Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA4348AID

OPA4348AID

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14SOIC

874

AD602SQ/883B

AD602SQ/883B

Analog Devices, Inc.

DUAL VARIABLE GAIN AMPLIFIE

1538

LTC6101HVCHS5#TRMPBF

LTC6101HVCHS5#TRMPBF

Analog Devices, Inc.

IC CURR SENSE 1 CIRCUIT TSOT23-5

0

LT1168ACS8#TRPBF

LT1168ACS8#TRPBF

Analog Devices, Inc.

IC INST AMP 1 CIRCUIT 8SO

0

INA2181A4IDSQR

INA2181A4IDSQR

Texas Instruments

26V, DUAL CHANNEL, BI-DIRECTIONA

3000

OPA2695IRGTT

OPA2695IRGTT

Texas Instruments

IC OPAMP CFA 2 CIRCUIT 16QFN

0

5962-8777101M3A

5962-8777101M3A

Analog Devices, Inc.

IC OPAMP GP 4 CIRCUIT 20CLCC

1

LT6100HDD#PBF

LT6100HDD#PBF

Analog Devices, Inc.

IC CURR SENSE 1 CIRCUIT 8DFN

507

MCP6444-E/SL

MCP6444-E/SL

Roving Networks / Microchip Technology

IC OPAMP GP 4 CIRCUIT 14SOIC

285

TLC272AID

TLC272AID

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

108

HA9P2840-5

HA9P2840-5

WIDEBAND OPERATIONAL AMPLIFIER

1652

TLC2254AQDRG4

TLC2254AQDRG4

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14SOIC

0

LT6600IS8-10#PBF

LT6600IS8-10#PBF

Analog Devices, Inc.

IC OPAMP DIFF 1 CIRCUIT 8SO

483

LMP8640HVMKE-F/NOPB

LMP8640HVMKE-F/NOPB

Texas Instruments

IC CURR SENSE 1 CIRCUIT TSOT23-6

1805

HFA9P0002-9

HFA9P0002-9

OPERATIONAL AMPLIFIER

1708

5962-9080702Q2A

5962-9080702Q2A

Texas Instruments

TLE2061AM EXCALIBUR JFET-INPUT L

0

OPA2890IDGST

OPA2890IDGST

Texas Instruments

IC OPAMP VFB 2 CIRCUIT 10VSSOP

138

ADA4861-3YRZ-RL7

ADA4861-3YRZ-RL7

Analog Devices, Inc.

IC OPAMP CFA 3 CIRCUIT 14SOIC

449

LMH6672MA

LMH6672MA

OPERATIONAL AMPLIFIER, 2 FUNC, 4

0

MAX407EPA

MAX407EPA

Analog Devices, Inc.

IC GP OPAMP 2 CIRCUIT 8DIP

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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