The MDA Low Power/Telemetry I/O card provides an extensive selection of interface to Spacecraft Platform devices & sensors for many applications ranging from Command & Data Handling, scientific instrumentation and payload controllers.

Low Power Telemetry I/O Card

• Analog Multiplexing Functions
  • 64 channels (4 X 16:1) analog multiplexer for thermistor temperature telemetry
  • 48 analog input channels (3 X 16:1) configured for a mix of single-ended or true bipolar differential inputs (up to 14 channels).
  • +/- 10 V range, +/-30V over-voltage tolerance, and high impedance with power off.
  • Each multiplexer provided with BITE voltage input on one channel.
  • Configurable scanning rate/sampling through control FPGA for different acquisition channels
• Thermistors Channels
  • Conditioning for up to 60 S311-P18 thermistors, types 3 to 10, includes:
    • Bandwidth limiting
    • Thermistor linearization & biasing (excited with +5.00 V reference)
    • Temperature accuracy of better than ±3ºC between -20ºC to +60ºC range
• Analog Telemetry Interfaces
  • Signal conditioning, low pass filters, gain & scaling, and biasing to interface to a variety of analog sensors: 4-wire RTD, pressure transducer (bridge with bias), current telemetry, etc;
  • 0-10V range, 13 bits resolution, and -10V to +10V with 14 bits resolution.
• Analog to Digital Converter (ADC)
  • 14-bit converter.
  • Bipolar input voltage range of ±3V full scale
  • Integral Track and Hold amplifier, and voltage reference
• Analog Command Output (D/A Converter)
  • 12 bit Digital to Analog converter
  • Output Buffer Amplifier with configurable gain/range setting.
• Bi-Level TLM Converter
  • 14 bi-level telemetry channels into two 16:1 analog MUX
  • High Common Mode Rejection, with true bipolar level inputs & hysteresis
• 16 Digital Telemetry channels (0-5V logic telemetry and micro-switch status sense)
  • Micro-switch inputs conditioning (noise and switch bounce filtering)
  • Each channel providing interrupt capability on signal transition.
• Bi-level controls & Pulse Commands Outputs
  • Qty 8 bi-level control outputs, Qty 4 pulse commands outputs with 12V/10mA drive capability.
  • Configurable Output pulse duration (50 to 150msec)
• Serial Data Channels/UART Ports
  • Six RS-422 receivers with dedicated FPGA inputs can be used as:
    • Serial digital data/telemetry (tachometers pulses, optical shaft encoders inputs, etc)
    • Serial digital telemetry (SD16 TTC-B-01), or Asynchronous (UART) receive ports,
  • Eight RS-422 drivers with dedicated FPGA outputs can be used as:
    • Serial digital Tele-commands (ML16 TTC-B-01), or UART transmit ports, with RS-422 physical interface.
• UART Port Characteristics
  • Two full duplex UART ports, with the following characteristics:
    • Independent Tx & Rx FIFO message buffers, soft or hardware handshake signals, programmable standard Baud rates from 9600 to 115 K Baud