Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX969ESE+T

MAX969ESE+T

Analog Devices, Inc.

MAX969 QUAD, MICROPOWER, ULTRA-L

2000

MAX986ESA

MAX986ESA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

0

LT1721IGN#PBF

LT1721IGN#PBF

Analog Devices, Inc.

IC COMP R-RINOUT QUAD 16-SSOP

380

MAX985ESA

MAX985ESA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

6679

LTC6752IMS8-2#TRPBF

LTC6752IMS8-2#TRPBF

Analog Devices, Inc.

IC COMPARATOR 280MHZ 8MSOP

0

ADCMP392ARZ

ADCMP392ARZ

Analog Devices, Inc.

IC COMPARATOR QUAD RRO 8SOIC

1285

ADCMP670-1YUJZ-RL7

ADCMP670-1YUJZ-RL7

Analog Devices, Inc.

IC COMPARATOR DUAL OD TSOT-23-6

1772

AD8611ARMZ-R2

AD8611ARMZ-R2

Analog Devices, Inc.

IC COMP SNGL 4NS ULTRFAST 8-MSOP

27

LT6700IS6-1#TRMPBF

LT6700IS6-1#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

8617

ADCMP354YKS-REEL7

ADCMP354YKS-REEL7

Analog Devices, Inc.

COMPARATOR

36945

LT1011IS8#PBF

LT1011IS8#PBF

Analog Devices, Inc.

IC VOLTAGE COMPARATOR 5V 8-SOIC

387

ADCMP582BCPZ-WP

ADCMP582BCPZ-WP

Analog Devices, Inc.

IC COMPARATOR PECL UFAST 16LFCSP

20

LT1712IGN#PBF

LT1712IGN#PBF

Analog Devices, Inc.

IC COMP R-R I/O DUAL LP 16SSOP

276

LT6700IS6-3#TRMPBF

LT6700IS6-3#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

7609

LTC6702CTS8#TRMPBF

LTC6702CTS8#TRMPBF

Analog Devices, Inc.

IC COMP LOW VOLT TSOT23-8

0

JM38510/10304BPA

JM38510/10304BPA

Analog Devices, Inc.

MIL GRADE PM111

1413

LT1720CS8#TRPBF

LT1720CS8#TRPBF

Analog Devices, Inc.

IC COMP R-RINOUT DUAL 8-SOIC

0

LTC1440IS8#TRPBF

LTC1440IS8#TRPBF

Analog Devices, Inc.

IC COMP W/REF LP SINGLE 8-SOIC

6637

MAX923ESA

MAX923ESA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

10455

MAX996EUD

MAX996EUD

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

5288

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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