Linear - Comparators

Part Number	Description / PDF	Quantity
TLC352IDRG4 Texas Instruments	IC DIFF VOLT COMP DUAL 8-SOIC	0
TLV3201AIDBVR Texas Instruments	IC COMPARATOR RRI SGL SOT23-5	21204
TLV7042DGKR Texas Instruments	IC POWER MANAGEMENT SUPERVISORY	5000
LM2901DRE4 Texas Instruments	IC DIFF COMPARATOR QUAD 14-SOIC	0
LM2903AVQPWR Texas Instruments	IC DUAL GP DIFF COMPARATR 8TSSOP	0
TL331QDBVRQ1 Texas Instruments	IC COMPARATOR DIFF SGL SOT23-5	12
LM211DG4 Texas Instruments	LM211 DIFFERENTIAL COMPARATOR WI	2200
LMV7239M5X/NOPB Texas Instruments	IC COMP ULP R-R INPUT SOT23-5	2170
LM139ADRG4 Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	188410000
LMC7211BIM5X Texas Instruments	COMPARATOR, 1 FUNC, 18000UV OFFS	8425
TL331KDBVT Texas Instruments	IC DIFF COMPARATOR SNGL SOT23-5	2744
LM2903MX-TI Texas Instruments	IC COMPARATOR DUAL VOLT 8-SOIC	28724
TLV3402CDRG4 Texas Instruments	IC DUAL NANOPWR COMP 8-SOIC	0
LMC7211AIM5X Texas Instruments	COMPARATOR, 1 FUNC, 8000UV OFFSE	20100
TLV2393ID Texas Instruments	COMPARATOR, 2 FUNC, 9000UV OFFSE	6757
TLC3704ID Texas Instruments	IC COMP QUAD MICROPOWER 14SOIC	1813
LM393DR Texas Instruments	IC DUAL DIFF COMP 8-SOIC	8580
TPS3700QDDCRQ1 Texas Instruments	IC COMP WINDOW DUAL 6SOT	0
LM239DRG4 Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	4286
LM393TL/NOPB Texas Instruments	IC COMPARATOR DUAL 8USMD	553

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