Linear - Comparators

Part Number	Description / PDF	Quantity
TS3702IPT STMicroelectronics	IC COMPARATOR DUAL MCRPWR 8TSSOP	3733
TS882IYST STMicroelectronics	IC COMPARATOR R-R 1.1V 8MSOP	13
LM293ADT STMicroelectronics	IC COMP DUAL LP BIPO 8SOIC	0
LM2903HYPT STMicroelectronics	IC COMPAR DUAL LOW PWR 8TSSOP	1108
LM2903YST STMicroelectronics	IC VOLT COMPARATOR DUAL 8MSOP	0
TS884IPT STMicroelectronics	IC COMPARATOR RR 1.1V 14TSSOP	499
TS391IQ2T STMicroelectronics	IC VOLT COMPARATOR SGL 8DFN	3382
LM239APT STMicroelectronics	IC VOLT COMPARATOR QUAD 14-TSSOP	2074
LM2901DT STMicroelectronics	IC COMPARATOR LP QUAD 14-SOIC	12452
TSX3704IYPT STMicroelectronics	CONDITIONING & INTERFACES	1190
LM239DT STMicroelectronics	IC COMP QUAD LOW PWR 14SOIC	26257
TS393IDT STMicroelectronics	IC COMP MICROPWR DUAL V 8 SOIC	4505
TS3022IDT STMicroelectronics	IC COMPARATOR R-R 1.8V HS 8-SOIC	1903
TS339IPT STMicroelectronics	IC COMP MICROPWR QUAD V 14 TSSOP	5320
TS3021AILT STMicroelectronics	IC COMPARATOR R-R SOT23-5	2221
TS372IDT STMicroelectronics	IC COMP LP DUAL CMOS VOLT 8 SOIC	2381
TS862IDT STMicroelectronics	IC COMPARATOR R-R MCRPWR 8-SOIC	0
TS339CPT STMicroelectronics	IC COMP QUAD CMOS MCRPWR 14TSSOP	6280
LM339ADT STMicroelectronics	IC COMPARATOR LP QUAD 14-SOIC	0
LM2903PT STMicroelectronics	IC COMPARATOR DUAL LP 8-TSSOP	8559

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