Linear - Comparators

Part Number	Description / PDF	Quantity
BA2903SF-E2 ROHM Semiconductor	IC COMPARATOR DUAL 36V 8SOP	363
BU7250SG-TR ROHM Semiconductor	IC COMPARATOR OPEN DRAIN 5SSOP	2940
BA2903F-E2 ROHM Semiconductor	IC COMPARATOR DUAL 0.6MA SOP8	728
LM2903FVJ-E2 ROHM Semiconductor	LM2903FVJ IS TWO-CHANNEL GROUND	2500
BA2903SFV-E2 ROHM Semiconductor	IC COMPARATOR DUAL 36V SSOP-B8	1100
BU7230SG-TR ROHM Semiconductor	IC COMPARATOR LP OD 5SSOP	2350
BU5255HFV-TR ROHM Semiconductor	IC COMPARATOR P-P HVSOF5	1814
BA2901YFV-CE2 ROHM Semiconductor	STANDARD OPEN-COLLECTOR COMPARAT	2355
LM2903DGKR ROHM Semiconductor	IC COMPARATOR DUAL GP 8MSOP	770
BA2903SFVM-TR ROHM Semiconductor	IC COMPARATOR DUAL 36V 8MSOP	722
BA2903WF-E2 ROHM Semiconductor	IC COMPARATOR OPEN SOP8	246
BA2903FV-E2 ROHM Semiconductor	IC COMPARATOR DUAL 0.6MA SSOPB8	276
BU7253F-E2 ROHM Semiconductor	IC COMPARATOR OPEN DRAIN 8SOP	1175
BA2903YFV-CE2 ROHM Semiconductor	STANDARD OPEN-COLLECTOR COMPARAT	2425
BA2901YFV-MGE2 ROHM Semiconductor	AUTOMOTIVE GROUND SENSE COMPARAT	2484
BA10393F-E2 ROHM Semiconductor	IC COMPARATOR 2-CHANNEL SOP8	3667
LM339F-E2 ROHM Semiconductor	IC COMP 4CH GRND SENSE SOP14	2211
BU7252SFVM-TR ROHM Semiconductor	IC COMPARATOR DUAL 5.5V 8MSOP	0
BU7232SF-E2 ROHM Semiconductor	IC COMPARATOR DUAL 5.5V SOP-8	0
BU7231SG-TR ROHM Semiconductor	IC COMPARATOR SGL 5.5V SSOP-5	5430

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