Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
ADCMP608BKSZ-REEL7

ADCMP608BKSZ-REEL7

Analog Devices, Inc.

IC COMPARATOR TTL/CMOS SC70-6

10034

LTC6702CDC#TRPBF

LTC6702CDC#TRPBF

Analog Devices, Inc.

IC COMP LOW VOLT 8-DFN

0

MAX9030AXT-T

MAX9030AXT-T

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

10000

MAX9042BESA+

MAX9042BESA+

Analog Devices, Inc.

MAX9042 MICROPOWER, SINGLE-SUPPL

580

ADCMP394ARZ

ADCMP394ARZ

Analog Devices, Inc.

IC COMPARATOR SGL RRO 8SOIC

579

CMP401GRU-REEL

CMP401GRU-REEL

Analog Devices, Inc.

LOW VOLTAGE COMPARATOR

19115

LT1719IS6#TRMPBF

LT1719IS6#TRMPBF

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE SOT23-6

16277

ADCMP553BRMZ

ADCMP553BRMZ

Analog Devices, Inc.

IC COMPARATOR PECL/LVPECL 8MSOP

5118

LTC1440IDD#TRPBF

LTC1440IDD#TRPBF

Analog Devices, Inc.

IC COMP SGL LP 1.182V REF 8-DFN

0

LTC1444CDHD#TRPBF

LTC1444CDHD#TRPBF

Analog Devices, Inc.

IC COMP QD LP 1.221VREF 16-DFN

0

LT1719CS6#TRMPBF

LT1719CS6#TRMPBF

Analog Devices, Inc.

IC COMP R-RINOUT SINGLE SOT23-6

2715

MAX969ESE

MAX969ESE

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

2225

MAX933EPA

MAX933EPA

Analog Devices, Inc.

COMPARATOR WITH REFERENCE

2264

CMP01CJ

CMP01CJ

Analog Devices, Inc.

FAST PRECISION COMPARATOR

39

MAX9040BEUK+T

MAX9040BEUK+T

Analog Devices, Inc.

MAX9040 MICROPOWER, SINGLE-SUPPL

11834

LT6700CS6-1#TRPBF

LT6700CS6-1#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

8094

MAX970EEE

MAX970EEE

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

50

MAX992EUA

MAX992EUA

Analog Devices, Inc.

RAIL-TO-RAIL I/O COMPARATOR

3074

LT6700MPS6-3#TRMPBF

LT6700MPS6-3#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

388

MAX942CSA-T

MAX942CSA-T

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

4900

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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