Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
OPA4140AIPW

OPA4140AIPW

Texas Instruments

IC OPAMP JFET 4 CIRCUIT 14TSSOP

216

OPA682N/250

OPA682N/250

Texas Instruments

IC BUFFER 1 CIRCUIT SOT23-6

2726

TLE2062CDG4

TLE2062CDG4

Texas Instruments

IC OPAMP JFET 2 CIRCUIT 8SOIC

0

OPA132UA/2K5G4

OPA132UA/2K5G4

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8SOIC

0

LM1558H/NOPB

LM1558H/NOPB

Texas Instruments

IC OPAMP GP 2 CIRCUIT TO5-8

37610000

TLV9004QDRQ1

TLV9004QDRQ1

Texas Instruments

AEC-Q100, 4-CHANNEL, 1-MHZ, LOW-

11256

TLV2475CDR

TLV2475CDR

Texas Instruments

TLV2475 QUAD 6V, LOW-POWER RAIL-

25000

TL074CDG4

TL074CDG4

Texas Instruments

IC OPAMP JFET 4 CIRCUIT 14SOIC

1374

TLV2474IPWPR

TLV2474IPWPR

Texas Instruments

IC OPAMP GP 4 CIRCUIT 14HTSSOP

0

TLV2264ID

TLV2264ID

Texas Instruments

TLV2264 QUAD RAIL-TO-RAIL LOW-VO

25173

INA281B4QDBVRQ1

INA281B4QDBVRQ1

Texas Instruments

AEC-Q100, -4-V TO 110-V, 1.3-MHZ

3000

OPA277PAG4

OPA277PAG4

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8DIP

0

VCA2616YT

VCA2616YT

Texas Instruments

IC VARIABLE GAIN 2 CIRC 48TQFP

750

LM348NSR

LM348NSR

Texas Instruments

LM348 QUAD GENERAL-PURPOSE OPERA

5722

OPA177FPG4

OPA177FPG4

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8DIP

0

OPA2241PA

OPA2241PA

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8DIP

645

OPA2363AIRSVR

OPA2363AIRSVR

Texas Instruments

IC CMOS 2 CIRCUIT 16UQFN

1573

OPA2335AIDGKTG4

OPA2335AIDGKTG4

Texas Instruments

IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP

0

OP27AFKB

OP27AFKB

Texas Instruments

OP27 LOW-NOISE PRECISION HIGH-SP

185

LMP2012MA/NOPB

LMP2012MA/NOPB

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8SOIC

592

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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