Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA234PA

OPA234PA

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8DIP

3269

OPA643UB

OPA643UB

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

5641

OPA2704PA

OPA2704PA

Burr-Brown (Texas Instruments)

IC CMOS 2 CIRCUIT 8DIP

33678

OPA4137P

OPA4137P

Burr-Brown (Texas Instruments)

OPA4137 LOW COST FET-INPUT OPERA

6063

SHC5320SH

SHC5320SH

Burr-Brown (Texas Instruments)

IC SAMPL/HOLD 1 CIRCUIT 14CDIP

5587

OPA347PAG4

OPA347PAG4

Burr-Brown (Texas Instruments)

OPA347 MICROPOWER RAIL-TO-RAIL O

0

OPA4650P

OPA4650P

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

2804

OPA631N/250

OPA631N/250

Burr-Brown (Texas Instruments)

IC VOLT FEEDBACK 1CIRC SOT23-5

11000

OPA4704UA

OPA4704UA

Burr-Brown (Texas Instruments)

OPA4704 QUAD 12V, 3MHZ, RAIL-TO-

13393

OPA2607U/2K5

OPA2607U/2K5

Burr-Brown (Texas Instruments)

IC CFA 2 CIRCUIT 8SOIC

2500

OPA660AU

OPA660AU

Burr-Brown (Texas Instruments)

IC TRANSCOND 1 CIRCUIT 8SOIC

8472

OPA4344PA

OPA4344PA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

50834

OPA2631U/2K5

OPA2631U/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

52500

OPA620KU

OPA620KU

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

986

OPA642P

OPA642P

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8DIP

2512

OPA4131PA

OPA4131PA

Burr-Brown (Texas Instruments)

OPA4131 GENERAL PURPOSE FET-INPU

14752

OPA621KP

OPA621KP

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8DIP

10512

OPA2658P

OPA2658P

Burr-Brown (Texas Instruments)

IC CFA 2 CIRCUIT 8DIP

11903

OPA4347EA

OPA4347EA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

0

OPA104BM

OPA104BM

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT TO99-8

395

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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