Linear - Comparators

Part Number	Description / PDF	Quantity
TLV7021DCKT Texas Instruments	SMALL SIZE, MICRO POWER, LOW VOL	1153
LM339APWR Texas Instruments	IC QUAD DIFF COMPARATOR 14-TSSOP	10062
TLC3702IPG4 Texas Instruments	IC MICROPWR COMP DUAL 8-DIP	0
LMC7211AIM Texas Instruments	COMPARATOR, 1 FUNC, 8000UV OFFSE	31202
LM293ADR Texas Instruments	IC DUAL GP DIFF COMPARATR 8SOIC	0
LM339NSR Texas Instruments	IC QUAD DIFF COMPARATOR 14SO	3692
LP2901IDRG4Q1 Texas Instruments	LP2901-Q1 AUTOMOTIVE CATALOG QUA	77445
TLC3704IDR Texas Instruments	IC MICROPWR COMP QUAD 14-SOIC	2683
TLV3012AIDBVT Texas Instruments	IC COMPARATOR 1.8V W/REF SOT23-6	2264
TLC3702QDRQ1 Texas Instruments	TLC3702-Q1 AUTOMOTIVE CATALOG DU	4609
LM393DE4 Texas Instruments	IC DUAL DIFF COMPARATOR 8-SOIC	34799975
LM360M/NOPB Texas Instruments	IC COMPARATOR HS DIFF 8-SOIC	333
LMV393IDGKR Texas Instruments	IC DUAL GP LV COMPARATOR 8VSSOP	4742
LM2901VQPWRG4 Texas Instruments	LM2901V QUAD DIFFERENTIAL COMPAR	15560
LM293DRE4 Texas Instruments	IC COMPARATOR DIFF DUAL 8SOIC	0
LM2903AVQDR Texas Instruments	IC DUAL GP DIFF COMPARATR 8SOIC	2
TLV7031DCKR Texas Instruments	VOLTAGE COMPARATOR	0
LM239PW Texas Instruments	IC QUAD DIFF COMPARATOR 14-TSSOP	2466
TLV3011AIDBVR Texas Instruments	IC COMPARATR 1.8V W/REF SOT23-6	922
LMC7215QIM5X/NOPB Texas Instruments	LMC7215-Q1 AUTOMOTIVE U-POWER, R	33000

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