Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
LTC1841CS8#PBF

LTC1841CS8#PBF

Analog Devices, Inc.

IC COMP ULT LP W/REF DUAL 8SOIC

0

AD96685BRZ-REEL

AD96685BRZ-REEL

Analog Devices, Inc.

COMPARATOR, 3000UV OFFSET-MAX, P

1587

LT1011ACN8#PBF

LT1011ACN8#PBF

Analog Devices, Inc.

IC VOLTAGE COMPARATOR 5V 8-DIP

380

MAX9686BCSA

MAX9686BCSA

Analog Devices, Inc.

MAX9686 TTL VOLTAGE

3341

ADCMP394ARZ-RL7

ADCMP394ARZ-RL7

Analog Devices, Inc.

IC COMPARATOR SGL RRO 8SOIC

0

MAX988EUK-T

MAX988EUK-T

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

3890

LT1719IS8#TRPBF

LT1719IS8#TRPBF

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE 8-SOIC

1859

MAX9109EXT-T

MAX9109EXT-T

Analog Devices, Inc.

LOW-POWER, TTL COMPARATOR

0

ADCMP572BCPZ-R2

ADCMP572BCPZ-R2

Analog Devices, Inc.

IC COMPARATOR CML 3.3-5V 16LFCSP

87

AD8611ARM-R2

AD8611ARM-R2

Analog Devices, Inc.

COMPARATOR

22438

LT1716IS5#TRMPBF

LT1716IS5#TRMPBF

Analog Devices, Inc.

IC COMP OTT R-R 44V TSOT-23-5

6121

LT6703HVIS5-3#TRPBF

LT6703HVIS5-3#TRPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF TSOT23-5

0

LT6703HDC-2#TRPBF

LT6703HDC-2#TRPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF 3-DFN

0

MAX917EUK-T

MAX917EUK-T

Analog Devices, Inc.

COMPARATOR WITH REFERENCE

2500

MAX982CSA

MAX982CSA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

0

LTC6754HSC6#TRMPBF

LTC6754HSC6#TRMPBF

Analog Devices, Inc.

IC COMPARATOR R-R 6SC70

793

LTC6752HS5#TRPBF

LTC6752HS5#TRPBF

Analog Devices, Inc.

IC COMP R-R CMOS 280MHZ TSOT23-5

0

LTC6754HSC6#TRPBF

LTC6754HSC6#TRPBF

Analog Devices, Inc.

IC COMPARATOR R-R 6SC70

0

AD8561AR

AD8561AR

Analog Devices, Inc.

COMPARATOR

69

LT1719CS8#PBF

LT1719CS8#PBF

Analog Devices, Inc.

IC COMP R-R I/O SGL 3/5V 8-SOIC

1563

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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