Hardware

Design and specs

  1. FPGA: Lattice iCE40HX4K - TQFP 144 Package
  2. Memory:
    • 8 Mbit SRAM, 10ns, 512 k x 16, equivalent:
      • 65 full lines of 120us at 64Msps
      • 840 lines of 120us at 10Msps, 8 bits
    • 8 Mb SPI Flash for FPGA configuration
  3. Ultrasound processing:
    • VGA: AD8331 controled by DAC
    • Pulser: MD1210 + TC6320
    • ADC: 65Msps ADC10065
      • 10 bits of data / sample
      • 2 bits of line counters
      • 4 bits of IOs (counters, ...)
  4. Parameters: Settings programable via USB or Raspberry Pi
    • Type of acquisition (one line / set of lines)
    • Number of lines
    • Length of lines acquisitions
    • Delay between acquisitions
    • Pulse width
    • Delay between pulse and beginning of acquisitions
    • 200us time-gain-compensation programmable (8 bits, from 0 to Max), every 5us
  5. Extensibility:
    • 2 x Pmod connectors
    • SMA plug for transducers
    • RPi GPIO
  6. User Interfaces:
    • 2 x PMOD for IOs
    • 3 x push button (with software noise debouncing)
    • Jumpers for high voltage selection
  7. Input Voltage:
    • 5 V from RPi or USB
    • Uses 350mA-450mA at 5V
  8. Fully Open Source:
    • Hardware: github repository
    • Software: github repository
    • Toolchain: Project IceStorm
    • Documentation: gitbook
  9. Operating Voltage:
    • FPGA and logics at at 3.3 V
    • High voltage at 25V, 50V, 75V
  10. Dimensions: @todo!
  11. Weight: @todo!

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