Linear - Comparators

Part Number	Description / PDF	Quantity
LM2903WHYST STMicroelectronics	IC VOLT COMPARATOR DUAL MINI-SO8	47
TS3021ILT STMicroelectronics	IC COMPARATOR R-R 1.8V SOT23-5	7427
TS882IQ2T STMicroelectronics	IC COMPARATOR RR 1.1V DFN8	4261
TSX393IYDT STMicroelectronics	IC COMPARATOR DUAL CMOS SO8	2232
TS331ILT STMicroelectronics	IC COMPARATOR SINGLE SOT23-5	24771
TS880ICT STMicroelectronics	RAIL-TO-RAIL 0.9V NANOPOWER OPEN	2768
TS391RILT STMicroelectronics	IC COMPARATOR SGL LP SOT-23-5	5331
TS3022IYST STMicroelectronics	RAIL-TO-RAIL 1.8V HIGH-SPEED MIC	987
TS3702IDT STMicroelectronics	IC COMP MICROPWR DUAL V 8 SOIC	0
TS334IDT STMicroelectronics	IC COMPARATOR R-R QUAD 14-SOIC	2552
TSX3702IPT STMicroelectronics	IC COMPARATOR 16V DUAL 8TSSOP	0
LM2901YDT STMicroelectronics	IC VOLT COMPARATOR QUAD 14-SOIC	1834
TS332IQ2T STMicroelectronics	IC COMPARATOR R-R DUAL 8DFN	17710
TS7221AI1LT STMicroelectronics	IC COMPARATOR R-R BICMOS SOT23-5	0
LM2903WYDT STMicroelectronics	IC VOLT COMPARATOR DUAL 8-SOIC	0
TSX339IYPT STMicroelectronics	AMPLIFIERS AND COMPARATORS	2456
TSX393IPT STMicroelectronics	IC COMPARATOR 16V DUAL 8TSSOP	0
TSX3704IQ4T STMicroelectronics	IC COMPARATOR QUAD CMOS 16VFQFPN	211
TSX3702IYDT STMicroelectronics	IC COMPARATOR DUAL CMOS SO8	2470
TS3704IDT STMicroelectronics	IC COMP MICROPWR QUAD V 14 SOIC	2574

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