Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX4203EUA+

MAX4203EUA+

Maxim Integrated

IC BUFFER 2 CIRCUIT 8UMAX

1751

MAX492EPA+

MAX492EPA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8DIP

724100

MAX4243EUB+T

MAX4243EUB+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 10UMAX

2500

MAX4241ESA+

MAX4241ESA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

2355100

MAX4220EEE+

MAX4220EEE+

Maxim Integrated

IC OPAMP VFB 4 CIRCUIT 16QSOP

805300

MAX4173HESA+T

MAX4173HESA+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

81

MAX409BCPA+

MAX409BCPA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8DIP

755150

MAX4126EUA+T

MAX4126EUA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

0

MAX44290ANT+T

MAX44290ANT+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 6WLP

653030000

MAX44250AUA+T

MAX44250AUA+T

Maxim Integrated

IC OPAMP ZERO-DRIFT 1 CIRC 8UMAX

47500

MAX9920ASA/V+T

MAX9920ASA/V+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

0

MAX4016ESA+T

MAX4016ESA+T

Maxim Integrated

IC OPAMP VFB 2 CIRCUIT 8SOIC

0

MAX40010HAUT+T

MAX40010HAUT+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT SOT23-6L

7500

MAX4471ESA+

MAX4471ESA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

92219300

MAX4494AKA+T

MAX4494AKA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT SOT23-8

114

MAX44263AXA+T

MAX44263AXA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT SC70-8

3344

MAX4247AUB+

MAX4247AUB+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 10UMAX

323

MAX44284WAWT+T

MAX44284WAWT+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 6WLP

85000

ICL7621BESA+T

ICL7621BESA+T

Maxim Integrated

IC CMOS 1 CIRCUIT 8SO

0

MAX4022ESD+T

MAX4022ESD+T

Maxim Integrated

IC BUFFER 4 CIRCUIT 14SOIC

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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