Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers
Operational amplifiers (op-amps), instrumentation amplifiers, and buffer amplifiers are the workhorses of analog signal conditioning — providing gain, filtering, impedance transformation, and differential measurement in sensor interfaces, audio systems, and control loops. With 16,800+ parts from ADI (AD, ADA, LT), TI (OPA, TLV, LMV), STMicroelectronics, ROHM, and Microchip, Octatronics supports selection by GBW, slew rate, input offset voltage, noise, supply current, and CMRR.
Product Series & Base Models
150 model families directly associated with Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers. Browse the full catalog with search and filters.
Browse Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers Products
| PART NUMBER | MANUFACTURER | DESCRIPTION | STOCK | QTY / ACTION |
|---|---|---|---|---|
| EL5244CS | Renesas | IC VOLTAGE FEEDBACK 2 CIRC 8SOIC | 20,294 | |
| EL5146CS-T13 | Renesas | IC VOLTAGE FEEDBACK 1 CIRC 8SOIC | 20,520 | |
| EL2141CS | Renesas | IC OPAMP DIFF 1 CIRCUIT 8SOIC | 25,757 | |
| NCV333ASQ3T2G | onsemi | IC OPAMP ZERO-DRIFT 1 CIRC SC88A | 22,094 | |
| NCS333ASQ3T2G | onsemi | IC OPAMP ZERO-DRIFT 1 CIRC SC88A | 22,428 | |
| THS4500IDGK | Texas Instruments | IC OPAMP DIFF 1 CIRCUIT 8VSSOP | 32,491 | |
| THS4225DGN | Texas Instruments | IC OPAMP VFB 1 CIRCUIT 8HVSSOP | 42,509 | |
| THS4225D | Texas Instruments | IC VOLTAGE FEEDBACK 1 CIRC 8SOIC | 44,792 | |
| THS4151CD | Texas Instruments | IC OPAMP DIFF 1 CIRCUIT 8SOIC | 39,014 | |
| THS4140CDGN | Texas Instruments | IC OPAMP DIFF 1 CIRCUIT 8HVSSOP | 33,637 |
Top Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers Manufacturers
onsemi
onsemi Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
28,226 productsRenesas
Renesas Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
74,605 productsNisshinbo Micro Devices Inc.
Nisshinbo Micro Devices Inc. Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
122 productsFairchild Semiconductor
Fairchild Semiconductor Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
11 products
NXP Semiconductors
NXP Semiconductors Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
20,288 products
Microchip Technology
Microchip Technology Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
67,462 products
Texas Instruments
Texas Instruments Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
84,045 products
Diodes Incorporated
Diodes Incorporated Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
16,703 products
Analog Devices
Analog Devices Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
82,970 products
STMicroelectronics
STMicroelectronics Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers products are available for part-number review, stock checks, and RFQ support.
19,050 productsAbout Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers
Operational Amplifiers (Op-Amps), Instrumentation Amplifiers, and Buffer Amplifiers are the fundamental building blocks of analog circuit design, providing high-impedance input amplification, mathematical integration, and impedance matching. Op-amps are highly versatile voltage-amplifying devices; instrumentation amplifiers combine multiple op-amps to provide extreme common-mode rejection for weak differential sensor signals; and buffer amplifiers provide unity-gain impedance isolation.
Key selection categories include precision op-amps for low-drift instrumentation, high-speed op-amps for RF signal paths, low-noise op-amps for audio systems, and low-power/nanopower op-amps for battery-operated IoT nodes. Engineers evaluate these devices based on gain-bandwidth product (GBW), input offset voltage (Vos), input bias current, slew rate, noise density (nV/rtHz), common-mode rejection ratio (CMRR), and package configuration (single, dual, or quad channels).
Browse Octatronics to search and compare amplifiers from industry pioneers including Analog Devices (OP, AD, and LT series), Texas Instruments (OPA, TL, and LMV series), STMicroelectronics, onsemi, and Microchip. Access datasheets, download SPICE models, and submit bulk RFQs online.
Related Applications
Discover industry applications that commonly use Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers components.
Medical & Healthcare
Medical-grade sensors, imaging components, patient monitoring ICs, and FDA-compliant electronic parts.
Patient Monitoring
Wearable and bedside devices for vital signs monitoring.
Aerospace & Defense
Industrial Sensors & Transducers
Proximity sensors, pressure transducers, temperature sensors, and flow meters for industrial process monitoring.
Medical Imaging
High-resolution imaging solutions for CT, MRI, and X-ray.
Fiber Optic Systems
Optical transmitters, receivers, and transimpedance amplifiers for FTTH, GPON, and long-haul optical networks.
