DataStorm DAQ (Trenz Cyclone-V SoC Development Kit (TEI0022))

Analog Devices AD7768-1 Development Board

The AD7768-1 Platform uses 2 boards. The Cyclone-V SoC Development Kit, and the EV-AD7768-1FMCZ board connects via an FMC interface.

The DataStorm DAQ is based on the Intel Cyclone V SoC FPGA. It features, 1GB DDR3 each for the HPS and FPGA, 32MB QSPI memory each for the HPS and FPGA, Ethernet, and Power. For details, visit the Trenz Electronics Technical Reference Manual Wiki page.

The major components of the DataStorm DAQ are identified by numbers:

Intel Cyclone-V SoC

• SE Processor:
  • Single or Dual ARM Cortex® A9 MPU
  • Up to 925 MHz max clock speed
  • 32KB L1 Program Cache (per core)
  • 32KB L1 Data Cache (per core)
  • 512 KB L2 Cache (shared)
  • 181 HPS I/O pins
  • 1 Hard Memory Controller (LPDDR2, DDR2, DDR3)
• FPGA Fabric:
  • Up to 110K Logic Elements (LE)
  • Up to 5.5Mb M10K Memory
  • Up to 621Kb MLAB Memory
  • Up To 112 Variable Precision DSP blocks
  • Up to 224 18x18 multipliers
  • Up to 288 User FPGA I/O pins
  • 1 Hard Memory Controller (LPDDR2, DDR2, DDR3)

FPGA DDR3
HPS DDR3
FMC LPC Connector
PMOD x4
microSD Card Connector
Ethernet PHY
RJ-45 Ethernet Connector
USB PHY
USB HUB
dual USB-A Connector
HDMI Transmitter
HDMI Connector
Intel MAX10
micro-USB to UART Connector for HPS Console
USB to JTAG and UART FTDI Bridge
micro-USB to JTAG and UART Connector for FPGA
SMA Connector
Push Button
LED
4-bit DIP Switch
12 VDC Power Jack
Clock Generator
Programmable Clock Generator
QSPI for HPS
QSPI for FPGA
Temperature Sensor
EEPROM

The EV-AD7768-1FMCZ evaluation kit (aka EVAL-AD7768-1) features the AD7768-1 24-bit, 256 kSPS, analog-to-digital converter (ADC). A 7V to 9V external bench top supply is regulated to 5V and 3.3V to supply the AD7768-1 and support components.

The EV-AD7768-1FMCZ is an evaluation board that allows the user to evaluate the features of the ADC.

Full specifications on the AD7768-1 are available in the product data sheet, which should be consulted in conjunction with this user guide when working with the evaluation board.

Full descriptions of these products are available in their respective data sheets, which must be consulted when using the corresponding evaluation board.

AD7768-1® - Precision simultaneous single channel 24-bit Sigma-Delta ADC
ADR4540 - High Precision, Low Power, Low Noise Voltage Reference for AD7768-1
ADA4807-2 - Low Power Rail-to-Rail Input and Output, Voltage Feedback Amplifiers
ADA4940 - Low Noise, Low Distortion Fully Differential Amplifiers for AIN inputs
ADP7118 - CMOS, Low Dropout Linear LDO for +3.3V, +5V, +7V Voltage supply.
EEPROM

The block diagram of the EV-AD7768-1FMCZ® Eval board (below) shows the major components. Each analog input has the option of using the ADA4940 amplifier with a gain of 1 or bypassing it using jumpers. conversion results from the AD7768-1 are communicated to the FPGA via the FMC-LPC connector using 8 source synchronous serial streams. There is also an SPI interface for Control functions.

The EV-AD7768-1FMCZ evaluation kit features the AD7768-1 24-bit, 256 kSPS, analog-to-digital converter (ADC). It incorporates the ADA4940 rail-to-rail output amplifier with Gain=1 to buffer the input signals before applying them to the ADC inputs. The AD7768-1 expects the input signals to swing between AVSS and AVDD1. However, the EV-AD7768-1FMCZ board is set up to use the ADA4807 buffers which offset the inputs by VCOM. VCOM starts out as an output from the AD7768_1 (VCM_OUT) at (AVDD1-AVSS)/2 and goes through select jumpers (0 ohm resistors) VCM, and unity gain voltage follower as seen below. This means that the user is expected to provide a true differential input centered at AVSS, and the VCOM takes care of shifting it up.

By default, VCM is set to position A.

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