Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
MAX9100ESA

MAX9100ESA

Analog Devices, Inc.

MAX9100 MICROPOWER COMPARATOR

2290

ADCMP580BCPZ-RL7

ADCMP580BCPZ-RL7

Analog Devices, Inc.

IC COMPARATOR CML UFAST 16-LFCSP

2143

LT6700HVIS6-1#TRMPBF

LT6700HVIS6-1#TRMPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

2669

LT6700HVHS6-2#TRPBF

LT6700HVHS6-2#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

ADCMP566BCPZ

ADCMP566BCPZ

Analog Devices, Inc.

IC COMP DUAL ULTRA-FAST 32LFCSP

15

LTC1442CN8#PBF

LTC1442CN8#PBF

Analog Devices, Inc.

IC COMP W/REF LP DUAL 8-DIP

463

HMC874LC3CTR-R5

HMC874LC3CTR-R5

Analog Devices, Inc.

IC COMPARATOR RSPECL 16SMD

0

MAX942CSA

MAX942CSA

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

1358

MAX516BENG+

MAX516BENG+

Analog Devices, Inc.

MAX516 QUAD COMPARATOR WITH PROG

480

MAX907ESA-T

MAX907ESA-T

Analog Devices, Inc.

SINGLE-SUPPLY TTL COMPARATOR

27457

LTC1440IN8#PBF

LTC1440IN8#PBF

Analog Devices, Inc.

IC COMP W/REF LP SINGLE 8-DIP

0

MAX981EPA+

MAX981EPA+

Analog Devices, Inc.

MAX981 ULTRA-LOW-POWER, OPEN-DRA

5714

LTC1540CMS8#TRPBF

LTC1540CMS8#TRPBF

Analog Devices, Inc.

IC COMP NANOPOWER W/REF 8-MSOP

5780

LTC1445CN#PBF

LTC1445CN#PBF

Analog Devices, Inc.

IC COMP W/REF LOWPWR QUAD 16-DIP

0

MAX903CSA-T

MAX903CSA-T

Analog Devices, Inc.

LOW-POWER VOLTAGE COMPARATOR

150

MAX9120EXK-T

MAX9120EXK-T

Analog Devices, Inc.

COMPARATOR WITHOUT REFERENCE

23725

AD96687BR

AD96687BR

Analog Devices, Inc.

DUAL COMPARATOR

15204

ADCMP573BCP-RL7

ADCMP573BCP-RL7

Analog Devices, Inc.

COMPARATOR

11337

LT6700HDCB-3#TRPBF

LT6700HDCB-3#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

0

LT6700HDCB-1#TRPBF

LT6700HDCB-1#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF 6-DFN

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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