On this page is presents a project of an electrically isolated interface from the machine to be used in industrial or research environments.
The card is developed with Eagle V6.3, on 4 layers, from the link below you can download the sch and brd files.
Eagle carrier board project Frontend_Pitaya_advanced_brd_sch_Eagle
The gerber files is here Frontend_Pitaya_next_gerber
Full schematics carrier board and isolated ADC->Frontend_Pitaya_advanced_images and schematics
High speed isolated ADC -> RFX_transient_recorder_and_documents
About the project documents -> Frontend_and transient recorder_Documents
Analog frontend to Pitaya interface.
To connect the analog module to FPGA it must to generate on dedicated GPIO high signal to send to CNVST command pin. the ADC performs the conversion, and responds with a serial 18bit string of SDOUT-> SDATA, synchronized by the SCLK.
In the above image, Piatya to ATCA ISOL Module resistor adapter.
If you drive more frontend modules is need that the FPGA, for each one, produces a RESET output to enable the ADC, a CNVST output to start the conversion and two LVDS SDIN and SCLK inputs to connect to a 18 bit shift register to be defined in VHDL internally of the FPGA area.
Download brd and gerber -> frontend_pitaya_resistors_interface_and_gerber