Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA2137UA/2K5

OPA2137UA/2K5

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

2500

LP324PW

LP324PW

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14TSSOP

1340

OPA131UA/2K5

OPA131UA/2K5

Texas Instruments

OPA131 GENERAL PURPOSE FET-INPUT

16975

OPA695ID

OPA695ID

Texas Instruments

IC OPAMP CFA 1 CIRCUIT 8SOIC

3432

OPA1641AIDGKT

OPA1641AIDGKT

Texas Instruments

IC AUDIO 1 CIRCUIT 8VSSOP

1716

LM348N/NOPB

LM348N/NOPB

Texas Instruments

OPERATIONAL AMPLIFIER

0

INA331IDGKT

INA331IDGKT

Texas Instruments

IC INST AMP 1 CIRCUIT 8VSSOP

1905

TLC4502QD

TLC4502QD

Texas Instruments

TLC4502 ADVANCED LINEPIC SELF-CA

8729

TLC2202ACDR

TLC2202ACDR

Texas Instruments

TLC2202A ADVANCED LINCMOS LOW-NO

4670

OPA4353UAG4

OPA4353UAG4

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14SOIC

0

TLC27M4MJ

TLC27M4MJ

Texas Instruments

OPERATIONAL AMPLIFIER

79

OPA3681U/2K5

OPA3681U/2K5

Texas Instruments

OPERATIONAL AMPLIFIER

22500

OPA564AIDWPR

OPA564AIDWPR

Texas Instruments

IC OPAMP GP 1 CIRCUIT 20SOPWRPAD

3270

AMC1200STDUBRQ1

AMC1200STDUBRQ1

Texas Instruments

AMC1200-Q1 AUTOMOTIVE, 250MV-INP

66

LM324M

LM324M

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14SOIC

4075280

OPA132U

OPA132U

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8SOIC

1329975

TLV8801DBVT

TLV8801DBVT

Texas Instruments

IC OPAMP GP 1 CIRCUIT SOT23-5

1188

TLC27M2BCD

TLC27M2BCD

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

368

OPA345UA

OPA345UA

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8SOIC

13559975

OPA374AIDBVT

OPA374AIDBVT

Texas Instruments

IC OPAMP GP 1 CIRCUIT SOT23-5

10308

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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