Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA2634U

OPA2634U

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 2 CIRC 8SOIC

29715

OPA501AM

OPA501AM

Burr-Brown (Texas Instruments)

IC POWER AMP 1 CIRCUIT TO3-8

1315

OPA4131NJG4

OPA4131NJG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 4 CIRCUIT 14SOIC

0

OPA4743EA

OPA4743EA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

1480

INA2141P

INA2141P

Burr-Brown (Texas Instruments)

INSTRUMENTATION AMPLIFIER

3985

OPA4658U/2K5

OPA4658U/2K5

Burr-Brown (Texas Instruments)

IC CFA 4 CIRCUIT 14SOIC

3959

OPA4130UAE4

OPA4130UAE4

Burr-Brown (Texas Instruments)

IC GP OPAMP 4 CIRCUIT 14SOIC

150

INA110KPG4

INA110KPG4

Burr-Brown (Texas Instruments)

IC INST AMP 1 CIRCUIT 16DIP

0

OPA680P

OPA680P

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8DIP

5284

INA2128P

INA2128P

Burr-Brown (Texas Instruments)

INSTRUMENTATION AMPLIFIER

1276

INA157UG4

INA157UG4

Burr-Brown (Texas Instruments)

HIGH-SPEED, PRECISION DIFFERENCE

0

BUF04701AIPW

BUF04701AIPW

Burr-Brown (Texas Instruments)

BUFFER AMPLIFIER, 4 FUNC PDSO14

1977

OPA606LM

OPA606LM

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT TO99-8

6798

OPA681P

OPA681P

Burr-Brown (Texas Instruments)

IC CFA 1 CIRCUIT 8DIP

5967

OPA642PB

OPA642PB

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8DIP

0

OPA337PA

OPA337PA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

70584

OPA743PA

OPA743PA

Burr-Brown (Texas Instruments)

IC CMOS 1 CIRCUIT 8DIP

54625

OPA4345UA/2K5

OPA4345UA/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

862

OPA3680U/2K5

OPA3680U/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

15000

OPA4336PA

OPA4336PA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

2489

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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