Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX971EPA+

MAX971EPA+

Analog Devices, Inc.

MAX971 ULTRA-LOW-POWER, OPEN-DRA

1143

AD8561ARU-REEL

AD8561ARU-REEL

Analog Devices, Inc.

COMPARATOR

5230

LT6700HS6-1#TRPBF

LT6700HS6-1#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

MAX981CUA

MAX981CUA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

0

LTC1444IDHD#TRPBF

LTC1444IDHD#TRPBF

Analog Devices, Inc.

IC COMP QD LP 1.221VREF 16-DFN

0

ADCMP580BCPZ-R2

ADCMP580BCPZ-R2

Analog Devices, Inc.

COMPARATOR

8199

LT1016IN8#PBF

LT1016IN8#PBF

Analog Devices, Inc.

IC COMPARATOR 10NS HI-SPEED 8DIP

42

LT6703HVIS5-2#TRPBF

LT6703HVIS5-2#TRPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF TSOT23-5

0

LT6700MPDCB-1#TRMPBF

LT6700MPDCB-1#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

2550

PM219Y

PM219Y

Analog Devices, Inc.

DUAL COMPARATOR

0

LT6703HVCS5-2#TRMPBF

LT6703HVCS5-2#TRMPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF TSOT23-5

1085

ADCMP371AKSZ-REEL7

ADCMP371AKSZ-REEL7

Analog Devices, Inc.

IC COMPARATOR PUSH-PULL SC70-5

12526

LT1017IS8#TRPBF

LT1017IS8#TRPBF

Analog Devices, Inc.

IC COMPARATOR MICRPWR DUAL 8SOIC

4572

LT6700HVHS6-1#TRMPBF

LT6700HVHS6-1#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

1100

MAX9100EUK-T

MAX9100EUK-T

Analog Devices, Inc.

MAX9100 MICROPOWER COMPARATOR

0

MAX9021AXK-T

MAX9021AXK-T

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

42256

LT6700MPDCB-3#TRPBF

LT6700MPDCB-3#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

0

MAX9017AEKA-T

MAX9017AEKA-T

Analog Devices, Inc.

DUAL COMPARATORS WITH REFERENCE

4755

PM119Y

PM119Y

Analog Devices, Inc.

DUAL COMPARATOR

2134

LT1720IMS8#PBF

LT1720IMS8#PBF

Analog Devices, Inc.

IC COMPARATOR DUAL HS 3/5V 8MSOP

915

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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