CMOS 3D COMPASS

OVERVIEW
BLBC3-D MONOLITHIC CMOS 3D ELECTRONIC COMPASS FOR MOBILE APPLICATIONS

The BLBC3 is a monolithic CMOS 3-axis electronic compass and magnetometer leveraging Baolab's patented NanoEMS™ technology.

 
The chip contains integrated 3D self-calibrating magnetic sensors, analog and digital processing circuitry, A/D convertors and a configurable digital interface.
By arithmetically processing the values measured by the 3-axis sensors with an external processor, the magnetic heading can be obtained.
compass illustration
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Features

  • 3-Axis Lorentz-Force Magnetic Field Sensor3-Axis Lorentz-Force Magnetic Field Sensor
  • Automatic Sensitivity & Offset CalibrationAutomatic Sensitivity & Offset Calibration
  • Automatic Transition To Low-Power StateAutomatic Transition To Low-Power State
  • Integrated Master Clock GeneratorIntegrated Master Clock Generator
  • I2C or SPI Serial Digital InterfaceI2C or SPI Serial Digital Interface
  • Built-in Signal Conditioning, ADC & Digital InterfaceBuilt-in Signal Conditioning, ADC & Digital Interface
  • 2.4V - 3.6V Analog Supply Voltage2.4V - 3.6V Analog Supply Voltage
  • 1.8V (1.65V min) Digital Supply Voltag1.8V (1.65V min) Digital Supply Voltage
  • Android CompliantAndroid Compliant
  • Available in 3mm DFN & 2mm BGA PackagesAvailable in 3mm DFN & 2mm BGA Packages

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Applications

  • Electronic Compass In Mobile PhoneElectronic Compass In Mobile Phones
  • Heading & Dead Reckoning In Navigation DevicesHeading & Dead Reckoning In Navigation Devices
  • Map Orientation In Handheld DevicesMap Orientation In Handheld Devices
  • Location Based Services In Phones & CamerasLocation Based Services In Phones & Cameras
  • Motion-tracking For User Interface GesturesMotion-tracking for User Interface Gestures

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Package

The device is available in two package styles to suit production capability and is drop-in compatible with existing solutions.

Interface

The digital control bus is configurable as either SPI Slave or I2C (standard or fast mode). Data output is magnetic field strength for X, Y, and Z axes.
Baolab NanoEMS™ Compass 3mm DFN Package
Baolab NanoEMS™ Compass 2mm BGA Package

▲ Baolab NanoEMS™ Compass DFN Package

arrow   3mm x 3mm x 0.9mm DFN
arrow   10 lead, 0.5mm lead-pitch

tick   Lead (Pb)-free         tick   RoHS-compliant
▲ Baolab NanoEMS™ Compass BGA Package

arrow   2mm x 2mm x 0.75mm BGA
arrow   0.5mm grid-pitch

tick   Lead (Pb)-free         tick   RoHS-compliant

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MEMS ANALOGUE & DIGITAL ON A SINGLE CMOS CHIP

  • 3D
    Magnetic Sensor
  • Driver
  • MUX
  • Detector
  • Calibration Circuits
  • A / D
    Converter
  • Clock &
    Timing
    Generator
  • Control
    Logic
  • Power
    Supply &
    Reference
    Circuits
  • I2C & SPI
    Interface
MEMS
Analogue Electronics
Digital Electronics

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Hardware Specification

Parameter Min Max Unit
Heading Accuracy - 5 Degrees
Sensor Resolution - 0.3 µT
Sensor Range (each axis) -1.2 1.2 mT
Supply Voltage 2.4 3.6 V
Digital Interface Voltage 1.65 Supply Voltage V
Power Consumption for 10 measurements/sec
(40mG magnetic field strength, 3V supply voltage)		 - 2 mW
Standby Current - 1 uA

 

 
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