Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
AD790SQ

AD790SQ

Analog Devices, Inc.

IC COMPARATOR PREC W/LATCH 8CDIP

77

LT6700CS6-2#TRPBF

LT6700CS6-2#TRPBF

Analog Devices, Inc.

IC COMP DUAL 400MV REF TSOT23-6

0

ADCMP671-1YUJZ-RL7

ADCMP671-1YUJZ-RL7

Analog Devices, Inc.

IC MONITOR UV/OV LP ADJ 6TSOT

1773

AD8611ARZ-REEL7

AD8611ARZ-REEL7

Analog Devices, Inc.

IC COMP SGL 4NS ULTRFAST 8SOIC

1391

LTC1444CN#PBF

LTC1444CN#PBF

Analog Devices, Inc.

ULTRALOW POWER QUAD COMPARATOR W

200

MAX923ESA-T

MAX923ESA-T

Analog Devices, Inc.

SINGLE-SUPPLY COMPARATOR

7500

MAX9120ESA+

MAX9120ESA+

Analog Devices, Inc.

MAX9120 SC70, 1.6V, NANOPOWER, B

45400

MAX9693EEE+

MAX9693EEE+

Analog Devices, Inc.

COMPARATOR, 2 FUNC, 11500UV OFFS

12435

MAX903ESA

MAX903ESA

Analog Devices, Inc.

LOW-POWER VOLTAGE COMPARATOR

8036

AD846AR-16-REEL

AD846AR-16-REEL

Analog Devices, Inc.

FAST, R-R, LOW POWER COMPARATOR

75956

LT1116CN8#PBF

LT1116CN8#PBF

Analog Devices, Inc.

IC COMPARATOR 12NS SINGLE 8-DIP

273

MAX962ESA

MAX962ESA

Analog Devices, Inc.

DUAL HIGH SPEED COMPARATOR

3519

ADCMP361YRJZ-REEL7

ADCMP361YRJZ-REEL7

Analog Devices, Inc.

IC COMPARATOR SINGLE OD SOT23-5

6519

CMP02CJ

CMP02CJ

Analog Devices, Inc.

LOW CURRENT PRECISION COMPARATOR

493

LT1017CS8#TRPBF

LT1017CS8#TRPBF

Analog Devices, Inc.

IC COMPARATOR MICRPWR DUAL 8SOIC

1607

AD96687BPZ

AD96687BPZ

Analog Devices, Inc.

IC COMPARATOR DUAL 2.5NS 20-PLCC

121

ADCMP580BCP-WP

ADCMP580BCP-WP

Analog Devices, Inc.

COMPARATOR, 1 FUNC, 10000UV OFFS

5671

LTC6752IUD-3#TRPBF

LTC6752IUD-3#TRPBF

Analog Devices, Inc.

IC COMPARATOR 280MHZ 12QFN

0

CMP01J

CMP01J

Analog Devices, Inc.

FAST PRECISION COMPARATOR

3302

LTC1843IS8#PBF

LTC1843IS8#PBF

Analog Devices, Inc.

IC COMP ULTLOPWR W/REF DL 8SOIC

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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