Linear - Comparators

Part Number	Description / PDF	Quantity
LM393AP Texas Instruments	IC DUAL DIFF COMPARATOR 8-DIP	4625
MAX9042AEUA+T Maxim Integrated	IC COMPARATOR DUAL 8-UMAX	0
LM311DRE4 Texas Instruments	IC DIFF COMPARATOR STROBE 8-SOIC	0
NCS2200SN1T1G Sanyo Semiconductor/ON Semiconductor	IC COMPARATOR 1V LOW PWR 5TSOP	122815000
LT6703HVCS5-2#TRMPBF Analog Devices, Inc.	IC COMPARATOR 400MV REF TSOT23-5	1085
ADCMP371AKSZ-REEL7 Analog Devices, Inc.	IC COMPARATOR PUSH-PULL SC70-5	12526
LT1017IS8#TRPBF Analog Devices, Inc.	IC COMPARATOR MICRPWR DUAL 8SOIC	4572
JM38510/11202BPA Texas Instruments	LM193-MIL DUAL DIFFERENTIAL COMP	0
LM360H	SINGLE COMPARATOR	0
LT6700HVHS6-1#TRMPBF Analog Devices, Inc.	IC COMP DUAL 400MV REF TSOT23-6	1100
TLV3491AIDR Texas Instruments	IC COMPARATR P-P NANOPWR 8-SOIC	2500
MAX990ESA+T Maxim Integrated	IC COMPARATOR R-R 8-SOIC	7500
TLC372MDR Texas Instruments	IC DIFF COMP DUAL 8-SOIC	1324
LM293ADT STMicroelectronics	IC COMP DUAL LP BIPO 8SOIC	0
MAX9100EUK-T Analog Devices, Inc.	MAX9100 MICROPOWER COMPARATOR	0
TA75S393F,LF Toshiba Electronic Devices and Storage Corporation	IC COMPARATOR SINGLE SSOP5	707
BA2903FVM-TR ROHM Semiconductor	IC COMPARATOR DUAL 0.6MA 8MSOP	846
TPS3700QDSERQ1 Texas Instruments	TPS3710-Q1 WIDE VIN VOLTAGE DETE	1869
LMV7239QM7X/NOPB Texas Instruments	IC COMPARATOR RRI LP LV SC70-5	0
LM393DRG3 Texas Instruments	IC COMPARATOR DIFF DUAL 8SOIC	1372

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