Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
ADCMP392ARZ-RL7

ADCMP392ARZ-RL7

Analog Devices, Inc.

IC COMPARATOR DUAL R-R 8-SOIC

0

ADCMP609BRMZ-REEL

ADCMP609BRMZ-REEL

Analog Devices, Inc.

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

0

MAX976EUA

MAX976EUA

Analog Devices, Inc.

LOW-POWER COMPARATOR

11740

ADCMP602BRMZ-REEL

ADCMP602BRMZ-REEL

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN 8-MSOP

2851

LT6700IDCB-2#TRPBF

LT6700IDCB-2#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

0

MAX983CSA

MAX983CSA

Analog Devices, Inc.

SINGLE/DUAL-SUPPLY COMPARATOR

0

MAX985EUK-T

MAX985EUK-T

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

2500

LT6700IS6-2#TRPBF

LT6700IS6-2#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

ADCMP552BRQ

ADCMP552BRQ

Analog Devices, Inc.

COMPARATOR

22667

ADCMP601BKSZ-R2

ADCMP601BKSZ-R2

Analog Devices, Inc.

IC COMP TTL/CMOS 1CHAN SC70-6

1535

CMP05BJ

CMP05BJ

Analog Devices, Inc.

HIGH SPEED PRECISION COMPARATOR

267

MAX944CSD

MAX944CSD

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

242

ADCMP551BRQ

ADCMP551BRQ

Analog Devices, Inc.

COMPARATOR

32750

AD8611ARZ-REEL

AD8611ARZ-REEL

Analog Devices, Inc.

IC COMP SGL 4NS ULTRFAST 8SOIC

0

ADCMP552BRQZ

ADCMP552BRQZ

Analog Devices, Inc.

IC COMPARATOR PECL/LVPECL 20QSOP

235

LT6700HS6-3#TRPBF

LT6700HS6-3#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

LTC6754ISC6#TRPBF

LTC6754ISC6#TRPBF

Analog Devices, Inc.

IC COMPARATOR R-R 6SC70

0

ADCMP581BCPZ-RL7

ADCMP581BCPZ-RL7

Analog Devices, Inc.

IC COMPARATOR ECL UFAST 16-LFCSP

0

AD96687BP

AD96687BP

Analog Devices, Inc.

DUAL COMPARATOR

6518

MAX901BCPE

MAX901BCPE

Analog Devices, Inc.

LOW-POWER VOLTAGE COMPARATOR

2002

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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