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MAG-POS

Resolver/LVDT interface IC

Description
The MAG-POS is a radiation tolerant resolver and LVDT to digital converter. The MAG-POS is designed to read out the angular information from a resolver or the linear distortion information from an LVDT. The MAG-POS is capable of reading the position of a resolver or LVDT in a 16-bit resolution at the speed of 40k samples/s.
Gain and offset trimming is available to calibrate the system for a specific resolver or LVDT to achieve maximum performance. Sine and cosine reference signals can be foreseen.
A serial interface is provided to configure internal register settings and read the fault status (LOS and DOS). Sensor data is obtained through the SPI interface.

Radiation hardness

  • TID tolerance: >1 MGy
  • SEL: >100 MeV·cm²/mg
  • SET/SEU: >60 MeV·cm²/mg

Key technical specifications

  • Temperature range: -50 to 125 °C
  • Input voltage range: 1.2 Vpp
  • Resolution: 16 bits
  • Diagnostic features
    – Loss of tracking (LOS)
    – Degradation of signal (DOS)
  • Phase lock range: -45 to 45 °
  • Accuracy: 9 Arcmin
  • Tracking rate: 9000 rpm
  • Sampling rate: 40k sample/s
  • Settling time: 30ms

Applications

  • DC and AC servo motor control
  • Electric power steering
  • Electric vehicles
  • Automated motion sensing and control
  • Remote handling
  • Spacecraft / satellite attitude control
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