Linear - Comparators

Part Number	Description / PDF	Quantity
ADCMP563BCPZ-WP Analog Devices, Inc.	COMPARATOR, 2 FUNC, 10000UV OFFS	17750
NCS2252SN2T1G Sanyo Semiconductor/ON Semiconductor	SINGLE OPEN DRAIN OUTPUT	0
TLC3704CD Texas Instruments	IC VOLT COMPARATOR QUAD 14-SOIC	284
ALD2301PAL Advanced Linear Devices, Inc.	IC COMP VOLT CMOS OD DUAL 8DIP	0
MAX9022AUA+T Maxim Integrated	IC COMPARATOR DUAL 8-UMAX	7500
TS372IN STMicroelectronics	IC COMP LP DUAL CMOS VOLT 8 DIP	0
MCP6544-I/ST Roving Networks / Microchip Technology	IC COMP PP I/O QUAD 1.6V 14TSSOP	437
MAX912CSE+ Maxim Integrated	IC COMPARATOR LP 16-SOIC	12963900
CMP02BICP Analog Devices, Inc.	LOW CURRENT PRECISION COMPARATOR	942
MAX921CSA Analog Devices, Inc.	DUAL-SUPPLY COMPARATOR	821
LM339PT STMicroelectronics	IC COMP QUAD CMOS MCRPWR 14TSSOP	9800
LM2901N/PB	COMPARATOR	12150
TLC352IPWG4 Texas Instruments	TLC352 DUAL, LOW VOLTAGE, LINCMO	194
LM393PSR Texas Instruments	IC DIFF COMPARATOR DUAL 8SO	1318
MAX902ESD+T Maxim Integrated	IC COMPARATOR VOLT 14-SOIC	0
KA339A Sanyo Semiconductor/ON Semiconductor	IC COMPARATOR QUAD 14-DIP	1396
TLV3202AID Texas Instruments	IC COMPARATR PWR RRI DL PP 8SOIC	1254
ADCMP582BCP-R2 Analog Devices, Inc.	COMPARATOR	11390
LM211QDRQ1 Texas Instruments	IC DIFF COMPARATOR W/STRB 8-SOIC	65
LM2903AVQDRG4Q1 Texas Instruments	IC COMPARATOR DIFF DUAL 8SOIC	0

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