Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX4326EUA+

MAX4326EUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

55

MAX4372TEUK+T

MAX4372TEUK+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT SOT23-5

6196

MAX4131ESA+

MAX4131ESA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

23719400

ICL7611BCSA+T

ICL7611BCSA+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

0

MAX4257ESA+T

MAX4257ESA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

0

MAX4219EEE+T

MAX4219EEE+T

Maxim Integrated

IC BUFFER 3 CIRCUIT 16QSOP

0

MAX4432EUA+

MAX4432EUA+

Maxim Integrated

IC OPAMP VFB 2 CIRCUIT 8UMAX

90700

MAX4213EUA+T

MAX4213EUA+T

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT 8UMAX

40000

MAX9919NASA+T

MAX9919NASA+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

16

MAX412ESA+T

MAX412ESA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

0

MAX9919FASA+T

MAX9919FASA+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

3512

MAX4246ASA+

MAX4246ASA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

30911300

MAX9638AVB+T

MAX9638AVB+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 10UTQFN

4675

MAX4323ESA+

MAX4323ESA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

159700

MAX4168EUB+

MAX4168EUB+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 10UMAX

570250

ICL7621BCSA+

ICL7621BCSA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

84400

MAX4042EUA+

MAX4042EUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

413300

MAX4172GUA+

MAX4172GUA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8UMAX

2300

MAX4080SASA+T

MAX4080SASA+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

7064

MAX4216EUA+T

MAX4216EUA+T

Maxim Integrated

IC OPAMP VFB 2 CIRCUIT 8UMAX

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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