Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX9119EXK-T

MAX9119EXK-T

Analog Devices, Inc.

COMPARATOR WITHOUT REFERENCE

1706

ADCMP604BKSZ-REEL7

ADCMP604BKSZ-REEL7

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SC70-6

1591

ADCMP370AKSZ-REEL7

ADCMP370AKSZ-REEL7

Analog Devices, Inc.

IC COMPARATOR OPEN-DRAIN SC70-5

6802

ADCMP601BKSZ-REEL7

ADCMP601BKSZ-REEL7

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SC70-6

13148

CMP04FSZ-REEL

CMP04FSZ-REEL

Analog Devices, Inc.

IC COMP QUAD LOW PWR 14SOIC

2792

ADCMP562BRQ

ADCMP562BRQ

Analog Devices, Inc.

COMPARATOR

16499

LT1721IS#PBF

LT1721IS#PBF

Analog Devices, Inc.

IC COMP R-RINOUT QUAD 16-SOIC

94

5962-8987101GA

5962-8987101GA

Analog Devices, Inc.

PRECISION COMPARATOR (CMP01J)

67

MAX970ESD

MAX970ESD

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

0

MAX942EUA

MAX942EUA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

10594

MAX901BESE

MAX901BESE

Analog Devices, Inc.

LOW-POWER VOLTAGE COMPARATOR

0

LT1716HS5#WTRPBF

LT1716HS5#WTRPBF

Analog Devices, Inc.

44V OVER-THE-TOP, UW, PREC RR IN

0

MXL1016IS8

MXL1016IS8

Analog Devices, Inc.

FAST PRECISION TTL COMPARATOR

24

MAX983CUA+

MAX983CUA+

Analog Devices, Inc.

MAX983 ULTRA-LOW-POWER, OPEN-DRA

1745

AD8611ARZ

AD8611ARZ

Analog Devices, Inc.

IC COMP SNGL 4NS ULTRFAST 8-SOIC

475

MAX991ESA

MAX991ESA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

2570

MAX971CUA-T

MAX971CUA-T

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

2500

MAX981ESA

MAX981ESA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

1220

MAX9020EKA-T

MAX9020EKA-T

Analog Devices, Inc.

DUAL COMPARATORS

417

LT6700MPDCB-3#TRMPBF

LT6700MPDCB-3#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

1368

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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