Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA632U/2K5

OPA632U/2K5

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

0

OPA234UA-BB

OPA234UA-BB

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIERS

1447

OPA634N/250

OPA634N/250

Burr-Brown (Texas Instruments)

IC VOLT FEEDBACK 1CIRC SOT23-5

6380

OPA2650P

OPA2650P

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

4438

OPA2686U

OPA2686U

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

11158

INA141P

INA141P

Burr-Brown (Texas Instruments)

IC INST AMP 1 CIRCUIT 8DIP

0

OPA342UA/2K5

OPA342UA/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

5000

OPA2131PA

OPA2131PA

Burr-Brown (Texas Instruments)

IC GP OPAMP 2 CIRCUIT 8DIP

0

OPA634U

OPA634U

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

14072

INA2126PAG4

INA2126PAG4

Burr-Brown (Texas Instruments)

IC INST AMP 2 CIRCUIT 16DIP

0

OPA635U

OPA635U

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

16560

OPA234P

OPA234P

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8DIP

2765

OPA4743UAG4

OPA4743UAG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 4 CIRCUIT 14SOIC

0

OPA2251PAG4

OPA2251PAG4

Burr-Brown (Texas Instruments)

OPA2251 DUAL, 15V SINGLE-SUPPLY,

100

OPA2677N

OPA2677N

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

6507

OPA689P

OPA689P

Burr-Brown (Texas Instruments)

IC OPAMP LIMITING 1 CIRCUIT 8DIP

6786

OPA341UA

OPA341UA

Burr-Brown (Texas Instruments)

OPA341 SINGLE, 5.5MHZ, RRIO, LOW

0

OPA3681U

OPA3681U

Burr-Brown (Texas Instruments)

IC CFA 3 CIRCUIT 16SOIC

15375

OPA2682N

OPA2682N

Burr-Brown (Texas Instruments)

IC BUFFER 2 CIRCUIT 14SOIC

2452

OPA2541AM

OPA2541AM

Burr-Brown (Texas Instruments)

OPA2541 DUAL HIGH POWER OPERATIO

14703

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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