Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
LM7322QMAX/NOPB

LM7322QMAX/NOPB

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

0

OPA128JM

OPA128JM

Texas Instruments

OPERATIONAL AMPLIFIER

6759

LT1215CN8#PBF

LT1215CN8#PBF

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT 8DIP

93

5962-87710022A

5962-87710022A

Texas Instruments

LM158A DUAL GENERAL PURPOSE BIPO

20

AD8691AUJZ-REEL7

AD8691AUJZ-REEL7

Analog Devices, Inc.

IC OPAMP GP 1 CIRCUIT TSOT5

1489

LT1816IMS8#TRPBF

LT1816IMS8#TRPBF

Analog Devices, Inc.

IC OPAMP VFB 2 CIRCUIT 8MSOP

0

ADA4841-1YRJZ-R2

ADA4841-1YRJZ-R2

Analog Devices, Inc.

IC OPAMP VFB 1 CIRCUIT SOT23-6

1338

TSV7722IST

TSV7722IST

STMicroelectronics

HIGH BANDWIDTH (22MHZ) LOW OFFSE

1000

AD8221TRMZ-EP-R7

AD8221TRMZ-EP-R7

Analog Devices, Inc.

IC INST AMP 1 CIRCUIT 8MSOP

0

AD8629TRZ-EP-R7

AD8629TRZ-EP-R7

Analog Devices, Inc.

IC OPAMP GP 2 CIRCUIT 8SOIC

1000

OP27EP+

OP27EP+

Analog Devices, Inc.

PRECISION OPERATIONAL AMPLIFIER

2396

LMC6041IN/NOPB

LMC6041IN/NOPB

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8DIP

77910000

SC2904DR2G

SC2904DR2G

IC OPAMP 8SOIC

99066

LT1787HVIS8#PBF

LT1787HVIS8#PBF

Analog Devices, Inc.

IC CURR SENSE 1 CIRCUIT 8SO

338

TLC274ACNE4

TLC274ACNE4

Texas Instruments

TLC274A LINCMOS IMPROVED OFFSET

0

MAX4266ESA

MAX4266ESA

Analog Devices, Inc.

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

12562

ISL28113FHZ-T7

ISL28113FHZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 1 CIRCUIT SOT23-5

0

MCP6294T-E/ST

MCP6294T-E/ST

Roving Networks / Microchip Technology

IC OPAMP GP 4 CIRCUIT 14TSSOP

0

PGA280AIPWR

PGA280AIPWR

Texas Instruments

IC OPAMP PGA 1 CIRCUIT 24TSSOP

2889

LMR358FVJ-GE2

LMR358FVJ-GE2

ROHM Semiconductor

IC OPAMP GP 2 CIRCUIT 8TSSOP

1278

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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