Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
ISL28414FVZ

ISL28414FVZ

Intersil (Renesas Electronics America)

IC OPAMP GP 4 CIRCUIT 14TSSOP

0

ISL28634FVZ-T13

ISL28634FVZ-T13

Intersil (Renesas Electronics America)

IC OPAMP ZER-DRIFT 1CIRC 14TSSOP

0

CA0258E

CA0258E

Intersil (Renesas Electronics America)

OPERATIONAL AMPLIFIER

1900

EL5223CRZ

EL5223CRZ

Intersil (Renesas Electronics America)

IC BUFFER 8 CIRCUIT 20TSSOP

556

EL8401IUZ

EL8401IUZ

Intersil (Renesas Electronics America)

IC VOLTAGE FEEDBACK 4CIRC 16QSOP

2002

ICL7611DCBA

ICL7611DCBA

Intersil (Renesas Electronics America)

IC GP OPAMP 1 CIRCUIT 8SOIC

34168

EL5420TIRZ

EL5420TIRZ

Intersil (Renesas Electronics America)

IC OPAMP VFB 4 CIRCUIT 14TSSOP

0

ISL55002IBZ

ISL55002IBZ

Intersil (Renesas Electronics America)

IC OPAMP VFB 2 CIRCUIT 8SOIC

1834

ISL28006FH20Z-T7

ISL28006FH20Z-T7

Intersil (Renesas Electronics America)

IC CURR SENSE 1 CIRCUIT SOT23-5

0

ISL28117FBZ-T7A

ISL28117FBZ-T7A

Intersil (Renesas Electronics America)

IC OPAMP GP 1 CIRCUIT 8SOIC

0

5962-8972101GC

5962-8972101GC

Intersil (Renesas Electronics America)

OPERATIONAL AMPLIFIER

723

ISL28430CVZ

ISL28430CVZ

Intersil (Renesas Electronics America)

IC OPAMP GP 4 CIRCUIT 14TSSOP

0

ISL28288FUZ-T7

ISL28288FUZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 10MSOP

0

EL5364ISZ-T7

EL5364ISZ-T7

Intersil (Renesas Electronics America)

IC OPAMP CFA 3 CIRCUIT 16SOIC

779

ISL28208FRTZ-T7A

ISL28208FRTZ-T7A

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 8TDFN

1225

HFA1115IB

HFA1115IB

Intersil (Renesas Electronics America)

CLOSED LOOP AMPLIFIER

7249

ISL28217FUZ

ISL28217FUZ

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 8MSOP

0

ISL28417FBBZ-T7

ISL28417FBBZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 4 CIRCUIT 14SOIC

0

EL5306IUZ-T13

EL5306IUZ-T13

Intersil (Renesas Electronics America)

IC OPAMP GP 3 CIRCUIT 16QSOP

0

ISL28005FH50Z-T7A

ISL28005FH50Z-T7A

Intersil (Renesas Electronics America)

IC CURR SENSE 1 CIRCUIT SOT23-5

3695

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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