AKM AK09940A

AK09940A is ultrahigh precision 3- axis electronic magnetometer IC with ultrahigh sensitive TMR sensor technology. Small package of AK09940A incorporates magnetic sensors for detecting magnetic field in the X- axis, Y- axis, and Z- axis, a sensor driving circuit, signal amplifier chain, and an arithmetic circuit for processing the signal from each sensor. Self- test function is also incorporated.

• Upward compatible with AK09940 3- axis magnetometer device
• Built- in A to D Converter for magnetometer data out
• 18- bit data out for each 3- axis magnetic component
• Sensitivity: 10 nT/LSB (typ.)
• Range: ±1200 μT (max.)
• Serial interface
  • I2C bus interface Standard and Fast modes compliant with Philips 120 specification Ver.2.1
  • 4- wire SPI
• Operation mode
  • Power- down, Single measurement, Continuous measurement, External trigger measurement and Self- test
• DRDY function for measurement data ready
• Magnetic sensor overflow monitor function
• Built- in oscillator for internal clock source
• Power on Reset circuit
• Self- test function with internal magnetic source
• Built- in temperature sensor
• Built- in magnetic sensitivity adjustment circuit
• 8 FIFO data buffer
• Selectable sensor drive
  • Low power drive / Low noise drive / Ultra low power drive
• Operating temperatures: -30°C to +85°C
• Operating supply voltage:
  • Analog power supply +1.7V to +1.98V
  • Digital Interface supply +1.65V to +3.6V
• Current consumption:
  • Power- down: 1.0 μA (typ.)
  • Measurement:
    • Average current consumption at 100 Hz repetition rate
      • Ultra low power drive: 16 μA (typ.)
      • Low power drive 1: 30 μA (typ.)
      • Low power drive 2: 60 μA (typ.)
      • Low noise drive 1: 100 μA (typ.)
      • Low noise drive 2: 200 μA (typ.)