Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
HMC675LC3CTR

HMC675LC3CTR

Analog Devices, Inc.

HI SPEED LATCHED COMP-RSCML , 10

100

MAX961ESA

MAX961ESA

Analog Devices, Inc.

HIGH-SPEED COMPARATOR

556

LTC1443IN#PBF

LTC1443IN#PBF

Analog Devices, Inc.

IC COMP W/REF LOWPWR QUAD 16-DIP

0

LT6700HS6-1#WTRPBF

LT6700HS6-1#WTRPBF

Analog Devices, Inc.

UP, L V, 2X COMP W/ 400MV REF

0

MAX997EUA

MAX997EUA

Analog Devices, Inc.

HIGH SPEED COMPARATOR

0

AD96687BRZ-REEL

AD96687BRZ-REEL

Analog Devices, Inc.

IC COMPARATOR DUAL 2.5NS 16SOIC

0

LT1713CMS8#PBF

LT1713CMS8#PBF

Analog Devices, Inc.

IC COMP R-R I/O SINGLE LP 8MSOP

0

LT6700HS6-2#TRPBF

LT6700HS6-2#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

LT6700IDCB-1#TRMPBF

LT6700IDCB-1#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

392

MAX989EKA-T

MAX989EKA-T

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

1615

MAX965ESA

MAX965ESA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

0

MAX972CPA

MAX972CPA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

2824

LT1394CMS8#TRPBF

LT1394CMS8#TRPBF

Analog Devices, Inc.

IC COMPARATOR 7NS LOW PWR 8MSOP

0

ADCMP581BCPZ-R2

ADCMP581BCPZ-R2

Analog Devices, Inc.

COMPARATOR

12722

LT6700IS6-3#TRPBF

LT6700IS6-3#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

3122

MAX921CSA-T

MAX921CSA-T

Analog Devices, Inc.

DUAL-SUPPLY COMPARATOR

5000

LTC1441CS8#TRPBF

LTC1441CS8#TRPBF

Analog Devices, Inc.

IC COMP W/REF LP DUAL 8-SOIC

0

ADCMP581BCP-WP

ADCMP581BCP-WP

Analog Devices, Inc.

COMPARATOR

8850

LT1720CS8#PBF

LT1720CS8#PBF

Analog Devices, Inc.

IC COMP R-RINOUT DUAL 8-SOIC

3858

MAX921ESA

MAX921ESA

Analog Devices, Inc.

DUAL-SUPPLY COMPARATOR

2430

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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