Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
HMC875LC3CTR-R5

HMC875LC3CTR-R5

Analog Devices, Inc.

IC COMPARATOR RSCML 16SMD

0

LTC6754HSC6#PBF

LTC6754HSC6#PBF

Analog Devices, Inc.

IC COMPARATOR R-R 6SC70

0

ADCMP600BRJZ-RL

ADCMP600BRJZ-RL

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SOT23-5

0

ADCMP601BKSZ-RL

ADCMP601BKSZ-RL

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SC70-6

0

LT1720IS8#TR

LT1720IS8#TR

Analog Devices, Inc.

IC COMP DUAL R-R 4MA 4.5NS 8SOIC

0

LT1719IS6#TRM

LT1719IS6#TRM

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE SOT23-6

0

LT685CN#PBF

LT685CN#PBF

Analog Devices, Inc.

IC COMP HI-SPD ECL OUTPUT 16-DIP

0

LTC1531CSW#PBF

LTC1531CSW#PBF

Analog Devices, Inc.

IC COMP ISOLATED SLF-PWRD 28SOIC

0

LT311AN8

LT311AN8

Analog Devices, Inc.

IC VOLTAGE COMPARATOR 8-DIP

0

LT685CN

LT685CN

Analog Devices, Inc.

IC COMP HI-SPD ECL OUTPUT 16-DIP

0

LTC1531CSW#TRPBF

LTC1531CSW#TRPBF

Analog Devices, Inc.

IC COMP ISOLATED SLF-PWRD 28SOIC

0

LTC6754ISC6#PBF

LTC6754ISC6#PBF

Analog Devices, Inc.

IC COMPARATOR R-R 6SC70

0

LT1721IGN

LT1721IGN

Analog Devices, Inc.

IC COMP R-RINOUT QUAD 16-SSOP

0

AD8564AR

AD8564AR

Analog Devices, Inc.

IC COMPARATOR QUAD 7NS 16-SOIC

0

LT1715IMS

LT1715IMS

Analog Devices, Inc.

IC COMPARATOR 150MHZ DUAL 10MSOP

0

HMC676LC3CTR-R5

HMC676LC3CTR-R5

Analog Devices, Inc.

IC COMPARATOR RSECL 16SMD

0

HMC676LP3ETR

HMC676LP3ETR

Analog Devices, Inc.

IC COMPARATOR RSECL 16QFN

0

LTC6702HDC

LTC6702HDC

Analog Devices, Inc.

IC POWER MANAGEMENT

0

LT1719IS6#TR

LT1719IS6#TR

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE SOT23-6

0

HMC875LC3C

HMC875LC3C

Analog Devices, Inc.

IC COMPARATOR RSCML 16SMD

0

Linear - Comparators

1. Overview

Linear comparators are analog integrated circuits designed to compare two voltage signals and output a digital signal indicating which voltage is higher. They serve as fundamental components in electronic systems, enabling decision-making processes in applications ranging from voltage level detection to waveform shaping. Their importance spans industries such as industrial automation, consumer electronics, automotive systems, and medical devices, where precise signal comparison is critical.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
General-Purpose ComparatorsBasic voltage comparison with moderate speed and accuracySimple threshold detection in appliances
Precision ComparatorsLow offset voltage and high accuracyInstrumentation and measurement equipment
High-Speed ComparatorsSub-nanosecond response timesRF signal processing and oscilloscopes
Low-Power ComparatorsUltra-low quiescent currentBattery-powered IoT devices
Window ComparatorsDetect if input voltage falls within a defined rangePower supply monitoring systems

3. Structure and Composition

A linear comparator typically consists of:

  • Differential Amplifier Stage: Amplifies the voltage difference between inputs
  • Reference Voltage Circuit: Provides stable threshold voltages
  • Output Stage: Generates rail-to-rail digital output (e.g., CMOS, TTL-compatible)
  • Protection Circuits: ESD protection and overvoltage tolerance

Common package types include SOIC, SOT-23, and TSSOP. Advanced designs integrate hysteresis circuits or voltage references.

4. Key Technical Specifications

ParameterDescriptionImportance
Input Offset VoltageMaximum voltage difference required to switch outputDetermines comparison accuracy
Propagation DelayTime between input change and output responseCritical for high-speed applications
Supply Voltage RangeOperating voltage range (e.g., 2.7V-36V)Dictates system power design
Power ConsumptionQuiescent current under active/idle conditionsBattery life optimization
HysteresisVoltage margin to prevent oscillation near thresholdsImproves noise immunity

5. Application Areas

  • Industrial: PLC input modules, motor control systems
  • Consumer: Smartphone battery level indicators
  • Automotive: Battery management in EVs, sensor signal conditioning
  • Medical: ECG signal analysis equipment
  • Telecommunications: Optical receiver signal detection

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
TI (Texas Instruments)LM393Dual comparator, 2.0V-36V supply, 1.3 A quiescent current
STMicroelectronicsTLV32011.8V supply, 40ns propagation delay
Analog DevicesAD8561Single-supply, 7ns response time
ON SemiconductorNCS2250Zero-drift architecture, 10 V offset

7. Selection Guidelines

  1. Speed Requirements: Match propagation delay to system clock rates
  2. Accuracy Needs: Select offset voltage <1mV for precision sensing
  3. Power Constraints: Choose nano-power variants for portable devices
  4. Environmental Factors: Consider temperature-rated parts (-40 C to +125 C)
  5. Integration Level: Opt for devices with built-in references/hysteresis

8. Industry Trends

  • Miniaturization: WLCSP packages enabling wearable device integration
  • Energy Efficiency: Sub-1 A quiescent current devices for always-on systems
  • Higher Integration: Comparators with ADC interfaces and digital calibration
  • Broadband Operation: GHz-range comparators for 5G infrastructure
  • Smart Sensing: Embedded AI for adaptive threshold control
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