Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA705UA

OPA705UA

Burr-Brown (Texas Instruments)

OPA705 12V, LOW COST, RAIL-TO-RA

0

TLC2264AIN

TLC2264AIN

Burr-Brown (Texas Instruments)

TLC2264A ADVANCED LINCMOS RAIL-T

39227

SHC298AJP

SHC298AJP

Burr-Brown (Texas Instruments)

IC SAMPL/HOLD 1 CIRCUIT 8DIP

9298

OPA4342PA

OPA4342PA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

43423

OPA4342EA/2K5

OPA4342EA/2K5

Burr-Brown (Texas Instruments)

IC GP OPAMP 4 CIRCUIT 14TSSOP

0

OPA643N/250-BB

OPA643N/250-BB

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

0

OPA4658P

OPA4658P

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

5162

OPA2677T

OPA2677T

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

40184

OPA241UAG4

OPA241UAG4

Burr-Brown (Texas Instruments)

OPA241 SINGLE, 5V SINGLE-SUPPLY,

200

OPA337PAG4

OPA337PAG4

Burr-Brown (Texas Instruments)

IC CMOS 1 CIRCUIT 8DIP

200

OPA660AU/2K5

OPA660AU/2K5

Burr-Brown (Texas Instruments)

IC TRANSCOND 1 CIRCUIT 8SOIC

2423

OPA2613IDR

OPA2613IDR

Burr-Brown (Texas Instruments)

OPA2613 DUAL WIDEBAND, HIGH-OUTP

173917

OPA631N/3K

OPA631N/3K

Burr-Brown (Texas Instruments)

IC VOLT FEEDBACK 1CIRC SOT23-5

6000

INA2128PA

INA2128PA

Burr-Brown (Texas Instruments)

INSTRUMENTATION AMPLIFIER

133

OPA640UB

OPA640UB

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

3546

OPA27GPG4

OPA27GPG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8DIP

0

OPA2344PA

OPA2344PA

Burr-Brown (Texas Instruments)

IC CMOS 2 CIRCUIT 8DIP

29814

OPA4705UA

OPA4705UA

Burr-Brown (Texas Instruments)

IC GP OPAMP 4 CIRCUIT 14SOIC

19500

OPA2703PA

OPA2703PA

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

23405

OPA234U

OPA234U

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIERS

129

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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