'Compass' related articles 3

  1. 2009/04/30 HMC5843 - 3-Axis Digital Compass IC
  2. 2008/04/24 HM55B - Compass Module
  3. 2008/03/03 HMC6343 - 3-Axis Digital Compass Module
DESCRIPTION
The Honeywell HMC5843 is a surface mount multi-chip module designed for low field magnetic sensing with a digital interface for applications such as low cost compassing and magnetometry. The HMC5843 includes our state of the art 1043 series magneto-resistive sensors plus Honeywell developed ASIC containing amplification, strap drivers, offset cancellation, 12-bit ADC and an I2C serial bus interface. The HMC5843 is in a 4.0 by 4.0 by 1.3mm surface mount leadless chip carrier (LCC). Applications for the HMC5843 include Consumer Electronics, Auto Navigation Systems, Personal Navigation Devices, and Magnetometers.
The HMC5843 utilizes Honeywell’s Anisotropic Magnetoresistive (AMR) technology that provides advantages over other magnetic sensor technologies. The sensors feature precision in-axis sensitivity and linearity, solid-state construction with very low cross-axis sensitivity designed to measure both direction and magnitude of Earth’s magnetic fields, from tens of micro-gauss to 6 gauss. Honeywell’s Magnetic Sensors are among the most sensitive and reliable low-field sensors in the industry.
Honeywell continues to maintain product excellence and performance by introducing innovative solid-state magnetic sensor solutions. These are highly reliable, top performance products that are delivered when promised. Honeywell’s magnetic sensor solutions provide real solutions you can count on.

FEATURES
*3-Axis Magnetoresistive Sensors and ASIC in a Single Package
*Low Cost
*4.0 x 4.0 x 1.3mm Low Height Profile LCC Surface Mount Package
*Low Voltage Operations (2.5 to 3.3V)
*Built-In Strap Drive Circuits
*I2C Digital Interface
*Lead Free Package Construction
*Wide Magnetic Field Range (+/-6 Oe)
*Available in Tape & Reel Packaging

HMC5843, HMC5843-TR, HMC5843-demo, HMC5843-eval

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HM55B - Compass Module

ETC 2008/04/24 13:35
General Description
 The Hitachi HM55B Compass Module is a dual-axis magnetic field sensor that can add a sense of direction to your next electronic or robotic project.
The sensing device on the Compass Module is a Hitachi HM55B chip.
An onboard regulator and resistor protection make the 3 volt HM55B chip compatible with 5 volt
BASIC Stamp® microcontroller supply and signal levels.
The Compass Module also makes all the power and signal connections on the tiny surface mount HM55B chip accessible in a breadboard-friendly 0.3 inch wide 6-pin DIP package. Acquiring measurements from the module is made easy with the BASIC Stamp 2 microcontroller's SHIFTIN and SHIFTOUT commands, which are designed for synchronous serial communication with chips like the HM55B.

Features
• Sensitive to microtesla (μT) variations in magnetic field strength
• Simplifies direction by resolving magnetic field measurements into two component axes
• Good for 6-bit (64-direction) resolution measurements after software calibration
• Only 30 to 40 ms between start measurement and data-ready
• Built-in resistor protection for data pins eliminates bus conflict risks
• Compact and breadboard-friendly 0.3 inch, 6-pin DIP package
• Compatible with all BASIC Stamp, Javelin Stamp and SX microcontrollers
• Makes communication and direction calculations especially easy with the PBASIC commands
SHIFTOUT, SHIFTIN, and ATN for the BASIC Stamp 2 series of microcontrollers

Application
• Mobile robot direction sensor
• Handheld electronic compass
• Weathervane indicator for remote weather stations
• Audible compass for the vision impaired
• Automotive electronic compass

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The Honeywell HMC634 3 is a fully integrated compass module that combines 3-axis magneto-resistive sensors and 3-axis MEMS accelerometers with the required analog and digital support circuits, and algorithms for heading computation. By combining the sensor elements, processing electronics, and firmware in to a 9.0mm by 9.0mm by 1.9mm LCC package, Honeywell offers a complete, ready to use tiltcompensated electronic compass. This provides design engineers with the simplest solution to integrate high volume, cost effective compasses into wireless phones, consumer electronics, vehicle compassing, and antenna positioning.

The HMC634 3 utilizes Honeywell’s Anisotropic Magnetoresistive (AMR) technology that provides advantages over other magnetic sensor technologies. The sensors feature precision sensitivity and linearity, solid-state construction with very low cross-axis sensitivity designed to measure both direction and magnitude of Earth’s magnetic fields. Honeywell’s Magnetic Sensors are among the most sensitive and reliable low-field sensors in the industry.
Honeywell continues to maintain product excellence and performance by introducing innovative solid-state magnetic sensor solutions. These are highly reliable, top performance products that are delivered when promised. Honeywell’s magnetic sensor solutions provide real solutions you can count on.

FEATURES
* Compass with Heading Output
* 3-Axis MR Sensors and Accelerometers plus Electronics in a Single Package
* 9 x 9 x 1.9mm LCC Surface Mount Package
* Low Voltage Operations (2.7 to 3.6V)
* Digital Serial Data Interface
* Moderate Precision Outputs
* Lead Free Package Construction

BENEFITS
* A Complete Compass. Everything is Done.
* A Complete Digital Solution with Heading/Tilt Outputs and Hard Iron Calibration. Serial Data Interface for Heading Output.
* Small Size, Easy to Assemble and Compatible with High Speed SMT Assembly
* Compatible for Battery Powered Applications
* I2C Interface, Easy to Use 2-Wire Communication
* +/-2° Heading Accuracy with +/-1° Pitch and Roll Accuracy
* Complies with RoHS Environmental Standards

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