Xilinx Analog Mixed Signal XADC Evaluation Note: Agile Mixed Signal is Now Analog Mixed Signal Xilinx Training

Welcome This module introduces the 7 series AMS Targeted Design Platform Evaluate XADC performance Demonstrates AMS capabilities This module provides an overview of XADC Evaluation Graphical User Interface for evaluating the XADC block

To Learn More About Xilinx Agile Mixed Signal Related Videos What is the Xilinx Agile Mixed Solution? For beginners and enthusiasts Xilinx AMS EDK Design Flow For embedded designers who want to become familiar with the EDK flow Xilinx AMS HDL Design Flow For digital designers who want to become familiar with HDL flow

AMS Design Flow 1. Evaluate 2. Implement 3. Simulate

Need for Analog Signal Conditioning The external signal needs to be conditioned to map input range of XADC (0-1V) Implement custom circuits to bring down the voltage range of signal Use Programmable logic to customize Control logic Signal processing Calibration RTD Sensor 7 Series FPGA or Zynq EPP Photo Sensor Analog Signal Conditioning Current & Voltage sensor XADC DSP RPM Sensor Flexible Analog Interface Configure analog inputs ADC timing Change at any time

Evaluate XADC Performance to Match Platform Needs Acquisition Time Conversion Time Status Registers ADC Results T/H ADC 1 DIFFERENTIAL ANALOG INPUTS Control Registers MUX On-Chip Sensors T/H ADC 2 DRP VP/VN minimum acquisition time ~3 ns VAUXP/VAUXN minimum acquisition time ~300 ns

Unipolar and Bipolar and Transfer Functions

On-Chip Sensors

Analog Sensor Compensation in the Digital Domain Analog Sensor Output Linearity Error After Digital Correction After Digital Correction Calibrate Gain & Offset Errors Analog Sensor Output

KC705 TDP Facilitates XADC Evaluation for Performance AMS Targeted Design Platform KC705 evaluation board AMS FMC evaluation card AMS Targeted Reference Design ISE® 13.4 Design Suite Documentation Targeted Reference Design

AMS Evaluation Card Enables user to evaluate performance of XADC in all operating modes as described in XADC User Guide (UG480) On-board signal source Dual, high-quality DAC (AD5065) Both single ended and differential supported Signal conditioning circuitry Two dual OPAMP ICs (ADA4841) BNC connectors to bring in external signal generators External power supply jacks 20-pin header for interfacing to a TDP Jumpers for routing signal connections to FPGA

Setup for Evaluating the XADC Optional External Instrument (e.g. signal generator) XADC Evaluation Card Resources (DACs) for basic testing and connectors for external instruments Ribbon cable connection to “analog header” on KC705 USB KC705 National Instruments LabView GUI XADC settings ADC data collection and analysis

Targeted Reference Design Facilitates evaluation of key performance metrics of Xilinx Analog to Digital Convertor (XADC) Demonstrates the capabilities of AMS using the Decimation filter The design running on the FPGA is built using the Embedded Development Kit (EDK) All blocks represented in the FPGA design are available as IP cores from Xilinx

XADC Evaluation GUI Developed using National Instrument’s LabView run-time environment Run key performance tests with XADC evaluation GUI Configure XADC Configure signal source on AMS evaluation card Perform time domain and frequency domain analysis of XADC data Perform a linearity test Demonstrates the capabilities of AMS using the Decimation filter implemented in the Targeted Reference Design

XADC Evaluation GUI (continued) DAC Control XADC Configuration Control Sampling rate When Simultaneous sampling modes is selected VAUX0 and VAUX8 are selected.

Change the actual voltage applied to FPGA here XADC On-Chip Sensors Change the actual voltage applied to FPGA here

Document the settings after achieving satisfied results XADC Registers Tab Document the settings after achieving satisfied results

AMS Demonstration (Decimation Filter) Change Decimation Rate SNR Being Improved

Summary Evaluate the XADC for input voltage range, resolution, and performance Input signal to XADC must be conditioned to match the input range of XADC block Then evaluate the XADC for performance 7 series AMS TDPs enable XADC evaluation ADC Evaluation Kit is bundled with all 7 series TDPs XADC Evaluation application provides user friendly GUI for evaluating XADC block Pick required XADC settings (attributes) and evaluate performance Implement the XADC core in your HDL design flow Use the documented settings captured during evaluation phase to configure the core Customizes the core using the CORE Generator™ interface and generate files for instantiation and simulation Write HDL code to perform autonomous operation on XADC for sensing the analog input Refer to the XADC User Guide (UG480) for more information on XADC operating modes and timing

Where Can I Learn More? Learn more at www.xilinx.com/AMS Agile Mixed Signal white paper (WP392) XADC User Guide (UG480) Watch more videos of Xilinx AMS Visit www.xilinx.com/innovation/7-series-fpgas.htm Application examples New 7 series documentation Xilinx training courses www.xilinx.com/training Xilinx tools and FPGA architecture courses Hardware description language courses 7 series design courses Basic FPGA architecture, basic HDL coding techniques, and other free Videos Page 20

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