Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX987EUK-T

MAX987EUK-T

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

7288

LT6700CS6-3#TRMPBF

LT6700CS6-3#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

MAX901ACPE

MAX901ACPE

Analog Devices, Inc.

LOW-POWER VOLTAGE COMPARATOR

918

LTC1444IDHD#PBF

LTC1444IDHD#PBF

Analog Devices, Inc.

IC COMP QD LP 1.221VREF 16-DFN

784

MAX933CPA

MAX933CPA

Analog Devices, Inc.

COMPARATOR WITH REFERENCE

233

LTC1842IS8#TRPBF

LTC1842IS8#TRPBF

Analog Devices, Inc.

IC COMP ULTLOPWR W/REF DL 8SOIC

341

MAX9022AUA

MAX9022AUA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

0

ADCMP573BCPZ-RL7

ADCMP573BCPZ-RL7

Analog Devices, Inc.

COMPARATOR, 5000UV OFFSET-MAX, 0

12628

CMP401GSZ

CMP401GSZ

Analog Devices, Inc.

IC COMPARATOR LV 23NS 16-SOIC

633

MAX9021AUK-T

MAX9021AUK-T

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

0

LTC1443CDHD#PBF

LTC1443CDHD#PBF

Analog Devices, Inc.

IC COMP W/REF LOWPWR QUAD 16DFN

26

MAX9065EUK+

MAX9065EUK+

Analog Devices, Inc.

MAX9065 ULTRA-SMALL, LOW-POWER,

4737

ADCMP582BCP-WP

ADCMP582BCP-WP

Analog Devices, Inc.

COMPARATOR

8666

LTC1440IS8#PBF

LTC1440IS8#PBF

Analog Devices, Inc.

IC COMP W/REF LP SINGLE 8-SOIC

2275

MAX9686MTW-4

MAX9686MTW-4

Analog Devices, Inc.

MAX9686 TTL VOLTAGE

13

AD8611AR-REEL7

AD8611AR-REEL7

Analog Devices, Inc.

COMPARATOR

1000

LT1720CMS8#PBF

LT1720CMS8#PBF

Analog Devices, Inc.

IC COMP R-RINOUT DUAL 8-MSOP

1277

MAX982CPA+

MAX982CPA+

Analog Devices, Inc.

COMPARATOR, 2 FUNC, 10000UV OFFS

8260

LT1011CS8#PBF

LT1011CS8#PBF

Analog Devices, Inc.

IC VOLTAGE COMPARATOR 5V 8-SOIC

5558

ADCMP602BRMZ

ADCMP602BRMZ

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN 8-MSOP

563

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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