Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
LTC1842IS8#PBF

LTC1842IS8#PBF

Analog Devices, Inc.

IC COMP ULTLOPWR W/REF DL 8SOIC

0

LT6703CDC-3#TRMPBF

LT6703CDC-3#TRMPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF 3-DFN

0

MAX9053BEUB

MAX9053BEUB

Analog Devices, Inc.

SINGLE-SUPPLY, COMPARATOR

3550

LTC1842CS8#PBF

LTC1842CS8#PBF

Analog Devices, Inc.

IC COMP ULTLOPWR W/REF DUAL8SOIC

336

LT1720IS8#PBF

LT1720IS8#PBF

Analog Devices, Inc.

IC COMP R-RINOUT DUAL 8-SOIC

597

MAX9024ASD

MAX9024ASD

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

2313

LTC1540CS8#PBF

LTC1540CS8#PBF

Analog Devices, Inc.

IC COMP NANOPOWER W/REF 8-SOIC

3000

MAX999AAUK+T

MAX999AAUK+T

Analog Devices, Inc.

MAX999 SINGLE, ULTRA-HIGH-SPEED,

106

LT6700IS6-1#TRPBF

LT6700IS6-1#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

2498

LTC1440CS8#TRPBF

LTC1440CS8#TRPBF

Analog Devices, Inc.

IC COMP W/REF LP SINGLE 8-SOIC

2147

AD8611ARM-REEL

AD8611ARM-REEL

Analog Devices, Inc.

COMPARATOR

14285

MAX975ESA

MAX975ESA

Analog Devices, Inc.

DUAL-SPEED COMPARATOR

0

HMC974LC3CTR

HMC974LC3CTR

Analog Devices, Inc.

IC WINDOW COMP 10GHZ 16SMT

0

LT1713IMS8#PBF

LT1713IMS8#PBF

Analog Devices, Inc.

IC COMP R-R IN/OUT SINGLE 8-MSOP

1249

AD8612ARUZ

AD8612ARUZ

Analog Devices, Inc.

IC COMP DUAL 4NS FAST 14-TSSOP

1081

LT1719IS6#TRPBF

LT1719IS6#TRPBF

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE SOT23-6

1846

LTC6702IDC#TRPBF

LTC6702IDC#TRPBF

Analog Devices, Inc.

IC COMP LOW VOLT 8-DFN

0

JM38510/10304BGA

JM38510/10304BGA

Analog Devices, Inc.

MIL GRADE PM111J/883C

1013

PM139Y

PM139Y

Analog Devices, Inc.

QUAD COMPARATOR

651

LTC1445CDHD#TRPBF

LTC1445CDHD#TRPBF

Analog Devices, Inc.

IC COMP QD LP 1.221VREF 16-DFN

0

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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