Linear - Comparators

Part Number	Description / PDF	Quantity
LMC6772AIMX-NS	COMPARATOR, 2 FUNC, 8000UV OFFSE	10000
LM393AWDT STMicroelectronics	LOW POWER DUAL VOLTAGE COMPARATO	0
MCP6547T-E/MS Roving Networks / Microchip Technology	IC COMP 1.6V DUAL O-D 8MSOP	2517
LM2903MX-ON	IC COMPARATOR DUAL VOLT 8-SOIC	3000
ADCMP607BCPZ-WP Analog Devices, Inc.	IC COMP TTL/CMOS 1CHAN 12-LFCSP	81
TLC374MD Texas Instruments	TLC374 QUAD GENERAL PURPOSE LINC	5050
LM293ST STMicroelectronics	IC COMP DUAL LP BIPO MINI 8SOIC	3252
5962-7700801VCA Texas Instruments	LM139-SP QUAD DIFFERENTIAL COMPA	18
MAX967EUA+T Maxim Integrated	IC COMPARATOR R-R 8-UMAX	0
MAX989EUA+ Maxim Integrated	IC COMPARATOR R-R 8-UMAX	7081000
LM311H	IC VOLTAGE COMPARATOR TO-99-8	9382
MAX922CSA+T Maxim Integrated	IC COMPARATOR DUAL LOWPWR 8-SOIC	2500
LM2903AQTH-13 Zetex Semiconductors (Diodes Inc.)	IC COMPARATOR DUAL DIFF TSSOP-8	5000
TLV7211IDCKT Texas Instruments	IC SNGL CMOS COMP R-R/P-P SC70-6	212
TLV3502AIDCNT Texas Instruments	IC COMPARATOR R-R HI-SPD SOT23-8	4481
TL331KDBVRG4 Texas Instruments	IC DIFF COMPARATOR SNGL SOT23-5	0
TLV7211AIDR Texas Instruments	TLV7211A PRECISION SINGLE HIGH V	11152
LM311PSRE4 Texas Instruments	IC DIFF COMPARATOR STROBE 8SO	0
TLV3701ID Texas Instruments	IC COMP P-P NANOPWR 8-SOIC	3589975
MAX40000AUT12+T Maxim Integrated	1UA COMPARATOR WITH PRECISION RE	1990

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