User guide
Hardware guide
Hardware configuration
The EVAL-AD9265 board connects to the FPGA carrier via the FMC LPC connector.
On the ZC706, configure the boot mode switch SW11 for SD card or JTAG boot and ensure VADJ is set to 2.5 V. Refer to the ZC706 Quickstart guide for more details.
Power supply
The EVAL-AD9265 board is powered through the FMC LPC connector from the FPGA carrier board. The carrier board itself (e.g., ZC706) requires a 12 V external power supply.
The required VADJ for the FMC LPC interface is 2.5 V.
On-board connectors
Connector |
Type |
Description |
|---|---|---|
J100 |
SMA |
Analog signal source input |
J201 |
SMA |
External clock signal input for ADC sampling |
J202 |
SMA |
External amplified signal input for ADC sampling |
J300 |
Jumper |
Configuration for the optional clock path using the AD9517 (RESET, SYNC, PD and REF_SEL pins) |
P1 |
Jumper |
AD9265 Clock divider synchronization |
P2 |
Jumper |
On-board oscillator enable (Pin 1–Pin 2 = on-board oscillator on; Pin 2-Pin 3 = on-board oscillator off) |
P300 |
Jumper |
Optional clock status pins (REFMON, LD and STATUS) |
FMC LPC |
FMC |
FPGA carrier board interface |
Analog inputs
Connect a low-noise, low-distortion signal source to the analog input of the EVAL-AD9265 board via the J100 SMA connector.
The full-scale differential input range is 2 V peak-to-peak (1 V peak on each side). The common-mode input voltage (VCM) is provided by the on-board reference and defaults to VREF/2 = 1.0 V.
Clock input
The EVAL-AD9265 board provides three possible clock paths (some board modification may be necessary):
External passive clock (default) — connect an external clock source to the J201 SMA connector after removing the P2 connector.
Optional active clock path using the AD9517.
Optional oscillator — on-board oscillator selectable via P2 jumper.
Ensure the corresponding components are removed or inserted on the board to select the desired clock path. For optimal performance, use a low-jitter, low-phase-noise clock source.
Schematic, PCB Layout, Bill of Materials
Design files are available on the product page:
Software guide
The evaluation board is supported through the Libiio library, which is cross-platform (Windows, Linux, Mac) with bindings for C, C#, Python, MATLAB, and others. Applications that interface via libiio include:
IIO Oscilloscope — graphical waveform and spectrum analyzer
Scopy v2.0 or later (requires the IIO plugin)
Analog Devices Hardware Python Interfaces — Python interface
For a step-by-step walkthrough of connecting and using these tools with the EVAL-AD9265, see the ZC706 Quickstart or ZedBoard Quickstart guides.
IIO device
When the system is booted and the EVAL-AD9265 is detected, the following IIO devices should appear:
~$
iio_info | grep iio:device
iio:device0: ad7291
iio:device1: xadc
iio:device2: ad9265 (buffer capable)
The ad9265 IIO device exposes the following channels:
voltage0: ADC input channel (buffer capable)
Channel attributes include:
raw— raw ADC sample valuescale— conversion factor from raw to millivoltssampling_frequency— current sample rate in Hzhardwaregain— input gain setting (if applicable)