Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA650UB

OPA650UB

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

8199

OPA631U/2K5

OPA631U/2K5

Burr-Brown (Texas Instruments)

IC VOLTAGE FEEDBACK 1 CIRC 8SOIC

2500

4127JG

4127JG

Burr-Brown (Texas Instruments)

IC LOG AMP 2 CIRCUIT 24CDIP

164

OPA2705PA

OPA2705PA

Burr-Brown (Texas Instruments)

OPA2705 12V, LOW COST, RAIL-TO-R

22292

OPA345UAG4

OPA345UAG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8SOIC

0

OPA338UAG4

OPA338UAG4

Burr-Brown (Texas Instruments)

OPA338 SINGLE 12.5MHZ MICROSIZE,

375

3584JM

3584JM

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 3TO-CAN

738

INA101HP-1

INA101HP-1

Burr-Brown (Texas Instruments)

INSTRUMENTATION AMPLIFIER, 1 FUN

671

OPA2743UAG4

OPA2743UAG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 2 CIRCUIT 8SOIC

0

OPA2662AU

OPA2662AU

Burr-Brown (Texas Instruments)

IC TRANSCOND 2 CIRCUIT 16SOIC

3420

OPA2607U

OPA2607U

Burr-Brown (Texas Instruments)

IC CFA 2 CIRCUIT 8SOIC

3778

OPA1013DN8

OPA1013DN8

Burr-Brown (Texas Instruments)

OPA1013 PRECISION, SINGLE-SUPPLY

16175

OPA347UAG4

OPA347UAG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8SOIC

0

OPA2111AM

OPA2111AM

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

72894

OPA336P

OPA336P

Burr-Brown (Texas Instruments)

IC CMOS 1 CIRCUIT 8DIP

6988

LMH6503MT-BB

LMH6503MT-BB

Burr-Brown (Texas Instruments)

IC VARIABLE GAIN 1 CIRC 14TSSOP

69

OPA404BG-BB

OPA404BG-BB

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

87

OPA376AIDG4

OPA376AIDG4

Burr-Brown (Texas Instruments)

IC GP OPAMP 1 CIRCUIT 8SOIC

0

INA2128UA-1

INA2128UA-1

Burr-Brown (Texas Instruments)

IC OPAMP INSTR 1.3MHZ 16SOIC

4648

OPA2634U/2K5

OPA2634U/2K5

Burr-Brown (Texas Instruments)

OPERATIONAL AMPLIFIER

5000

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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