Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
LTC6752MPS5#TRPBF

LTC6752MPS5#TRPBF

Analog Devices, Inc.

IC COMP R-R CMOS 280MHZ 5SOT-23

0

LT1720IS8#TRPBF

LT1720IS8#TRPBF

Analog Devices, Inc.

IC COMP R-RINOUT DUAL 8-SOIC

1314

LT6703HVCS5-3#TRPBF

LT6703HVCS5-3#TRPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF TSOT23-5

0

LTC1440IDD#PBF

LTC1440IDD#PBF

Analog Devices, Inc.

IC COMP SGL LP 1.182V REF 8-DFN

533

AD96687BRZ

AD96687BRZ

Analog Devices, Inc.

IC COMPARATOR DUAL 2.5NS 16-SOIC

859

LT6700HVCS6-3#TRMPBF

LT6700HVCS6-3#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

754

AD790JRZ

AD790JRZ

Analog Devices, Inc.

IC COMPARATOR PREC W/LATCH 8SOIC

1142

LT6703IDC-2#TRPBF

LT6703IDC-2#TRPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF 3-DFN

0

LTC6754HUD#TRPBF

LTC6754HUD#TRPBF

Analog Devices, Inc.

IC COMPARATOR R-R 12QFN

0

LT1719IS8#PBF

LT1719IS8#PBF

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE 8-SOIC

1309

MAX932CSA

MAX932CSA

Analog Devices, Inc.

COMPARATOR WITH REF

3207

LTC1843CS8#TRPBF

LTC1843CS8#TRPBF

Analog Devices, Inc.

IC COMP ULTLOPWR W/REF DL 8SOIC

0

LTC1440CN8#PBF

LTC1440CN8#PBF

Analog Devices, Inc.

IC COMP W/REF LP SINGLE 8-DIP

599

AD8561ARZ-REEL

AD8561ARZ-REEL

Analog Devices, Inc.

IC COMP 7NS ULTRA-FAST 8-SOIC

4668

ADCMP609BRMZ

ADCMP609BRMZ

Analog Devices, Inc.

IC COMP TTL/CMOS R-R SGL 8-MSOP

866

LT6700HVHS6-3#TRPBF

LT6700HVHS6-3#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

ADCMP573BCP-WP

ADCMP573BCP-WP

Analog Devices, Inc.

COMPARATOR

8550

ADCMP561BRQ

ADCMP561BRQ

Analog Devices, Inc.

COMPARATOR

3854

LT6703HVHS5-3#TRMPBF

LT6703HVHS5-3#TRMPBF

Analog Devices, Inc.

IC COMPARATOR 400MV REF TSOT23-5

4691

LTC6702CTS8#TRPBF

LTC6702CTS8#TRPBF

Analog Devices, Inc.

IC COMP LOW VOLT TSOT23-8

0

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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