Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX4454ESD+

MAX4454ESD+

Maxim Integrated

IC OPAMP VFB 4 CIRCUIT 14SOIC

2609550

MAX4081SAUA+

MAX4081SAUA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8UMAX

562250

MAX4492ASD+

MAX4492ASD+

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14SOIC

5471000

MAX4486AUA+

MAX4486AUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

1050

MAX4304EUK+T

MAX4304EUK+T

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT SOT23-5

7500

MAX4242ESA+T

MAX4242ESA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

0

MAX4223ESA+

MAX4223ESA+

Maxim Integrated

IC OPAMP CFA 1 CIRCUIT 8SOIC

46328500

MAX4462HETT+T

MAX4462HETT+T

Maxim Integrated

IC INST AMP 1 CIRCUIT 6TDFN

303

MAX4256ESA+T

MAX4256ESA+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

0

MAX406BESA+

MAX406BESA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

199

MAX4081FASA+

MAX4081FASA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

521

MAX40056FAUA/V+

MAX40056FAUA/V+

Maxim Integrated

CURRENT-SENSE AMPLIFIER W / PWM

4450

MAX3798ETJ+

MAX3798ETJ+

Maxim Integrated

IC OPAMP LIMITING 1 CIRC 32TQFN

267

MAX44248AUA+

MAX44248AUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

7951800

MAX4282EUA+

MAX4282EUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

300

MAX4460ESA+

MAX4460ESA+

Maxim Integrated

IC INST AMP 1 CIRCUIT 8SOIC

2092800

MAX4218EEE+

MAX4218EEE+

Maxim Integrated

IC OPAMP VFB 3 CIRCUIT 16QSOP

56800

MAX4081TASA+

MAX4081TASA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

4102800

ICL7611ACPA+

ICL7611ACPA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8DIP

9

MAX40079AUT+

MAX40079AUT+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT6

25670

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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