Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
LTC1540IS8#TRPBF

LTC1540IS8#TRPBF

Analog Devices, Inc.

IC COMP NANOPOWER W/REF 8-SOIC

4874

ADCMP393ARZ

ADCMP393ARZ

Analog Devices, Inc.

IC COMPARATOR QUAD RRO 14SOIC

1052

ADCMP606BKSZ-REEL7

ADCMP606BKSZ-REEL7

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SC70-6

3286

LT1721IS#TRPBF

LT1721IS#TRPBF

Analog Devices, Inc.

IC COMP R-RINOUT QUAD 16SOIC

0

LTC6752IMS8-2#PBF

LTC6752IMS8-2#PBF

Analog Devices, Inc.

IC COMPARATOR 280MHZ 8MSOP

0

MAX9117EXK-T

MAX9117EXK-T

Analog Devices, Inc.

COMPARATOR WITH REFERENCE

67710

LT6700HVIS6-2#TRPBF

LT6700HVIS6-2#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

PM111Y

PM111Y

Analog Devices, Inc.

COMPASRSATOR

0

MAX973CSA

MAX973CSA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

1302

MAX988ESA

MAX988ESA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

0

DS56S

DS56S

Analog Devices, Inc.

DS56 DUAL TEMPERATURE COMPARATOR

5204

MAX901AESE-T

MAX901AESE-T

Analog Devices, Inc.

LOW-POWER VOLTAGE COMPARATOR

0

AD8465WBCPZ-WP

AD8465WBCPZ-WP

Analog Devices, Inc.

IC COMPARATOR 1CH LVDS 12LFCSP

0

LTC1445IN#PBF

LTC1445IN#PBF

Analog Devices, Inc.

IC COMP W/REF LOWPWR QUAD 16-DIP

0

LT1018CS8#TRPBF

LT1018CS8#TRPBF

Analog Devices, Inc.

IC COMPARATOR MICRPWR DUAL 8SOIC

0

LMX393HAUA+T

LMX393HAUA+T

Analog Devices, Inc.

LOW-VOLTAGE, DUAL COMPARATOR

12300

LT1714IGN#TRPBF

LT1714IGN#TRPBF

Analog Devices, Inc.

IC COMP R-RINOUT DUAL 16-SSOP

0

ADCMP551BRQZ

ADCMP551BRQZ

Analog Devices, Inc.

IC COMPARATOR PECL/LVPECL 16QSOP

795

CMP04FSZ

CMP04FSZ

Analog Devices, Inc.

IC COMP QUAD LOW PWR 14SOIC

593

MAX922CPA

MAX922CPA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

1485

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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