Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
APX321SEG-7

APX321SEG-7

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 1 CIRCUIT SOT353

2722

APX321WG-7

APX321WG-7

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 1 CIRCUIT SOT25

1557

AP4320BK6TR-G1

AP4320BK6TR-G1

Zetex Semiconductors (Diodes Inc.)

IC CURR SENSE 1 CIRCUIT SOT26

1796

APX324TSG-13

APX324TSG-13

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 4 CIRCUIT 14TSSOP

0

AP358SG-13

AP358SG-13

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SOP

19617500

LMV321SEG-7

LMV321SEG-7

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 1 CIRCUIT SOT353

0

TLV272CM8-13

TLV272CM8-13

Zetex Semiconductors (Diodes Inc.)

IC CMOS 2 CIRCUIT 8MSOP

1702

AP4310AMTR-G1

AP4310AMTR-G1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SOIC

7351

APX4558S-13

APX4558S-13

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SO

0

AS358AMTR-G1

AS358AMTR-G1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SOIC

0

AZ4558CMTR-E1

AZ4558CMTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SOIC

280

LM2902S14-13

LM2902S14-13

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 4 CIRCUIT 14SO

5000

AZ4580MTR-G1

AZ4580MTR-G1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SOIC

3023

LM2904QM8-13

LM2904QM8-13

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8MSOP

0

AP4313UKTR-G1

AP4313UKTR-G1

Zetex Semiconductors (Diodes Inc.)

IC CURR SENSE 1 CIRCUIT SOT23-6

0

AP4306DUKTR-G1

AP4306DUKTR-G1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP DUAL SOT26

0

AP4320AK6TR-G1

AP4320AK6TR-G1

Zetex Semiconductors (Diodes Inc.)

IC CURR SENSE 1 CIRCUIT SOT26

1254

AZV358MTR-E1

AZV358MTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8SOIC

0

AZV358GTR-E1

AZV358GTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8TSSOP

0

LM2904AM8-13

LM2904AM8-13

Zetex Semiconductors (Diodes Inc.)

IC OPAMP GP 2 CIRCUIT 8MSOP

3183

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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