Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
AD811SQ/883B

AD811SQ/883B

Analog Devices, Inc.

IC OPAMP CFA 1 CIRCUIT 8CERDIP

71

MAX4100ESA

MAX4100ESA

Analog Devices, Inc.

LOW-POWER OPERATIONAL AMPLIFIER

8329

OP282GS-REEL7

OP282GS-REEL7

Analog Devices, Inc.

DUAL LOW PWR OP AMP IC

358

AD8684ARZ

AD8684ARZ

Analog Devices, Inc.

IC OPAMP JFET 4 CIRCUIT 14SOIC

118

LT6100CMS8#PBF

LT6100CMS8#PBF

Analog Devices, Inc.

IC CURR SENSE 1 CIRCUIT 8MSOP

3283

LT1881IN8#PBF

LT1881IN8#PBF

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT 8DIP

0

LT1395CS6#TRMPBF

LT1395CS6#TRMPBF

Analog Devices, Inc.

IC OPAMP CFA 1 CIRCUIT TSOT23-6

952

MAX4490AUK

MAX4490AUK

Analog Devices, Inc.

RAIL-TO-RAIL OP AMP

422

OP270GP

OP270GP

Analog Devices, Inc.

IC GP OPAMP 2 CIRCUIT 8DIP

32

MAX4174BAEUK

MAX4174BAEUK

Analog Devices, Inc.

R-R, FIXED-GAIN AMPLIFIER

571

MAX4285EUT-T

MAX4285EUT-T

Analog Devices, Inc.

IC BUFFER 1 CIRCUIT SOT23-6

3864

LT6013CDD#TRPBF

LT6013CDD#TRPBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT 8DFN

0

AD8644AR

AD8644AR

Analog Devices, Inc.

IC GP OPAMP 4 CIRCUIT 14SOIC

13103

LTC2057HDD#TRPBF

LTC2057HDD#TRPBF

Analog Devices, Inc.

IC OPAMP ZERO-DRIFT 1 CIRC 8DFN

0

AD8502ARJZ-REEL

AD8502ARJZ-REEL

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT SOT23-8

0

LTC6103IMS8#PBF

LTC6103IMS8#PBF

Analog Devices, Inc.

IC CURR SENSE 2 CIRCUIT 8MSOP

3945

LTC6240HVHS5#TRPBF

LTC6240HVHS5#TRPBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT TSOT23-5

0

LT1999IMS8-20F#TRPBF

LT1999IMS8-20F#TRPBF

Analog Devices, Inc.

IC CURR SENSE 1 CIRCUIT 8MSOP

0

MAX4077ESA

MAX4077ESA

Analog Devices, Inc.

IC GP OPAMP 2 CIRCUIT 8SOIC

35016

AD600JRZ-R7

AD600JRZ-R7

Analog Devices, Inc.

IC OPAMP VGA 2 CIRCUIT 16SOIC

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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