Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX941CSA

MAX941CSA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

0

LT6700HVCS6-2#TRMPBF

LT6700HVCS6-2#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

LTC1540CDD#TRPBF

LTC1540CDD#TRPBF

Analog Devices, Inc.

IC COMP NANOPOWER W/REF 8DFN

0

MAX941CPA

MAX941CPA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

0

LT1720IDD#PBF

LT1720IDD#PBF

Analog Devices, Inc.

IC COMPARATOR DUAL HS 3/5V 8-DFN

6652

LT1716IS5#TRPBF

LT1716IS5#TRPBF

Analog Devices, Inc.

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

18143

LTC6752HSC6-4#TRMPBF

LTC6752HSC6-4#TRMPBF

Analog Devices, Inc.

IC COMP R-R CMOS 280MHZ SC70-6

873

MAX972ESA-T

MAX972ESA-T

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

7350

ADCMP566BCP

ADCMP566BCP

Analog Devices, Inc.

COMPARATOR, 2 FUNC, 5000UV OFFSE

7061

LTC6752HSC6-1#TRPBF

LTC6752HSC6-1#TRPBF

Analog Devices, Inc.

IC COMP R-R CMOS 280MHZ SC70-6

0

HMC675LC3CTR-R5

HMC675LC3CTR-R5

Analog Devices, Inc.

IC COMPARATOR RSPECL 16SMD

0

LTC1440IMS8#TRPBF

LTC1440IMS8#TRPBF

Analog Devices, Inc.

IC COMP SGL LP 1.182V REF 8-MSOP

2470

ADCMP354YKSZ-REEL7

ADCMP354YKSZ-REEL7

Analog Devices, Inc.

IC COMP/REF OD ACTIVE HI SC70-4

20371

CMP04FS

CMP04FS

Analog Devices, Inc.

QUAD PRECISION COMPARATOR

0

LTC6702CDC#TRMPBF

LTC6702CDC#TRMPBF

Analog Devices, Inc.

IC COMP LOW VOLT 8-DFN

0

LT6700HVIS6-3#TRPBF

LT6700HVIS6-3#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

CMP08FZ

CMP08FZ

Analog Devices, Inc.

HIGH SPEED COMPARATOR

7579

LT6700MPS6-1#TRPBF

LT6700MPS6-1#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

LT1712CGN#PBF

LT1712CGN#PBF

Analog Devices, Inc.

IC COMPARATR RRIO DUAL LP 16SSOP

114

ADCMP343YRJZ-REEL7

ADCMP343YRJZ-REEL7

Analog Devices, Inc.

IC COMPARATOR DUAL OD SOT23-8

2105

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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