Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
MAX49921FATA/VY+

MAX49921FATA/VY+

Maxim Integrated

BI- AND UNIDIRECTIONAL, -0.1V TO

938700

MAX4206ETE+T

MAX4206ETE+T

Maxim Integrated

IC OPAMP LOGARITHMIC 1CIRC 16QFN

0

MAX40079AUT+T

MAX40079AUT+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT23-6

47500

MAX9943ATT+T

MAX9943ATT+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT 6TDFN

1845

MAX34406WETG+

MAX34406WETG+

Maxim Integrated

IC CURR SENSE 4 CIRCUIT 24QFN

200

MAX4094AUD+T

MAX4094AUD+T

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14TSSOP

0

MAX4418EUD+T

MAX4418EUD+T

Maxim Integrated

IC OPAMP VFB 4 CIRCUIT 14TSSOP

0

MAX4384EUP+T

MAX4384EUP+T

Maxim Integrated

IC OPAMP VFB 4 CIRCUIT 20TSSOP

0

MAX4475AUT+T

MAX4475AUT+T

Maxim Integrated

IC OPAMP GP 1 CIRCUIT SOT23-6

658

MAX9611AUB+

MAX9611AUB+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 10UMAX

1050

MAX412CSA+

MAX412CSA+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 8SOIC

137700

MAX4127ESD+

MAX4127ESD+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 14SOIC

84

MAX4450EXK+T

MAX4450EXK+T

Maxim Integrated

IC OPAMP VFB 1 CIRCUIT SC70-5

27845000

MAX44252ASD+

MAX44252ASD+

Maxim Integrated

IC OPAMP ZERO-DRIFT 4CIRC 14SOIC

19924700

MAX4094AUD+

MAX4094AUD+

Maxim Integrated

IC OPAMP GP 4 CIRCUIT 14TSSOP

299

MAX4209HAUA+T

MAX4209HAUA+T

Maxim Integrated

IC INST AMP 1 CIRCUIT 8UMAX

0

MAX4200ESA+T

MAX4200ESA+T

Maxim Integrated

IC BUFFER 1 CIRCUIT 8SOIC

0

MAX4249EUB+

MAX4249EUB+

Maxim Integrated

IC OPAMP GP 2 CIRCUIT 10UMAX

16

MAX9918ASA+

MAX9918ASA+

Maxim Integrated

IC CURR SENSE 1 CIRCUIT 8SOIC

611

MAX4383ESD+

MAX4383ESD+

Maxim Integrated

IC OPAMP VFB 4 CIRCUIT 14SOIC

174

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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