Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA4343EA

OPA4343EA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

386

OPA137U

OPA137U

Burr-Brown (Texas Instruments)

OPA137 LOW COST FET-INPUT OPERAT

50030

OPA2680N

OPA2680N

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 2CIRC 14SOIC

16833

INA2126PG4

INA2126PG4

Burr-Brown (Texas Instruments)

IC INST AMP 2 CIRCUIT 16DIP

0

OPA2337PA

OPA2337PA

Burr-Brown (Texas Instruments)

OPA2337 DUAL MICROSIZE, SINGLE-S

104772

OPA277PG4

OPA277PG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8DIP

0

OPA103DM

OPA103DM

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT TO99-8

95

OPA686U

OPA686U

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

6895

OPA336PA

OPA336PA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

6017

OPA2234P

OPA2234P

Burr-Brown (Texas Instruments)

IC GP OPAMP 2 CIRCUIT 8DIP

12775

OPA2234PA

OPA2234PA

Burr-Brown (Texas Instruments)

IC GP OPAMP 2 CIRCUIT 8DIP

5267

INA2322EA/250

INA2322EA/250

Burr-Brown (Texas Instruments)

IC INST AMP 2 CIRCUIT 14TSSOP

0

OPA137P

OPA137P

Burr-Brown (Texas Instruments)

IC OPAMP JFET 1 CIRCUIT 8DIP

20960

INA141PA

INA141PA

Burr-Brown (Texas Instruments)

IC INST AMP 1 CIRCUIT 8DIP

35369

OPA2681N

OPA2681N

Burr-Brown (Texas Instruments)

IC CFA 2 CIRCUIT 14SOIC

33496

OPA2677N/2K5

OPA2677N/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

7500

PGA203KPG4

PGA203KPG4

Burr-Brown (Texas Instruments)

PGA203 DIGITALLY CONTROLLED PROG

25

BUF600AP

BUF600AP

Burr-Brown (Texas Instruments)

IC BUFFER 1 CIRCUIT 8DIP

2466

OPA2681N-1/2K5

OPA2681N-1/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

37500

OPA340UAG4

OPA340UAG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8SOIC

0

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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