Linear - Comparators

Part Number	Description / PDF	Quantity
ADCMP607BCPZ-R2 Analog Devices, Inc.	COMPARATOR, 1 FUNC, 5000UV OFFSE	5615
CMP402GS-REEL Analog Devices, Inc.	LOW VOLTAGE COMPARATOR	1500
AD8561ARUZ-REEL Analog Devices, Inc.	IC COMP 7NS ULTRA FAST 8TSSOP	0
AD8561ARZ-REEL7 Analog Devices, Inc.	IC COMP 7NS ULTRA-FAST 8-SOIC	1107
MAX982ESA Analog Devices, Inc.	SINGLE/DUAL-SUPPLY COMPARATOR	1987
LTC1445IS#TRPBF Analog Devices, Inc.	IC COMP W/REF LOWPWR QUAD 16SOIC	0
LTC1042CN8#PBF Analog Devices, Inc.	IC CMOS COMPARATOR WINDOW 8DIP	327
ADCMP361WYRJZ-RL7 Analog Devices, Inc.	IC COMPARATOR SINGLE OD SOT23-5	103
AD8561AN Analog Devices, Inc.	COMPARATOR	7694
PM139AY/883C Analog Devices, Inc.	QUAD COMPARATOR	1107
LTC6754HUD#PBF Analog Devices, Inc.	IC COMPARATOR R-R 12QFN	2198
LT1721CGN#PBF Analog Devices, Inc.	IC COMP R-RINOUT QUAD 16-SSOP	27
HMC675LP3ETR Analog Devices, Inc.	IC COMPARATOR RSCML 16QFN	0
ADCMP573BCPZ-R2 Analog Devices, Inc.	IC COMPARATOR PECL 3.3-5 16LFCSP	652
LT6700HVCS6-1#TRMPBF Analog Devices, Inc.	IC COMP DUAL 400MV REF TSOT23-6	0
LTC1540CMS8#PBF Analog Devices, Inc.	IC COMP NANOPOWER W/REF 8-MSOP	2320
MAX967ESA Analog Devices, Inc.	RAIL-TO-RAIL I/O COMPARATOR	8575
ADCMP604BKSZ-RL Analog Devices, Inc.	COMPARATOR	5086
LTC6752ISC6-4#TRMPBF Analog Devices, Inc.	IC COMP R-R CMOS 280MHZ SC70-6	1244
LT6700IDCB-2#TRMPBF Analog Devices, Inc.	IC COMP DUAL 400MV REF 6-DFN	990

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