Linear - Comparators

Part Number	Description / PDF	Quantity
LM211QDG4 Texas Instruments	LM211 DIFFERENTIAL COMPARATOR WI	14640
TLC372CPSG4 Texas Instruments	IC DIFF COMPARATOR DUAL 8SO	0
LM339PWRG3 Texas Instruments	IC COMPARATOR DIFF QUAD 14TSSOP	0
LMV331IDCKTG4 Texas Instruments	IC GP LV COMPARATOR SC70-5	0
LM2901QDRG4Q1 Texas Instruments	LM2901-Q1 AUTOMOTIVE CATALOG QUA	15161
LM339ADBR Texas Instruments	IC QUAD DIFF COMPARATOR 14-SSOP	1384
LMC6772AIM Texas Instruments	IC COMP DUAL MICRPWR CMOS 8-SOIC	377
TLC339MDG4 Texas Instruments	TLC339 QUAD, MICROPOWER, LINCMOS	7450
LM2903AVQDRQ1 Texas Instruments	IC DUAL DIFF COMPARATOR 8-SOIC	0
LM2903N/NOPB Texas Instruments	IC COMPARATOR DUAL VOLT 8-DIP	373410000
LM393ADRE4 Texas Instruments	IC DUAL DIFF COMPARATOR 8-SOIC	0
LM293ADGKR Texas Instruments	IC DIFF COMPARATOR DUAL 8VSSOP	2
LM211DRG4 Texas Instruments	IC DIFF COMPARATOR W/STRB 8SOIC	3380
TLV3494AIPWT Texas Instruments	IC COMPARTOR P-P NANOPWR 14TSSOP	382
LMV339IDR Texas Instruments	IC QUAD LV COMPARATOR 14-SOIC	20991
LMV7239M7/NOPB Texas Instruments	IC COMPARATOR R-R INPUT SC-70-5	88835000
LP211DR Texas Instruments	IC DIFF COMPARATOR 8-SOIC	2328
TLC3702MJG Texas Instruments	TLC3702M LOW-POWER LINCMOS DUAL	23
TLV2352ID Texas Instruments	IC DIFF COMPARATOR DUAL 8-SOIC	1541
LMC6762BIMX/NOPB Texas Instruments	IC COMP DUAL MICRPWR CMOS 8-SOIC	9165

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