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Linear - Comparators

Image Part Number Description / PDF Quantity Rfq
AS393AMTR-G1

AS393AMTR-G1

Zetex Semiconductors (Diodes Inc.)

IC COMP OPEN COLLECTOR 8SOIC

0
AS393P-E1

AS393P-E1

Zetex Semiconductors (Diodes Inc.)

IC COMP OPEN COLLECTOR 8DIP

3502
LM2903M8-13

LM2903M8-13

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR DUAL DIFF 8MSOP

2147483647
LM2903ATH-13

LM2903ATH-13

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR DUAL DIFF 8TSSOP

1640
AZV331KSTR-E1

AZV331KSTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OP AMP GP LOW VOLT SC70-5

3000
AS393MTR-G1

AS393MTR-G1

Zetex Semiconductors (Diodes Inc.)

IC COMP OPEN COLLECTOR 8SOIC

270
AZV331KTR-E1

AZV331KTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OP AMP GP LOW VOLT SOT23-5

0
LM2901AT14-13

LM2901AT14-13

Zetex Semiconductors (Diodes Inc.)

IC COMP DIFF QUAD 14TSSOP

0
LM2903AQS-13

LM2903AQS-13

Zetex Semiconductors (Diodes Inc.)

IC COMP DUAL DIFFERENTIAL 8SO

130210000
AZV331KTR-G1

AZV331KTR-G1

Zetex Semiconductors (Diodes Inc.)

IC COMP LOW PWR/OFFSET V SOT23-5

66013
AP393ASG-13

AP393ASG-13

Zetex Semiconductors (Diodes Inc.)

IC COMP DUAL LOW POWER 8-SOIC

0
LM2903S-13

LM2903S-13

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR DUAL 8-SO

0
LM2903AM8-13

LM2903AM8-13

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR DUAL DIFF 8MSOP

0
AZV393GTR-E1

AZV393GTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OP AMP GP DUAL 8-TSSOP

0
APX393SG-13

APX393SG-13

Zetex Semiconductors (Diodes Inc.)

IC OP AMP R-R DUAL 8-SOIC

0
AS339MTR-E1

AS339MTR-E1

Zetex Semiconductors (Diodes Inc.)

IC COMP LOW PWR/OFFSET V 14SOIC

3930
LM2901QT14-13

LM2901QT14-13

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR QUAD DIFF TSSOP-14

12500
LM2903AS-13

LM2903AS-13

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR DUAL 8-SO

35000
AZV393MTR-E1

AZV393MTR-E1

Zetex Semiconductors (Diodes Inc.)

IC OP AMP GP DUAL 8-MSOP

0
LMV331W5-7

LMV331W5-7

Zetex Semiconductors (Diodes Inc.)

IC COMPARATOR TINY LV SOT25

1544

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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