Linear - Comparators

Part Number	Description / PDF	Quantity
LM111LB Texas Instruments	COMPARATOR, 200NS RESPONSE TIME,	1916
LM239AN Texas Instruments	COMPARATOR, 4 FUNC, 4000UV OFFSE	6594
TL712CPWRE4 Texas Instruments	IC DIFF COMPARATOR 8-TSSOP	0
TLC372IDR Texas Instruments	TLC372 DUAL GENERAL PURPOSE LINC	219
TLV3404CPW Texas Instruments	TLV3404 QUAD NANOPOWER HIGH-VOLT	5761
LM2903D Texas Instruments	IC DUAL DIFF COMPARATOR 8-SOIC	31249975
TLC372CDRG4 Texas Instruments	IC DIFF COMP DUAL 8-SOIC	0
TLC339CD Texas Instruments	TLC339 QUAD, MICROPOWER, LINCMOS	53506
LMC7221BIM5/NOPB Texas Instruments	IC COMPAR TINY R-R CMOS SOT23-5	7792
TL3116IDR Texas Instruments	IC PREC COMP ULTRA-FAST 8-SOIC	0
LM2903BQPWRQ1 Texas Instruments	AUTOMOTIVE QUALIFIED DUAL DIFFER	5990
LM2903BIDGKR Texas Instruments	DUAL INDUSTRIAL GRADE STANDARD C	0
TLV3202AIDGK Texas Instruments	IC COMPAR PWR RRI DL PP 8VSSOP	871
TLV3701IDBVRG4 Texas Instruments	IC COMPARATR NANOPWR P-P SOT23-5	0
LM3302D Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	257
SM72375MMX/NOPB Texas Instruments	COMPARATOR	114950
TLV3702QDRG4Q1 Texas Instruments	IC COMP DUAL P-P NANOPWR 8SOIC	55
TLV6700DDCR Texas Instruments	WIDE SUPPLY COMPARATOR	3452
LM139D Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	1456
LM293DR Texas Instruments	IC COMPARATOR DIFF DUAL 8SOIC	1175

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