Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
ISL28408FBZ-T13

ISL28408FBZ-T13

Intersil (Renesas Electronics America)

IC OPAMP GP 4 CIRCUIT 14SOIC

5000

EL5174ISZ

EL5174ISZ

Intersil (Renesas Electronics America)

IC OPAMP DIFF 1 CIRCUIT 8SOIC

0

ISL28134IBZ-T13

ISL28134IBZ-T13

Intersil (Renesas Electronics America)

IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC

0

ISL28290FBZ

ISL28290FBZ

Intersil (Renesas Electronics America)

IC OPAMP VFB 2 CIRCUIT 8SOIC

0

EL5153IW-T7A

EL5153IW-T7A

Intersil (Renesas Electronics America)

IC VOLT FEEDBACK 1CIRC SOT23-5

20750

HFA1130IBZ-T

HFA1130IBZ-T

Intersil (Renesas Electronics America)

IC OPAMP CFA 1 CIRCUIT 8SOIC

0

ISL28118MUZ

ISL28118MUZ

Intersil (Renesas Electronics America)

IC OPAMP GP 1 CIRCUIT 8MSOP

427

CA3140AEZ

CA3140AEZ

Intersil (Renesas Electronics America)

IC OPAMP GP 1 CIRCUIT 8DIP

4862

EL5411IRZ-T7

EL5411IRZ-T7

Intersil (Renesas Electronics America)

IC VOLT FEEDBACK 4CIRC 14TSSOP

1000

EL5192ACWZ-T7A

EL5192ACWZ-T7A

Intersil (Renesas Electronics America)

IC OPAMP CFA 1 CIRCUIT SOT23-6

250

EL5164ISZ-T13

EL5164ISZ-T13

Intersil (Renesas Electronics America)

IC OPAMP CFA 1 CIRCUIT 8SOIC

0

CA5260MZ

CA5260MZ

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 8SOIC

446

HA4P5002-5Z

HA4P5002-5Z

Intersil (Renesas Electronics America)

IC BUFFER 1 CIRCUIT 20PLCC

0

CA3140AM

CA3140AM

Intersil (Renesas Electronics America)

IC GP OPAMP 1 CIRCUIT 8SOIC

2869

EL2227CSZ-T7

EL2227CSZ-T7

Intersil (Renesas Electronics America)

IC VOLTAGE FEEDBACK 2 CIRC 8SOIC

2000

ISL28207FBZ-T7A

ISL28207FBZ-T7A

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 8SOIC

500

EL8201ISZ-T13

EL8201ISZ-T13

Intersil (Renesas Electronics America)

VIDEO AMPLIFIER, 2 FUNC, PDSO8

4902

ISL28213FBZ-T7

ISL28213FBZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 8SOIC

0

HA2-2625-5

HA2-2625-5

Intersil (Renesas Electronics America)

OPERATIONAL AMPLIFIER

27018

HA3-2505-5

HA3-2505-5

Intersil (Renesas Electronics America)

HIGH INPUT IMPEDANCE OP AMP

22924

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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