Magnetic Sensors - Linear, Compass (ICs)

Image	Part Number	Description / PDF	Quantity	Rfq
	SS495A2-S Honeywell Sensing and Productivity Solutions	SENSOR HALL EFFECT ANALOG SMD	0
	HMC1043L-TR-RC Honeywell Aerospace	SENSOR MR WHEAT BRDG 16LPCC	0
	AA006-02 NVE Corporation	SENSOR MR WHEAT BRDG 8SOIC	0
	MLX90290LUA-AAA-622-BU Melexis	SENSOR HALL EFFECT ANALOG TO92-3	0
	A1321LUA-T Allegro MicroSystems	SENSOR HALL EFFECT ANALOG 3SIP	0
	A1323EUA-T Allegro MicroSystems	SENSOR HALL EFFECT ANALOG 3SIP	0
	A1301KLHLX-T Allegro MicroSystems	SENSOR HALL EFFECT ANALOG SOT23W	0
	A1323LLHLT Allegro MicroSystems	SENSOR HALL EFFECT ANALOG SOT23W	0
	AK8977A Asahi Kasei Microdevices / AKM Semiconductor	SENSOR ELECTRONIC COMPASS	0
	SS495A-L Honeywell Sensing and Productivity Solutions	SOLID STATE SENSOR	0
	MMC3280MS MEMSIC	MAGNETIC SENSOR 3-AXIS	0
	MMC3280MS-R MEMSIC	MAGNETIC SENSOR 3-AXIS	0
	TLE5027CE6747HAMA3 IR (Infineon Technologies)	SENSOR MAGNETORESISTIVE PWM 3SIP	0
	MMC33162MT MEMSIC	MAGNETIC SENSOR 3-AXIS	0
	AK8976A Asahi Kasei Microdevices / AKM Semiconductor	SENSOR ELECTRONIC COMPASS	0
	MMC3140MS MEMSIC	MAGNETIC SENSOR 3-AXIS	0
	AK8977 Asahi Kasei Microdevices / AKM Semiconductor	SENSOR ELECTRONIC COMPASS	0
	SS495A2-L Honeywell Sensing and Productivity Solutions	SOLID STATE SENSOR	0
	MW020 Asahi Kasei Microdevices / AKM Semiconductor	MAGNETORESISTIVE ELEMENT	0
	SS496A1-SP Honeywell Sensing and Productivity Solutions	SOLID STATE SENSOR	0

Magnetic Sensors - Linear, Compass (ICs)

1. Overview

Magnetic sensors - linear compass ICs are semiconductor devices that detect magnetic fields and convert them into electrical signals. These integrated circuits provide precise measurement of magnetic field direction and strength in linear axes, enabling 2D/3D orientation detection. Their importance spans multiple industries due to their ability to provide contactless position sensing, navigation capabilities, and magnetic field monitoring in compact form factors.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Hall Effect Sensors	Voltage output proportional to magnetic field strength, simple design	Current sensing, proximity detection
Anisotropic Magnetoresistance (AMR) Sensors	High sensitivity (0.1 accuracy), low power consumption	Electronic compasses, navigation systems
Giant Magnetoresistance (GMR) Sensors	Ultra-high sensitivity (nanotesla range), wide bandwidth	Biomedical devices, industrial position control
Tunneling Magnetoresistance (TMR) Sensors	Lowest power consumption, excellent thermal stability	IoT devices, automotive safety systems

3. Structure & Composition

Typical construction includes: - Sensing element (Hall plate/AMR film/TMR junction) - Signal conditioning circuitry (amplifiers, ADCs) - Temperature compensation modules - Digital interface (I2C/SPI) Packaged in LGA/QFN formats (2-8mm sizes) with magnetic shielding layers. Advanced versions integrate sensor fusion algorithms for 3-axis measurement.

4. Key Technical Specifications

Parameter	Description & Importance
Sensitivity (mV/Gauss)	Determines minimum detectable field strength
Resolution ( T/LSB)	Affects angle measurement precision (critical for navigation)
Operating Temperature (-40 to +125 C)	Defines environmental suitability
Power Consumption ( A/mA)	Crucial for battery-powered devices
Interface Type	I2C/SPI for digital output, analog for raw signals

5. Application Fields

Main industries include: - Consumer Electronics: Smartphone compasses, AR/VR headsets - Automotive: EPS systems, vehicle detection - Industrial: Robotics, CNC machine tool positioning - Aerospace: Drone stabilization systems - Medical: Surgical tool tracking

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Specifications
STMicroelectronics	LIS3MDL	50 Gauss range, 0.08 T/LSB, I2C/SPI
Honeywell	HMC5883L	80 Hz bandwidth, 2-4 Gauss accuracy
NXP Semiconductors	MFX7755	3D sensing, 0.1 heading accuracy
TDK-InvenSense	ICM-20948	9-axis MEMS+mag, 0.15 mA operating current

7. Selection Guidelines

Key consideration factors: - Required measurement axis (2D vs 3D) - Environmental conditions (temperature, vibration) - Power budget constraints - Required accuracy vs cost trade-offs - Interface compatibility with host system - Calibration requirements (hard/soft iron compensation)

8. Industry Trends

Current development directions: - Integration with MEMS IMUs for sensor fusion - AI-based self-calibration algorithms - Sub-10 A ultra-low power consumption - Increased radiation hardness for space applications - Development of 4D magnetic field-time sensors