Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
LT1720CDD#TRPBF

LT1720CDD#TRPBF

Analog Devices, Inc.

IC COMP R-R IN/OUT DUAL 8DFN

0

AD8612ARU

AD8612ARU

Analog Devices, Inc.

COMPARATOR

12201

LTC1445CS#TRPBF

LTC1445CS#TRPBF

Analog Devices, Inc.

IC COMP W/REF LOWPWR QUAD 16SOIC

0

MAX932CUA

MAX932CUA

Analog Devices, Inc.

COMPARATOR WITH REFERENCE

1366

MAX9027EBT-T

MAX9027EBT-T

Analog Devices, Inc.

NANOPOWER COMPARATOR

7053

LTC1445IDHD#PBF

LTC1445IDHD#PBF

Analog Devices, Inc.

IC COMP QD LP 1.221VREF 16-DFN

2853

MAX912CSE

MAX912CSE

Analog Devices, Inc.

PRECISION TTL COMPARATOR

478

AD790JNZ

AD790JNZ

Analog Devices, Inc.

IC PREC COMPARATOR HS 8-DIP

85

MAX9013ESA

MAX9013ESA

Analog Devices, Inc.

PRECISION TTL COMPARATOR

0

ADCMP396ARZ

ADCMP396ARZ

Analog Devices, Inc.

COMPARATOR, 4 FUNC, 5000UV OFFSE

4923

MAX934CSE

MAX934CSE

Analog Devices, Inc.

COMPARATOR WITH REFERENCE

30659

AD8561ARZ

AD8561ARZ

Analog Devices, Inc.

IC COMPARATOR SNGL 7NS 8-SOIC

1318

ADCMP395ARMZ-RL7

ADCMP395ARMZ-RL7

Analog Devices, Inc.

IC COMPARATOR DUAL RRO 10MSOP

0

LTC1441IS8#PBF

LTC1441IS8#PBF

Analog Devices, Inc.

IC COMP W/REF LP DUAL 8-SOIC

699

ADCMP600BKSZ-R2

ADCMP600BKSZ-R2

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SC70-5

751

LTC1442CS8#TRPBF

LTC1442CS8#TRPBF

Analog Devices, Inc.

IC COMP W/REF LP DUAL 8-SOIC

0

ADCMP606BKSZ-R2

ADCMP606BKSZ-R2

Analog Devices, Inc.

COMPARATOR

10824

LTC1443IDHD#PBF

LTC1443IDHD#PBF

Analog Devices, Inc.

IC COMP QD LP 1.182VREF 16-DFN

0

LTC1441IS8#TRPBF

LTC1441IS8#TRPBF

Analog Devices, Inc.

IC COMP W/REF LP DUAL 8-SOIC

0

CMP402GS

CMP402GS

Analog Devices, Inc.

LOW VOLTAGE COMPARATOR

4135

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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