Linear - Comparators

Part Number	Description / PDF	Quantity
AD8468WBKSZ-R7 Analog Devices, Inc.	IC COMPARATOR TTL/CMOS SC70-6	1657
NCV2903DMR2G Sanyo Semiconductor/ON Semiconductor	IC COMP DUAL OFFSET LV 8MICRO	2063
TLC393IDR Texas Instruments	IC DUAL V COMP 8-SOIC	7594
MAX9020EKA+T Maxim Integrated	IC COMPARATOR DUAL SOT23-8	1414
LMC6762AIMX Texas Instruments	COMPARATOR, 2 FUNC, 5000UV OFFSE	2500
MCP6541T-I/LT Roving Networks / Microchip Technology	IC COMP PUSHPLL 1.6V SNGL SC70-5	2218
TLV7211AIDCKR Texas Instruments	IC COMP R-R IN/P-P OUT SC70-6	3919
LT6700CS6-2#TRMPBF Analog Devices, Inc.	IC COMP DUAL 400MV REF TSOT23-6	10565
TS861AIDT STMicroelectronics	IC COMPARATOR R-R MCRPWR 8-SOIC	0
MAX972CSA+ Maxim Integrated	IC COMPARATOR OD 8-SOIC	43
MAX9108ESD+ Maxim Integrated	IC COMPAR LP QUAD 14-SOIC	47311400
TS331IQT STMicroelectronics	IC COMPARATOR SINGLE DFN6	55
TS374IN STMicroelectronics	IC COMP LP QUAD CMOS VOLT 14 DIP	0
LMV393IDR Texas Instruments	IC DUAL GP LV COMPARATOR 8-SOIC	0
LM2903AVQDRG4 Texas Instruments	IC COMPARATOR DIFF DUAL 8SOIC	1009
LMV7235M5 Texas Instruments	IC COMPARATOR R-R INPUT SOT23-5	133110000
LMV762MAX/NOPB Texas Instruments	IC COMP PREC W/P-POP LV 8-SOIC	0
LM2901VN	COMPARATOR	2365
LM361MX/NOPB Texas Instruments	IC COMPARATOR HS DIFF 14-SOIC	3504
AD8465WBCPZ-R7 Analog Devices, Inc.	IC COMPARATOR LVDS R-R 12LFCSP	923

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