PDK) is a platform for evaluating the performance of the ADS8332 successive-approximation register (SAR) analog-to-digital converter (ADC). ADS8332EVMV2-PDK includes the ADS8332EVMV2 board, the precision host interface (PHI (...)

Features
  • Includes hardware and software required for diagnostic testing, as well as accurate performance evaluation of the ADS8332 ADC
  • No external power supply required
  • Ships with PHI controller that provides convenient communication interface to ADS8332EVM over USB 2.0 (or higher) for power delivery, as (...)
EVALUATION BOARDS Download
document-generic User guide
10
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
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 (...)
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 (...)

EVALUATION BOARDS Download
document-generic User guide
499
Description

PLABS-SAR-EVM-PDK is an experimental platform used in conjunction with TI Precision Labs videos to gain a deeper understanding of successive approximation register (SAR) analog-to-digital converter (ADC) circuits. The evaluation module (EVM) platform contains two channels for common SAR (...)

Features
  • Intuitive setup – PCB overlay shows the schematic
  • No external power supply required
  • Includes several coupon boards with different driving amplifier RC filters to facilitate experimentation
  • Ships with PHI controller - provides convenient interface to EVM over USB 2.0 (or higher) for power delivery (...)
EVALUATION BOARDS Download
document-generic User guide
999
Description
The Vienna rectifier power topology is used in high power three phase power factor (AC-DC) applications such as off-board electric vehicle (EV) chargers and telecom rectifiers. This design illustrates how to control the power stage using C2000™ MCUs. This design uses an HSEC180 controlCARD (...)
Features

Hardware Features

  • EVM with interface to accept HSEC180 controlCARDs
  • Greater than 98% peak efficiency
  • Less than 2% THD at full load and low line
  • Up to 2.4KW design with three phase 400Vac VL-L Input
  • Hardware Files are in DigitalPower SDK at solutions (...)

Software development

SUPPORT SOFTWARE Download
SBAC193A.ZIP (75 KB)

Design tools & simulation

SIMULATION MODELS Download
SBOM437E.ZIP (14 KB) - PSpice Model
SIMULATION MODELS Download
SBOM438E.ZIP (9 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOM439E.TSC (979 KB) - TINA-TI Reference Design
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
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
  • (...)
CALCULATION TOOLS Download
Noise Calculator, Generator and Examples
OPAMP-NOISECALC This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:
  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data (...)
DESIGN TOOLS Download
Single-supply, low-side, unidirectional current-sensing circuit
CIRCUIT060001 — This single–supply, low–side, current sensing solution accurately detects load current up to 1A and converts it to a voltage between 50mV and 4.9V. The input current range and output voltage range can be scaled as necessary and larger supplies can be used to accommodate larger swings.
document-generic User guide
Features
  • Senses Temperature between 25°C - 50°C 
  • Output: 0.05V - 3.25V 
  • Single 3.3V Supply with half-supply reference
DESIGN TOOLS Download
Temperature sensing with NTC thermistor circuit
CIRCUIT060002 — This temperature sensing circuit uses a resistor in series with a negative–temperature–coefficient (NTC) thermistor to form a voltage divider, which has the effect of producing an output voltage that is linear over temperature. The circuit uses an op amp in a non–inverting (...)
document-generic User guide
Features
  • Senses Temperature between 25°C - 50°C 
  • Output: 0.05V - 3.25V 
  • Single 3.3V Supply with half-supply reference
DESIGN TOOLS Download
Temperature sensing with PTC thermistor circuit
CIRCUIT060003 — This temperature sensing circuit uses a resistor in series with a positive–temperature–coefficient (PTC) thermistor to form a voltage–divider, which has the effect of producing an output voltage that is linear over temperature. The circuit uses an op amp in a non–inverting (...)
document-generic User guide
Features
  • Senses Temperature between 0°C - 50°C 
  • Output: 0.05V - 3.25V 
  • Single 3.3V Supply with half-supply reference
DESIGN TOOLS Download
Low-noise and long-range PIR sensor conditioner circuit
CIRCUIT060004 — This two stage amplifier design amplifies and filters the signal from a passive infrared (PIR) sensor. The circuit includes multiple low–pass and high–pass filters to reduce noise at the output of the circuit to be able to detect motion at long distances and reduce false triggers. This (...)
document-generic User guide
Features
  • Single 5V Supply 
  • Passes frequencies between 0.7Hz - 10Hz 
  • AC Gain: 90dB
DESIGN TOOLS Download
High-side current sensing with discrete difference amplifier circuit
CIRCUIT060005 — This single–supply, high–side, low–cost current sensing solution detects load current between 50mA and 1A and converters it to an output voltage from 0.25V to 5V. High–side sensing allows for the system to identify ground shorts and does not create a ground disturbance on the load.
document-generic User guide
Features
  • Single 36V supply 
  • Input: 50mA to 1A 
  • Output: 0.25V to 5V
DESIGN TOOLS Download
Bridge amplifier circuit
CIRCUIT060006 — A strain gauge is a sensor whose resistance varies with applied force. To measure the variation in resistance, the strain gauge is placed in a bridge configuration. This design uses a 2 op amp instrumentation circuit to amplify a differential signal created by the change in resistance of a strain (...)
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
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
DESIGN TOOLS Download
Full-wave rectifier circuit
CIRCUIT060008 — This absolute value circuit can turn alternating current (AC) signals to single polarity signals. This circuit functions with limited distortion for ±10-V input signals at frequencies up to 50kHz and for signals as small as ±25mV at frequencies up to 1kHz.
document-generic User guide
Features
  • 30V Split supply with ground reference 
  • Input: +/-25mV to +/-10V 
  • Output: 25mV to 10V
DESIGN TOOLS Download
Half-wave rectifier circuit
CIRCUIT060009 — The precision half-wave rectifier inverts and transfers only the negative-half input of a time varying input signal (preferably sinusoidal) to its output. By appropriately selecting the feedback resistor values, different gains can be achieved. Precision half-wave rectifiers are commonly used with (...)
Features
  • 5V Split supply 
  • Input: +/-0.2mVpp to +/-4Vpp 
  • Output: 0.1V to 2V
DESIGN TOOLS Download
PWM generator circuit
CIRCUIT060010 — This circuit utilizes a triangle wave generator and comparator to generate a 500 kHz pulse-width modulated (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. An op amp and comparator generate a triangle waveform which is applied to the inverting input of a second (...)
document-generic User guide
Features
  • 5V Single supply with half-supply reference 
  • Input: -2V to 2V 
  • Output: 0V to 5V
DESIGN TOOLS Download
SBAM419.ZIP (22 KB)
DESIGN TOOLS Download
SBOC495.ZIP (12 KB)
DESIGN TOOLS Download
SBOC499.ZIP (376 KB)
SCHEMATICS Download
TIDCAP1.ZIP (795 KB)

Reference designs

Many TI reference designs include the OPA320 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options
SOT-23 (DBV) 6 View options

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