Linear - Comparators

Part Number	Description / PDF	Quantity
ADCMP563BRQZ Analog Devices, Inc.	IC COMPARATOR ECL DUAL 16QSOP	4
TSM917ESA+T Touchstone Semiconductor	IC COMP 1.8V W/REF 8SOIC	4955
TLC374MDG4 Texas Instruments	TLC374 QUAD GENERAL PURPOSE LINC	8200
TL714CDR Texas Instruments	IC DIFF COMPARATOR H-S 8-SOIC	2156
LMV761MA/NOPB Texas Instruments	IC COMP PREC PUSH-PULL OUT 8SOIC	328
LM2903DGKRG4 Texas Instruments	IC DUAL GP DIFF COMPARATR 8VSSOP	0
LM339FV-E2 ROHM Semiconductor	LM339FV IS QUAD-CHANNEL GROUND S	2388
LTC1540IS8#TRPBF Analog Devices, Inc.	IC COMP NANOPOWER W/REF 8-SOIC	4874
LM239APT STMicroelectronics	IC VOLT COMPARATOR QUAD 14-TSSOP	2074
AZV3002S-13 Zetex Semiconductors (Diodes Inc.)	IC COMP PUSH PULL 8SO	0
MAX9144EUD+T Maxim Integrated	IC COMPARATOR R-R 14TSSOP	2000
MAX9027EBT+T Maxim Integrated	IC COMPARATOR BTR 6-UCSP	3460
ADCMP393ARZ Analog Devices, Inc.	IC COMPARATOR QUAD RRO 14SOIC	1052
ADCMP606BKSZ-REEL7 Analog Devices, Inc.	IC COMP TTL/CMOS 1CHAN SC70-6	3286
LT1721IS#TRPBF Analog Devices, Inc.	IC COMP R-RINOUT QUAD 16SOIC	0
MAX40002ANS02+T Maxim Integrated	IC COMPARATOR VR OPEN DRAIN 4WLP	5000
LTC6752IMS8-2#PBF Analog Devices, Inc.	IC COMPARATOR 280MHZ 8MSOP	0
MAX9117EXK-T Analog Devices, Inc.	COMPARATOR WITH REFERENCE	67710
TLC3702IP Texas Instruments	TLC3702 DUAL, MICROPOWER, PUSH-P	7830
LMC7221BIMX	COMPARATOR, 1 FUNC, 18000UV OFFS	25000

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