Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

Image Part Number Description / PDF Quantity Rfq
ISL1572IRZ-T7

ISL1572IRZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 2 CIRCUIT 16QFN

0

TS272BIDT

TS272BIDT

STMicroelectronics

IC OPAMP GP 2 CIRCUIT 8SO

1233

LT6370IDD#PBF

LT6370IDD#PBF

Analog Devices, Inc.

IC INST AMP 1 CIRCUIT 10DFN

39

TLC072IDGN

TLC072IDGN

Texas Instruments

IC OPAMP GP 2 CIRCUIT 8MSOP

320

OPA355UAG4

OPA355UAG4

Texas Instruments

IC CMOS 1 CIRCUIT 8SOIC

0

EL5306IUZ-T7

EL5306IUZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 3 CIRCUIT 16QSOP

0

LT1358CS8#TRPBF

LT1358CS8#TRPBF

Analog Devices, Inc.

IC OPAMP VFB 2 CIRCUIT 8SO

4176

KM4200IC8TR3

KM4200IC8TR3

OPERATIONAL AMPLIFIER

88677

INA330AIDGST

INA330AIDGST

Texas Instruments

IC OPAMP GP 1 CIRCUIT 10VSSOP

465

TLC271AIP

TLC271AIP

Texas Instruments

TLC271A PROGRAMMABLE LOW-POWER O

13915

LT1999HMS8-50F#WTRPBF

LT1999HMS8-50F#WTRPBF

Analog Devices, Inc.

IC CURR SENSE 1 CIRCUIT 8MSOP

0

MCP6C04T-020E/CHY

MCP6C04T-020E/CHY

Roving Networks / Microchip Technology

IC CURR SENSE 1 CIRCUIT SOT23-6

0

CLC5633IN

CLC5633IN

IC BUFFER 3 CIRCUIT 14DIP

2653

TLV2370ID

TLV2370ID

Texas Instruments

IC OPAMP GP 1 CIRCUIT 8SOIC

225

ISL28114FEZ-T7

ISL28114FEZ-T7

Intersil (Renesas Electronics America)

IC OPAMP GP 1 CIRCUIT SC70-5

0

OPA2704PA

OPA2704PA

Burr-Brown (Texas Instruments)

IC CMOS 2 CIRCUIT 8DIP

33678

L272D

L272D

STMicroelectronics

IC OPAMP GP 2 CIRCUIT 16SO

9242

INA290A5QDCKRQ1

INA290A5QDCKRQ1

Texas Instruments

AEC-Q100, 2.7-V TO 120-V, 1.1-MH

3000

MAX4014EUK+T

MAX4014EUK+T

Maxim Integrated

IC BUFFER 1 CIRCUIT SOT23-5

905

MCP6N11-100E/SN

MCP6N11-100E/SN

Roving Networks / Microchip Technology

IC INST AMP 1 CIRCUIT 8SOIC

1544

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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