Linear - Comparators

Part Number	Description / PDF	Quantity
TLC339MDRG4 Texas Instruments	TLC339 QUAD, MICROPOWER, LINCMOS	5000
LM2901AVQPWRG4Q1 Texas Instruments	LM2901AV-Q1 AUTOMOTIVE PRECISION	12956
LMP7300MMX/NOPB Texas Instruments	LMP7300 MICROPOWER PRECISION COM	1920
TLV4031R1YKAR Texas Instruments	COMPARATOR WITH FIXED REFERENCE	2689
LM2901NSR Texas Instruments	IC DIFF COMPARATOR QUAD 14SO	0
LM339AM Texas Instruments	IC COMPARATOR QUAD LO PWR 14SOIC	1207
TLC374IDG4 Texas Instruments	COMPARATOR	300
LM293H/NOPB Texas Instruments	IC COMPARATOR LP DUAL TO99-8	0
TLV3402IDG4 Texas Instruments	TLV3402 DUAL NANO POWER HIGH-VOL	600
LM311DR Texas Instruments	IC DIFF COMP STROBE 8-SOIC	60760
LM2903VQPWRG4Q1 Texas Instruments	IC COMPARATOR DIFF DUAL 8TSSOP	3990
LM311DRG4 Texas Instruments	IC DIFF COMPARATOR STROBE 8-SOIC	0
LMC7211BIM5/NOPB Texas Instruments	IC COMPAR TINY R-R CMOS SOT23-5	27112
LM2901VQDRG4 Texas Instruments	LM2901V QUAD DIFFERENTIAL COMPAR	7500
TLC372MDRG4 Texas Instruments	IC DIFF COMPARATOR DUAL 8-SOIC	5358
TLV3402IDGKR Texas Instruments	IC COMPARATOR DUAL NANO 8VSSOP	5401
TLC3704IDG4 Texas Instruments	IC MICROPWR COMP QUAD 14-SOIC	0
LMV7219M7 Texas Instruments	COMPARATOR, 1 FUNC, 8000UV OFFSE	64460
TLV3501AIDBVRG4 Texas Instruments	IC COMP 4.5NS R-R HS SOT23-6	0
TLC372CPS Texas Instruments	COMPARATOR	7680

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