Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA704UA

OPA704UA

Burr-Brown (Texas Instruments)

OPA704 SINGLE 12V, 3MHZ CMOS, RA

16676

OPA2631U

OPA2631U

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 2 CIRC 8SOIC

3000

INA141UAG4

INA141UAG4

Burr-Brown (Texas Instruments)

IC INST AMP 1 CIRCUIT 8SOIC

0

INA118UG4

INA118UG4

Burr-Brown (Texas Instruments)

INA118 PRECISION, LOW POWER INST

40

OPA104AM

OPA104AM

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT TO99-8

776

OPA131PJ

OPA131PJ

Burr-Brown (Texas Instruments)

IC OPAMP JFET 1 CIRCUIT 8DIP

0

OPA2681N/2K5

OPA2681N/2K5

Burr-Brown (Texas Instruments)

IC CFA 2 CIRCUIT 14SOIC

0

OPA2677UG4

OPA2677UG4

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

150

OPA404SG-BB

OPA404SG-BB

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

81

OPA121KM

OPA121KM

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT TO99-8

8214

OPA4343EA/250G4

OPA4343EA/250G4

Burr-Brown (Texas Instruments)

IC GP OPAMP 4 CIRCUIT 16SSOP

230

OPA4703UA/2K5

OPA4703UA/2K5

Burr-Brown (Texas Instruments)

IC CMOS 4 CIRCUIT 14SOIC

0

OPA2680U

OPA2680U

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 2 CIRC 8SOIC

8903

OPA2132UG4

OPA2132UG4

Burr-Brown (Texas Instruments)

OPA2132 HIGH SPEED FET-INPUT OPE

127

OPA2131PJ

OPA2131PJ

Burr-Brown (Texas Instruments)

IC GP OPAMP 2 CIRCUIT 8DIP

0

INA2132UAG4

INA2132UAG4

Burr-Brown (Texas Instruments)

IC INST AMP 1 CIRCUIT 14SOIC

0

OPA643N/250

OPA643N/250

Burr-Brown (Texas Instruments)

IC VOLT FEEDBACK 1CIRC SOT23-5

0

OPA4345UA

OPA4345UA

Burr-Brown (Texas Instruments)

OPA4345 LOW POWER, SINGLE-SUPPLY

2819

INA131AP-1

INA131AP-1

Burr-Brown (Texas Instruments)

IC INST AMP 1 CIRCUIT 8DIP

11972

OPA2111SM

OPA2111SM

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

0

Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

1. Overview

Linear amplifiers are analog ICs that process continuous signals with high fidelity. This category includes instrumentation amplifiers (In-Amps), operational amplifiers (OP Amps), and buffer amplifiers. They are critical in signal conditioning, filtering, and voltage amplification across electronics, medical devices, and industrial systems.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Instrumentation AmplifiersHigh CMRR, low offset voltage, fixed/gain-programmableSensor bridges, medical instrumentation, precision data acquisition
Operational AmplifiersVoltage feedback, high gain, configurable circuitsActive filters, integrators, comparators, audio amplifiers
Buffer AmplifiersHigh input impedance, unity gain, drive capabilityADC drivers, signal isolation, impedance matching

3. Structure and Composition

Typical IC construction includes: - Differential Input Stage: Bipolar/JFET transistors for high impedance - Gain Stage: Cascoded amplification with laser-trimmed resistors - Output Stage: Class AB push-pull for low distortion - Protection Circuits: ESD protection, thermal shutdown Packaged in 8-20 pin configurations (SOIC, TSSOP, QFN).

4. Key Technical Specifications

ParameterImportance
Gain Bandwidth Product (GBP)Determines frequency response capability
Input Offset Voltage (Vos)Impacts DC precision in low-level signal amplification
Slew Rate (SR)Defines maximum signal transition speed
Common-Mode Rejection Ratio (CMRR)Measures noise/interference immunity
Quiescent Current (Iq)Impacts power efficiency in battery applications

5. Application Fields

  • Medical: ECG machines, blood analyzers
  • Industrial: PLCs, strain gauge interfaces
  • Consumer: Audio preamplifiers, sensor hubs
  • Telecom: Fiber optic transimpedance amplifiers
  • Automotive: Battery management system sensors

6. Leading Manufacturers and Products

ManufacturerProduct Highlights
Analog DevicesAD8221 (Instrumentation Amp), OP1177 (Precision OP Amp)
TILM741 (Classic OP Amp), INA128 (Low-power In-Amp)
STMicroelectronicsTSV912 (Rail-to-Rail OP Amp), LMV358 (Low-voltage Buffer)
MaximMAX4463 (Audio Buffer), MAX41460 (High-speed OP Amp)

7. Selection Guidelines

Key considerations: - Bandwidth vs. power consumption trade-off - Required CMRR in noisy environments - Rail-to-rail output for low-voltage systems - Temperature stability in industrial applications - Cost-sensitive vs. precision design priorities

8. Industry Trends

Future directions include: - Sub-1V operation for IoT devices - Integration with digital calibration (smart amplifiers) - GaN/SiC-based amplifiers for high-voltage applications - AI-driven parameter optimization tools - Automotive-grade amplifiers for ADAS systems

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