Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX9693EPE

MAX9693EPE

Analog Devices, Inc.

ECL-OUTPUT COMPARATOR

2256

LT1713IMS8#TRPBF

LT1713IMS8#TRPBF

Analog Devices, Inc.

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

0

LT1017IN8#PBF

LT1017IN8#PBF

Analog Devices, Inc.

IC COMPARATOR MICROPWR DUAL 8DIP

183

LTC1440CDD#TRPBF

LTC1440CDD#TRPBF

Analog Devices, Inc.

IC COMP SGL LP 1.182V REF 8-DFN

0

LTC1440CS8#PBF

LTC1440CS8#PBF

Analog Devices, Inc.

IC COMP W/REF LP SINGLE 8-SOIC

2180

MAX972CUA

MAX972CUA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

1143

MAX984CSE

MAX984CSE

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

0

MAX968EUA

MAX968EUA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

8550

LT1671CMS8#PBF

LT1671CMS8#PBF

Analog Devices, Inc.

IC COMPARATOR 60NS LOW PWR 8MSOP

2539

LT6703IDC-3#TRPBF

LT6703IDC-3#TRPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF 3-DFN

0

LTC6752ISC6-1#TRMPBF

LTC6752ISC6-1#TRMPBF

Analog Devices, Inc.

IC COMP R-R CMOS 280MHZ SC70-6

0

LT1721CS#PBF

LT1721CS#PBF

Analog Devices, Inc.

IC COMP R-RINOUT QUAD 16-SOIC

1

MAX907CPA

MAX907CPA

Analog Devices, Inc.

SINGLE-SUPPLY TTL COMPARATOR

8104

MAX997ESA

MAX997ESA

Analog Devices, Inc.

HIGH SPEED COMPARATOR

0

AD8564AN

AD8564AN

Analog Devices, Inc.

QUAD COMPARATOR

80037

MAX977ESD+

MAX977ESD+

Analog Devices, Inc.

MAX977 DUAL +5V DUAL-SPEED COMPA

1114

MAX991EUA

MAX991EUA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

19033

LT1712IGN#TRPBF

LT1712IGN#TRPBF

Analog Devices, Inc.

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

0

LT1711IMS8#PBF

LT1711IMS8#PBF

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE 8-MSOP

222

MAX907CSA

MAX907CSA

Analog Devices, Inc.

SINGLE-SUPPLY TTL COMPARATOR

15484

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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