Linear - Comparators

Part Number	Description / PDF	Quantity
LM2901PWR Texas Instruments	IC QUAD DIFF COMPARATOR 14-TSSOP	0
LM239AMDREP Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	4259
TLV6700QDSERQ1 Texas Instruments	AUTOMOTIVE LOW-POWER WINDOW COMP	3000
LM339PW Texas Instruments	IC QUAD DIFF COMPARATOR 14-TSSOP	0
TLV4021R2YKAR Texas Instruments	COMPARATOR WITH FIXED REFERENCE	1407
LMV7219M5/NOPB Texas Instruments	IC COMPARATOR R-R OUT SOT23-5	14692
LMC7225IM5X/NOPB Texas Instruments	IC COMPAR MCRPWR CMOS RR SOT23-5	749
TLV3701IDR Texas Instruments	IC COMPARATOR NANOPWR P-P 8-SOIC	0
TLV6713DDCT Texas Instruments	TLV6713 36-V COMPARATOR WITH INT	1846
LMC7221BIM5X/NOPB Texas Instruments	IC COMPAR TNY CMOS RR IN SOT23-5	3655
LMV7271MG/NOPB Texas Instruments	IC COMP 1.8V SNGL R-R IN SC70-5	9665
LM339NE4 Texas Instruments	IC QUAD DIFF COMPARATOR 14-DIP	1365
TLV3402IDGKG4 Texas Instruments	IC DUAL NANOPWR COMP 8VSSOP	0
TLV3402CD Texas Instruments	IC DUAL NANOPWR COMP 8-SOIC	249
TLV3012AIDCKT Texas Instruments	IC COMPARATOR 1.8V W/REF SC70-6	1207
LM239D Texas Instruments	IC QUAD DIFF COMP 14-SOIC	225210000
TPS3701DDCR Texas Instruments	IC COMP WINDOW W/REF 6SOT	0
LMV7271MF/NOPB Texas Instruments	IC COMP 1.8V SNGL R-R IN SOT23-5	326
LM2903DG4 Texas Instruments	IC DUAL GP DIFF COMPARATR 8-SOIC	499
TLV3501AZQDBVRQ1 Texas Instruments	IC COMPARATOR 4.5NS R-R SOT23-6	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

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