Linear - Comparators

Part Number	Description / PDF	Quantity
TLV3494AIPWR Texas Instruments	TLV3494 QUAD NANOPOWER PUSH-PULL	4020
TLV3704ID Texas Instruments	IC QUAD COMP P-P NANOPWR 14-SOIC	230
LM339ADE4 Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	0
TLV1391IDBVT Texas Instruments	IC DIFF COMPARATOR SNGL SOT23-5	1000
TLV3702IDR Texas Instruments	IC COMP DUAL P-P NANOPWR 8SOIC	5464
LM2901DE4 Texas Instruments	LM2901 QUAD DIFFERENTIAL COMPARA	1447
TLC3704QDRG4Q1 Texas Instruments	TLC3704-Q1 AUTOMOTIVE QUAD MICRO	11826
TLC393CP Texas Instruments	IC DUAL V COMP 8-DIP	551
LM2901AVQDRG4 Texas Instruments	IC COMPARATOR DIFF QUAD 14SOIC	6491
LM339ANSR Texas Instruments	IC QUAD DIFF COMPARATOR 14SO	2207
LMV339MTX Texas Instruments	COMPARATOR, 4 FUNC, 7000UV OFFSE	54997
TLV3404IDR Texas Instruments	IC COMP CMOS OPEN DRAIN 14-SOIC	2292
LM239DRG3 Texas Instruments	LM239 QUAD DIFFERENTIAL COMPARAT	12500
TLV7211IDR Texas Instruments	IC COMP R-R IN/P-P OUT 8-SOIC	0
TLV7032DGKR Texas Instruments	IC POWER MANAGEMENT SUPERVISORY	2088
TLV3702QDRQ1 Texas Instruments	TLV3702-Q1 AUTOMOTIVE NANOPOWER	6964
LM2901PWG4 Texas Instruments	IC DIFF COMPARATOR QUAD 14-TSSOP	0
LM2903QDR Texas Instruments	COMPARATOR	12500
TLC372CPWR Texas Instruments	IC DIFF COMPARATOR DUAL 8-TSSOP	4048
TLV1702AIRUGR Texas Instruments	IC COMPARATOR DUAL X2QFN	3713

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

Type	Functional Features	Application Examples
General-Purpose Comparators	Basic voltage comparison with moderate speed and accuracy	Simple threshold detection in appliances
Precision Comparators	Low offset voltage and high accuracy	Instrumentation and measurement equipment
High-Speed Comparators	Sub-nanosecond response times	RF signal processing and oscilloscopes
Low-Power Comparators	Ultra-low quiescent current	Battery-powered IoT devices
Window Comparators	Detect if input voltage falls within a defined range	Power 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

Parameter	Description	Importance
Input Offset Voltage	Maximum voltage difference required to switch output	Determines comparison accuracy
Propagation Delay	Time between input change and output response	Critical for high-speed applications
Supply Voltage Range	Operating voltage range (e.g., 2.7V-36V)	Dictates system power design
Power Consumption	Quiescent current under active/idle conditions	Battery life optimization
Hysteresis	Voltage margin to prevent oscillation near thresholds	Improves 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

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	LM393	Dual comparator, 2.0V-36V supply, 1.3 A quiescent current
STMicroelectronics	TLV3201	1.8V supply, 40ns propagation delay
Analog Devices	AD8561	Single-supply, 7ns response time
ON Semiconductor	NCS2250	Zero-drift architecture, 10 V offset

7. Selection Guidelines

Speed Requirements: Match propagation delay to system clock rates
Accuracy Needs: Select offset voltage <1mV for precision sensing
Power Constraints: Choose nano-power variants for portable devices
Environmental Factors: Consider temperature-rated parts (-40 C to +125 C)
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