Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
AD8531ART-REEL

AD8531ART-REEL

Analog Devices, Inc.

IC GP OPAMP 1 CIRCUIT SOT23-5

701550

AD745SQ

AD745SQ

Analog Devices, Inc.

OP AMP,2000UV OFFSET-MAX

1110

AD8476BCPZ-WP

AD8476BCPZ-WP

Analog Devices, Inc.

OPERATIONAL AMPLIFIER, 900UV OFF

830

LT6005HGN#PBF

LT6005HGN#PBF

Analog Devices, Inc.

IC OPAMP GP 4 CIRCUIT 16SSOP

119

LTC6090HFE-5#PBF

LTC6090HFE-5#PBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT 16TSSOP

55

LT6004CMS8#TRPBF

LT6004CMS8#TRPBF

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT 8MSOP

0

AD745JRZ-16

AD745JRZ-16

Analog Devices, Inc.

IC OPAMP JFET 1 CIRCUIT 16SOIC

46

AD842SH

AD842SH

Analog Devices, Inc.

IC GP OPAMP 1 CIRCUIT TO8-12

2001

AD8051ARZ

AD8051ARZ

Analog Devices, Inc.

IC OPAMP VFB 1 CIRCUIT 8SOIC

336

AD8295ACPZ-WP

AD8295ACPZ-WP

Analog Devices, Inc.

IC INST AMP 3 CIRCUIT 16LFCSP

814

AD8079BR-REEL

AD8079BR-REEL

Analog Devices, Inc.

IC BUFFER 2 CIRCUIT 8SOIC

5000

LTC2052HVCS#PBF

LTC2052HVCS#PBF

Analog Devices, Inc.

IC OPAMP ZERO-DRIFT 4 CIRC 14SO

1950

LTC6268IS8#TRPBF

LTC6268IS8#TRPBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT 8SO

0

AD8632ARZ

AD8632ARZ

Analog Devices, Inc.

IC GP OPAMP 2 CIRCUIT 8SOIC

5140

AD8042AR-REEL7

AD8042AR-REEL7

Analog Devices, Inc.

IC VOLTAGE FEEDBACK 2 CIRC 8SOIC

1455

LT1819IMS8#PBF

LT1819IMS8#PBF

Analog Devices, Inc.

IC OPAMP VFB 2 CIRCUIT 8MSOP

429

AD604AR

AD604AR

Analog Devices, Inc.

IC VARIABLE GAIN 2 CIRC 24SOIC

6579

MAX4075BEESA

MAX4075BEESA

Analog Devices, Inc.

IC GP OPAMP 2 CIRCUIT 8SOIC

5087

MAX473ESA+

MAX473ESA+

Analog Devices, Inc.

0MHZ SINGLE-SUPPLY OP AMP

2105

LT1804IS8#PBF

LT1804IS8#PBF

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT 8SO

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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