Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
LT1218CN8#PBF

LT1218CN8#PBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT 8DIP

149

LTC2051CS8#PBF

LTC2051CS8#PBF

Analog Devices, Inc.

IC OPAMP ZERO-DRIFT 2 CIRC 8SO

1694

OP42GSZ

OP42GSZ

Analog Devices, Inc.

IC OPAMP JFET 1 CIRCUIT 8SOIC

7

MAX4462UEUT-T

MAX4462UEUT-T

Analog Devices, Inc.

IC INST AMP 1 CIRCUIT SOT23-6

1315

MAX4451EKA

MAX4451EKA

Analog Devices, Inc.

OPERATIONAL AMPLIFIER

7163

LTC6255IS6#TRPBF

LTC6255IS6#TRPBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT TSOT23-6

0

AD8229HRZ-R7

AD8229HRZ-R7

Analog Devices, Inc.

IC INST AMP 1 CIRCUIT 8SOIC

0

LT1722IS5#TRMPBF

LT1722IS5#TRMPBF

Analog Devices, Inc.

IC OPAMP VFB 1 CIRCUIT TSOT23-5

723

LTC2055HVHDD#PBF

LTC2055HVHDD#PBF

Analog Devices, Inc.

IC OPAMP ZERO-DRIFT 2 CIRC 8DFN

0

AD8544ARUZ

AD8544ARUZ

Analog Devices, Inc.

IC OPAMP GP 4 CIRCUIT 14TSSOP

4253

MAX4252EUA

MAX4252EUA

Analog Devices, Inc.

IC GP OPAMP 2 CIRCUIT 8UMAX

3575

LT1636IDD#PBF

LT1636IDD#PBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT 8DFN

0

OP400HSZ

OP400HSZ

Analog Devices, Inc.

IC OPAMP GP 4 CIRCUIT 16SOIC

781

AD5748ACPZ

AD5748ACPZ

Analog Devices, Inc.

IC INST AMP 1 CIRCUIT 32LFCSP

670

AD8538AUJZ-R2

AD8538AUJZ-R2

Analog Devices, Inc.

OPERATIONAL AMPLIFIER

8144

ADA4891-1ARJZ-R7

ADA4891-1ARJZ-R7

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT SOT23-5

55314

LTC6261HS6#TRPBF

LTC6261HS6#TRPBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT TSOT23-6

0

OP275GSZ-REEL7

OP275GSZ-REEL7

Analog Devices, Inc.

IC AUDIO 2 CIRCUIT 8SOIC

1

LT1012AIN8#PBF

LT1012AIN8#PBF

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT 8DIP

88

LTC6262ITS8#TRMPBF

LTC6262ITS8#TRMPBF

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT TSOT23-8

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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