Linear - Comparators

Part Number	Description / PDF	Quantity
TSX393IQ2T STMicroelectronics	IC COMP MICROPWR 16V DUAL 8DFN	0
LM2903WYPT STMicroelectronics	IC VOLT COMPARATOR DUAL 8TSSOP	0
TS883IST STMicroelectronics	RAIL-TO-RAIL 0.9V NANOPOWER, OPE	2727
TS884IQ4T STMicroelectronics	IC COMPARATOR R-R 1.1V 16QFN	48
LM311DT STMicroelectronics	IC VOLTAGE COMPARATOR 8-SOIC	1642
TS862IPT STMicroelectronics	IC COMPARATOR R-R MCRPWR 8-TSSOP	3440
TS881ILT STMicroelectronics	IC COMPARATOR R-R 1.1V SOT-23-5	1820
TS331ICT STMicroelectronics	IC COMPARATOR SINGLE SC70-5	844
LM339APT STMicroelectronics	IC COMP QUAD LOW PWR 14TSSOP	4026
TS861AILT STMicroelectronics	IC COMP SGL RAIL TO RAIL SOT23-5	5561
TS861IDT STMicroelectronics	IC COMP BICMOS R-R MCRPWR 8SOIC	0
TS883IQ2T STMicroelectronics	CONDITIONING & INTERFACES	2639
TS374CDT STMicroelectronics	IC COMP QUAD LOW PWR 14SOIC	0
LM219DT STMicroelectronics	IC COMPARATOR HS DUAL 14-SOIC	8686
LM2901PT STMicroelectronics	IC COMP QUAD LOW PWR 14TSSOP	84
TS3011ICT STMicroelectronics	IC COMPARATOR SGL R-R SC70-5	11300
TS862AIPT STMicroelectronics	IC COMPARATOR R-R MCRPWR 8-TSSOP	0
TSX3704IPT STMicroelectronics	MICROPOWER (5UA) 16V QUAD CMOS C	2483
TS3022IST STMicroelectronics	IC COMP R-R 1.8V HS 8-MSOP	0
TS3021IYLT STMicroelectronics	IC COMPARATOR R-R 1.8V SOT23-5	2661

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