Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA2347EA/3KG4

OPA2347EA/3KG4

Texas Instruments

IC OPAMP GP 2 CIRCUIT SOT23-8

0

LM258DRG3

LM258DRG3

Texas Instruments

LM258 DUAL STANDARD, INDUSTRIAL-

4346

TLV2404CPWG4

TLV2404CPWG4

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14TSSOP

0

THS4130IDGNR

THS4130IDGNR

Texas Instruments

IC OPAMP DIFF 1 CIRCUIT 8MSOP

3209

TLV2472CDR

TLV2472CDR

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

2013

TLC271IDR

TLC271IDR

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8SOIC

1496

LM358H/NOPB

LM358H/NOPB

Texas Instruments

IC OPAMP GP 2 CIRCUIT TO5-8

50010000

OPA637SM

OPA637SM

Texas Instruments

IC OPAMP GP 1 CIRCUIT TO99-8

76

INA191A2IYFDR

INA191A2IYFDR

Texas Instruments

IC CURR SENSE 1 CIRCUIT 6DSBGA

2446

TLV274IPWR

TLV274IPWR

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14TSSOP

5159

OPA145IDGKR

OPA145IDGKR

Texas Instruments

IC OPAMP JFET 1 CIRCUIT 8VSSOP

0

OPA2353EA/2K5G4

OPA2353EA/2K5G4

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8VSSOP

0

INA321EA/2K5

INA321EA/2K5

Texas Instruments

IC INST AMP 1 CIRCUIT 8VSSOP

10277

OPA541BM

OPA541BM

Texas Instruments

IC OPAMP POWER 1 CIRCUIT TO3-8

13

TLV2170IDR

TLV2170IDR

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

3933

PGA281AIPW

PGA281AIPW

Texas Instruments

IC OPAMP PGA 1 CIRCUIT 16TSSOP

1894

LM218IDRQ1

LM218IDRQ1

Texas Instruments

IC GP OPAMP 1 CIRCUIT 8SOIC

9850

NE5534IP

NE5534IP

Texas Instruments

OPERATIONAL AMPLIFIER

850

TL064CPWE4

TL064CPWE4

Texas Instruments

IC OPAMP JFET 4 CIRCUIT 14TSSOP

0

INA2180A1QDGKRQ1

INA2180A1QDGKRQ1

Texas Instruments

IC CURR SENSE 2 CIRCUIT 8VSSOP

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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