Linear - Comparators

Part Number	Description / PDF	Quantity
LMP7300MM/NOPB Texas Instruments	IC AMP PREC COMP W/REF 8VSSOP	791
LMC6762AIM Texas Instruments	IC COMP DUAL MICRPWR CMOS 8-SOIC	285
LM2903BIDR Texas Instruments	36V JI.3 DUAL COMPARATOR	2069
LM339DRE4 Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	0
TLV2354MFKB Texas Instruments	TLV2354M LINCMOS QUAD LOW-VOLTAG	4
LM360M Texas Instruments	IC COMPARATOR HS DIFF 8-SOIC	0
TLV3404IPWR Texas Instruments	IC COMP CMOS OPEN DRAIN 14TSSOP	8041
LM2903QD Texas Instruments	IC DUAL DIFF COMPARATOR 8-SOIC	1969
LM339ADRE4 Texas Instruments	LM339A PRECISION QUAD DIFFERENTI	2500
LM311N/NOPB Texas Instruments	IC VOLTAGE COMPARATOR 8-DIP	2242
LP339MX Texas Instruments	LP339-N ULTRA-LOW POWER QUAD COM	18899
LM311MX Texas Instruments	IC VOLTAGE COMPARATOR 8-SOIC	2149
LMV7271MF Texas Instruments	COMPARATOR, 1 FUNC, 4000UV OFFSE	62081
LM360MX Texas Instruments	IC COMPARATOR HS DIFF 8-SOIC	0
TLV3401IDBVRG4 Texas Instruments	IC COMPARATOR SGL OD OUT SOT23-5	0
LMV761MFX Texas Instruments	IC COMP PREC W/P-POP LV SOT23-6	0
TLV3404IPWRG4 Texas Instruments	IC QUAD NANOPWR COMP 14-TSSOP	0
TLC339IDRG4 Texas Instruments	IC MICROPWR COMP QUAD 14-SOIC	0
TLV3401IDR Texas Instruments	TLV3401 SINGLE NANO POWER HIGH-V	51277
LMP7300MME/NOPB Texas Instruments	IC AMP PREC COMP W/REF 8VSSOP	819

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