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MAG-SEI

Sensor interface IC

Description

MAG-SEI is a generic signal conditioning circuit for reading out sensors such as RTD, thermocouples, strain gauges, etc. The MAG-SEI device provides an interface for resistive bridge sensor elements, such as RTD, thermocouple, piezo resistive, and strain-gauge pressure-sense elements. The device is a full system-on-chip (SoC) solution that incorporates a programmable gain amplifier, ADC, and digital signal processing. MAG-SEI also includes integrated voltage regulators, an on-chip temperature sensor, digital signal processing, an SPI interface, and an oscillator, thus minimizing the number of external components.

Radiation hardness

  • TID tolerance: >1 MGy
  • SET/SEU: >60 MeV∙cm²/mg

Key technical specifications

  • Differential input channels: 2
  • Gain settings: 1 ~ 256
  • ADC resolution: 16 bits
  • 98 dB
  • Sample rate: 5 kHz
  • Supply: 1.2 V
  • Power consumption: 10 mW
  • Temperature range: -50 ~ 125 °C
  • Bandwidth: 2kHz
  • gain offset = 2 %
  • gain error = +/-0.5
  • gain drift: 10 ppm/°C
  • Offset drift: 10 nV/°C

Applications

  • Condition monitoring
  • Health monitoring and housekeeping
  • Sensor networks
  • Temperature sensor readout
  • Strain-gauge readout
  • Pressure sensor readout
  • Post-nuclear accident monitoring
  • Remote terminal units
  • Power distribution units

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