Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX4471ESA+T

MAX4471ESA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

0

MAX492CPA+

MAX492CPA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8DIP

3343000

MAX9938TEUK+T

MAX9938TEUK+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT SOT23-5

40757

MAX34406HETG+

MAX34406HETG+

Maxim Integrated

IC CURR SENSE 4 CIRCUIT 24QFN

131

MAX4305ESA+T

MAX4305ESA+T

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT 8SOIC

2500

MAX9923TEUB+

MAX9923TEUB+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 10UMAX

4501450

MAX4251EUA+

MAX4251EUA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8UMAX

10

ICL7611DCSA+

ICL7611DCSA+

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8SOIC

1005500

MAX4494AUA+T

MAX4494AUA+T

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

0

MAX4173HESA+

MAX4173HESA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

1110

MAX9934FAUA+T

MAX9934FAUA+T

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8UMAX

22500

MAX4322EUK+T

MAX4322EUK+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT23-5

155

MAX44251AKA+T

MAX44251AKA+T

Maxim Integrated

IC OPAMP ZER-DRIFT 2CIRC SOT23-8

361412500

MAX4222ESD+

MAX4222ESD+

Maxim Integrated

IC BUFFER 4 CIRCUIT 14SOIC

482100

MAX40077AUA+

MAX40077AUA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8UMAX

4050

MAX4483ASD+

MAX4483ASD+

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14SOIC

3000

MAX4251EUA+T

MAX4251EUA+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 8UMAX

0

MAX4266EUA+T

MAX4266EUA+T

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT 8UMAX

0

MAX4478AUD+

MAX4478AUD+

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14TSSOP

5933072

MAX4478AUD+T

MAX4478AUD+T

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14TSSOP

3015

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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