Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX2472EUT+T

MAX2472EUT+T

Maxim Integrated

IC BUFFER 1 CIRCUIT SOT23-6

246510000

MAX4222EEE+T

MAX4222EEE+T

Maxim Integrated

IC BUFFER 4 CIRCUIT 16QSOP

0

MAX4019ESD+

MAX4019ESD+

Maxim Integrated

IC BUFFER 3 CIRCUIT 14SOIC

331750

MAX4200ESA+

MAX4200ESA+

Maxim Integrated

IC BUFFER 1 CIRCUIT 8SOIC

987300

MAX4172ESA+T

MAX4172ESA+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

2667

MAX9613AXT+T

MAX9613AXT+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SC70-6

25875000

MAX4250EUK+T

MAX4250EUK+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT23-5

4121

MAX4472ESD+

MAX4472ESD+

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14SOIC

82811950

MAX4338EUB+

MAX4338EUB+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 10UMAX

0

MAX406AESA+T

MAX406AESA+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

0

MAX9929FABT+T

MAX9929FABT+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 6UCSP

2833

MAX4489AUA+

MAX4489AUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

799

MAX4470EXK+T

MAX4470EXK+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SC70-5

18805000

MAX4257EUA+T

MAX4257EUA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

0

MAX4477ASA+T

MAX4477ASA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

2138

MAX4231AXT+T

MAX4231AXT+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SC70-6

266032500

MAX4478ASD+T

MAX4478ASD+T

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14SOIC

2940

MAX4080TASA+

MAX4080TASA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

709

MAX4378TASD+T

MAX4378TASD+T

Maxim Integrated

IC CURR SENSE 4 CIRCUIT 14SOIC

0

MAX4081SASA+

MAX4081SASA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

623500

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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