Product details


Architecture FET / CMOS Input, Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.2 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 GBW (Typ) (MHz) 50 BW @ Acl (MHz) 50 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 25 Vn at flatband (Typ) (nV/rtHz) 4.5 Vn at 1 kHz (Typ) (nV/rtHz) 4.5 Iq per channel (Typ) (mA) 4.6 Vos (offset voltage @ 25 C) (Max) (mV) 0.2 Rail-to-rail In, Out Features Zero Crossover Rating Catalog Operating temperature range (C) -40 to 125 CMRR (Typ) (dB) 120 Input bias current (Max) (pA) 10 Offset drift (Typ) (uV/C) 1 Output current (Typ) (mA) 65 2nd harmonic (dBc) 81 3rd harmonic (dBc) 93 @ MHz 1 open-in-new Find other High-speed op amps (GBW>=50MHz)

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other High-speed op amps (GBW>=50MHz)


  • Gain Bandwidth: 50 MHz
  • Zerø-Crossover Distortion Topology:
    • Excellent THD+N: 0.0004%
    • CMRR: 100 dB (Minimum)
    • Rail-to-Rail Input and Output
      • Input 100 mV Beyond Supply Rail
  • Low Noise: 4.5 nV/√Hz at 100 kHz
  • Slew Rate: 25 V/µs
  • Fast Settling: 0.3 µs to 0.01%
  • Precision:
    • Low Offset: 100 µV
    • Low Input Bias Current: 0.2 pA
  • 2.2-V to 5.5-V Operation

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open-in-new Find other High-speed op amps (GBW>=50MHz)


The OPAx365 zerø-crossover series, rail-to-rail, high-performance, CMOS operational amplifiers are optimized for very low voltage, single-supply applications. Rail-to-rail input or output, low-noise (4.5 nV/√Hz) and high-speed operation (50-MHz Gain Bandwidth) make these devices ideal for driving sampling analog-to-digital converters (ADCs). Applications include audio, signal conditioning, and sensor amplification. The OPA365 family of op amps are also well-suited for cell phone power amplifier control loops.

Special features include an excellent common-mode rejection ratio (CMRR), no input stage crossover distortion, high input impedance, and rail-to-rail input and output swing. The input common-mode range includes both the negative and positive supplies. The output voltage swing is within 10 mV of the rails.

The OPA365 (single version) is available in the micro-size SOT23-5 (SOT-5) and SOIC-8 packages. The OPA2365 (dual version) is offered in the SOIC-8 package. All versions are specified for operation from −40°C to +125°C. Single and dual versions have identical specifications for maximum design flexibility.

open-in-new Find other High-speed op amps (GBW>=50MHz)
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Same functionality and pinout but is not an equivalent to the compared device:
NEW OPA607 ACTIVE Low power, precision, 50 MHz decompensated CMOS operational amplifier This device has lower power (0.9 mA), lower noise (3.8 nV/rtHz) and lower drift(0.35uV/C)

Technical documentation

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Type Title Date
* Datasheet OPAx365 50-MHz, Zerø-Crossover, Low-Distortion, High CMRR, RRI/O, Single-Supply Operational Amplifier datasheet (Rev. F) Mar. 30, 2020
Application notes Increase Measurement Accuracy With HS Amps for Low-Side Shunt Current Monitoring (Rev. A) Aug. 26, 2019
Application notes Inverting circuit for high-to-low voltage level translation to drive ADC Jun. 15, 2019
Application notes Driving a low-voltage single-ended SAR ADC circuit with high-voltage input Jun. 10, 2019
Application notes Antialiasing filter circuit design for single-ended ADC input using fixed cutoff (Rev. A) Mar. 07, 2019
Application notes AN-31 amplifier circuit collection (Rev. C) Mar. 04, 2019
Application notes PWM generator circuit (Rev. A) Feb. 01, 2019
Application notes Circuit for differential output from a single-ended precision DAC Jan. 28, 2019
Technical articles How to reduce distortion in high-voltage, high-frequency signal generation for AWGs Oct. 30, 2018
Technical articles What are the advantages of using JFET-input amplifiers in high-speed applications? Jun. 18, 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
Application notes Zero-crossover Amplifiers: Features and Benefits (Rev. A) Feb. 09, 2017
More literature The Best of Baker's Best – Amplifiers eBook Jan. 14, 2014
Application notes Low Power Input and Reference Driver Circuit for ADS8318 and ADS8319 Jun. 24, 2009

Design & development

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

Hardware development

document-generic User guide
The ADS7049-Q1EVM-PDK is a platform for evaluating the performance of the ADS7049-Q1 SAR ADC, which is a single-ended input, 12-bit, 2-MSPS device. The valuation kit includes the ADS7049-Q1 EVM board and the precision host interface (PHI) controller board that enables the accompanying computer (...)
  • Hardware and software required for diagnostic testing as well as accurate performance evaluation of the ADS7049-Q1 SAR ADC 
  • No external power supply necessary. 
  • USB powered—no external power supply is required. 
  • The PHI controller that provides a convenient communication interface to the ADS7049-Q1 ADC (...)

Design tools & simulation

SBOC133.ZIP (3 KB) - PSpice Model
SBOC134A.TSC (66 KB) - TINA-TI Reference Design
SBOM203.TSM (5 KB) - TINA-TI Spice Model
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
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 (...)
  • 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
  • (...)
Voltage Divider Determines A Set of Resistors for a Voltage Divider
VOLT-DIVIDER-CALC VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.


SBAM419.ZIP (22 KB)
SBOC552.ZIP (7 KB)

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Design files
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CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 5 View options

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