Evaluation Board User Guide
EVALUATION BOARD HARDWARE
The following instructions are for setting up the physical connections to the AD9551 evaluation board.
SETTING UP THE POWER AND PC CONNECTIONS
Set up the power and PC connections as follows:
1.Install the AD9551 evaluation software before connecting the evaluation board to your PC for the first time (see the Installing the Software section). Administrative privileges are required for installation.
The AD9551 has the option of either being pin or register programmable. If the pin programmable option is desired, then no software is needed to control the part. However, it is recommended to install the software because if it is not installed, the computer will recognize the evaluation board as new hardware and attempt to install drivers.
2.Connect the USB cables to the evaluation board and the computer.
The red LED labeled VBUS (CR2) on the AD9551 evaluation board should illuminate, and the USBSTAT LED should start blinking. If the USBSTAT LED is not blinking, ensure that the USB port on the PC is operational and that the USB cable is not damaged.
3.If the Found New Hardware Wizard automatically appears when the evaluation board is connected, select
Install the software automatically and then click Next.
The Found New Hardware Wizard may appear twice, and a system restart may be required.
Refer to the Evaluation Board Software section for details on running the AD9551 evaluation board software.
SETTING UP THE SIGNAL CONNECTIONS
After setting up the power and PC connections, use the following procedure to set up the signal connections:
1.Connect a signal generator to REF A SMA Connector J1.
By default, the reference inputs on this evaluation board are
2.To connect a signal to REF B, connect the signal to SMA Connector J2.
3.Connect an oscilloscope, spectrum analyzer, or other lab equipment to any of the J3 to J6 SMA connectors on the upper right side of the board. The output connectors are single ended. A 50 Ω termination should be placed on all unused outputs.
BYPASSING THE USB POWER SUPPLY
The evaluation board can be configured to supply power to the AD9551 from an external power supply. Bypass the USB power supply as follows:
1.Remove the F2 ferrite bead (located on the backside of the board).
2.Connect a bench power supply to Pin 3.3V_1 of TB1 on the evaluation board. In addition, resistors on the evaluation board can be removed to further separate power supply connections to the AD9551. This is useful for measuring the AD9551 power consumption. Refer to the evaluation board schematics provided on the CD in the evaluation board kit (also available at www.analog.com) for further details.
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