Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX4081FAUA+

MAX4081FAUA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8UMAX

27

MAX4126EUA+

MAX4126EUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

7141450

ICL7611BCPA+

ICL7611BCPA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8DIP

1009100

MAX4454EUD+T

MAX4454EUD+T

Maxim Integrated

IC OPAMP VFB 4 CIRCUIT 14TSSOP

0

MAX44246AUA+T

MAX44246AUA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

2728

MAX4208AUA+

MAX4208AUA+

Maxim Integrated

IC INST AMP 1 CIRCUIT 8UMAX

335

MAX44285TAUA+

MAX44285TAUA+

Maxim Integrated

IC CURR SENSE 2 CIRCUIT 8UMAX

1811450

MAX4472ESD+T

MAX4472ESD+T

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14SOIC

22500

MAX34406FETG+T

MAX34406FETG+T

Maxim Integrated

IC CURR SENSE 4 CIRCUIT 24QFN

0

MAX4173TESA+

MAX4173TESA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

1754700

MAX4105ESA+

MAX4105ESA+

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT 8SOIC

11627300

MAX4285EUT+T

MAX4285EUT+T

Maxim Integrated

IC BUFFER 1 CIRCUIT SOT23-6

2500

MAX4265EUA+T

MAX4265EUA+T

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT 8UMAX

0

MAX4291EXK+T

MAX4291EXK+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SC70-5

155020000

MAX4040EUK+T

MAX4040EUK+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT23-5

1074

MAX4017ESA+

MAX4017ESA+

Maxim Integrated

IC BUFFER 2 CIRCUIT 8SOIC

23615000

MAX4238AUT/V+T

MAX4238AUT/V+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT23-6

0

MAX4162ESA+T

MAX4162ESA+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

121627500

MAX494ESD+

MAX494ESD+

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14SOIC

5643150

MAX9938HEUK+T

MAX9938HEUK+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT SOT23-5

23453

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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