Oscilloscopes & Logic Analyzers
High-speed ADCs, FPGA-based signal processors, and precision front-end amplifiers for test instruments.
Power Analyzers & Meters
Precision current sensors, isolated ADCs, and power measurement ICs for energy monitoring instruments.
Drones & UAVs
Flight controllers, ESC drivers, IMU sensors, and GPS modules for commercial and industrial drones.
Test & Measurement
5G Infrastructure
RF power amplifiers, mmWave front-end modules, and beamforming ICs for 5G base stations and small cells.
Satellite & Space Communications
Rad-hard components, high-reliability RF modules, and space-grade power converters for satellite systems.
Spectrum & Network Analyzers
RF downconverters, digital IF processors, and precision frequency synthesizers for RF test equipment.
Signal Generators & Counters
High-performance DACs, direct digital synthesis ICs, and precision timebase circuits for signal generation and frequency measurement.
Communications Equipment
RF components, network processors, optical transceivers, and 5G infrastructure modules.
Consumer & Personal Electronics
Display drivers, audio codecs, touch controllers, USB-C ICs, and fast-charging components for consumer devices.
Frequently Asked Questions
Octatronics can help source a wide range of Operational Amplifiers, Instrumentation Amplifiers and Buffer Amplifiers from major manufacturers worldwide, including active production parts, long-lead-time items, and hard-to-find components.
Yes. You can submit a single part number or upload a BOM with multiple parts. Our team will check stock, date code, lead time, and pricing for each item.
Availability depends on the specific part number and supplier source. For important orders, buyers can request packaging photos, labels, date code information, and traceability documents.
Yes. Octatronics supports sourcing for active, end-of-life, obsolete, and hard-to-find components through our global supplier network.
Please provide the part number, manufacturer, quantity, required date code, target price, delivery country, and whether original packaging or COC is required.
Articles & Technology
View All →Top Semiconductor Companies in 2026: Manufacturers, Foundries, Fabless Firms and IDMs
NVIDIA led semiconductor vendor revenue in 2025, while TSMC dominated pure-play foundry sales. This guide explains why those rankings measure different things—and gives engineers and buyers a practical framework for selecting manufacturers by component category, lifecycle, qualification, and supply risk.
AD629 Alternatives and Equivalents: INA149 vs INA117 vs AD8479
Compare AD629 alternatives INA149, INA117 and AD8479 by common-mode range, CMRR, bandwidth, supply voltage, pinout and package.
Circuit Board Component Identification: How to Identify PCB Components by Markings, Shape, and Codes
Circuit board component identification means recognizing PCB parts by their reference designators, physical appearance, body markings, polarity marks, package type, and electrical function. The fastest way to identify a component is to start with the PCB silkscreen, match the reference letter to a component type, inspect its shape and package, read any value or top marking, then confirm the result with a datasheet, schematic, BOM, or measurement tool. This guide explains how to identify common PCB components such as resistors, capacitors, inductors, diodes, transistors, MOSFETs, ICs, connectors, fuses, relays, crystals, and test points. It also includes practical examples, common marking codes, polarity clues, mistakes to avoid, and a replacement sourcing checklist.
IC Top Marking Codes Explained: How to Identify SMD Chips from Package Markings
IC top marking codes are abbreviated package markings used to identify semiconductor devices, especially small SMD chips that cannot fit a full part number. Buyers should use the marking as a starting point, then verify manufacturer logo, package, pin count, date code, lot code, datasheet, packing label, and supplier documentation. Official manufacturer marking tools and datasheets should be used before relying on third-party SMD code databases.
How to Find Pin-Compatible Alternatives for Obsolete ICs
Finding a pin-compatible alternative for an obsolete IC is not just about matching the package. It requires a structured review of pinout, footprint, electrical parameters, functional behavior, lifecycle status, sourcing reliability, and sample validation.
Pin-to-Pin Replacement Parts: How to Check Compatibility Before Sourcing
When an original electronic component becomes obsolete, unavailable, or too expensive, a pin-to-pin replacement part can help avoid PCB redesign and keep production or repair projects moving. However, pin-to-pin compatibility does not automatically mean the part is a safe drop-in replacement. This guide explains how to check package, footprint, pinout, electrical ratings, thermal performance, timing behavior, firmware requirements, compliance status, and lifecycle risk before sourcing replacement parts. It also provides a practical checklist to help engineers, buyers, and maintenance teams reduce sourcing mistakes and verify compatibility before purchase.
How to Choose Electronic Components for Reliable Hardware Design
Learn how to choose electronic components for reliable hardware design, including specifications, lifecycle status, sourcing risks, quality checks, and BOM optimization.