Linear - Comparators

Part Number	Description / PDF	Quantity
LM2901S14-13 Zetex Semiconductors (Diodes Inc.)	IC COMPARATOR QUAD SO-14	12500
KA2901DMTF	COMPARATOR	6230
MAX902CSD+ Maxim Integrated	IC COMPARATOR DUAL HS LP 14-SOIC	805450
MAX9060EUK+T Maxim Integrated	IC COMP SINGLE LP SOT23-5	311910000
LM393PE4 Texas Instruments	IC DUAL DIFF COMPARATOR 8-DIP	8610000
MAX983CUA+T Maxim Integrated	IC COMPARATOR OD 8-UMAX	0
MAX965ESA Analog Devices, Inc.	RAIL-TO-RAIL I/O COMPARATOR	0
TLV3402CDGKR Texas Instruments	IC DUAL NANOPWR COMP 8VSSOP	1379
MAX972CPA Analog Devices, Inc.	SINGLE/DUAL-SUPPLY COMPARATOR	2824
MC3302DG Sanyo Semiconductor/ON Semiconductor	IC OPAMP QUAD SINGLE 14-SOIC	900
TLV7081YKAR Texas Instruments	NANOPOWER MICROPACKAGE LOW-VOLTA	1637
NJU77231F-TE1 New Japan Radio (NJR)	RAIL-TO-RAIL INPUT PUSH-PULL OUT	3895
LMV7275MGX/NOPB Texas Instruments	IC COMP SGL 1.8V R-R INPT SC70-5	13376
TLV3691IDCKR Texas Instruments	IC COMPARATOR NANO-POWER SC70-5	19039
LT1394CMS8#TRPBF Analog Devices, Inc.	IC COMPARATOR 7NS LOW PWR 8MSOP	0
ADCMP581BCPZ-R2 Analog Devices, Inc.	COMPARATOR	12722
LT6700IS6-3#TRPBF Analog Devices, Inc.	IC COMP DUAL 400MV REF TSOT23-6	3122
LM293PT STMicroelectronics	IC VOLT COMPARATOR DUAL 8-TSSOP	16143
LM239DG4 Texas Instruments	IC QUAD DIFF COMPARATOR 14-SOIC	0
TLV4011DCKR Texas Instruments	LOW-POWER COMPARATOR	28669000

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