CN0269 Datasheet, PDF (11/12 Pages) Analog Devices – Devices Connected

Circuit Note
CIRCUIT EVALUATION AND TEST
This circuit uses the EVAL-CN0269-SDPZ circuit board and
the EVAL-SDP-CB1Z SDP-B System Demonstration Platform
controller board. The two boards have 120-pin mating connectors,
allowing for the quick setup and evaluation of the performance
of the circuit. The EVAL-CN0269-SDPZ board contains the circuit
to be evaluated, as described in this note, and the SDP-B controller
board is used with the CN-0269 evaluation software to capture
the data from the EVAL-CN0269-SDPZ circuit board.
Equipment Needed
The following equipment is needed:
• PC with a USB port and Windows® XP (32 bit), Windows
Vista®, or Windows 7
• EVAL-CN0269-SDPZ circuit board
• EVAL-SDP-CB1Z SDP-B controller board
• CN-0269 SDP Evaluation Software
• 6 V dc (500 mA), ±12 V(300 mA) power supply
• Low distortion signal generator to provide ±10 V output
with frequency from dc to 1MHz
Getting Started
Load the evaluation software by placing the CN-0269
evaluation software into the CD drive of the PC. Using My
Computer, locate the drive that contains the evaluation software.
Functional Block Diagram
See Figure 1 for the circuit block diagram and the EVAL-CN0269-
SDPZ-SCH-RevX.pdf file for the complete circuit schematic. This
file is contained in the CN-0269 Design Support Package. A
functional block diagram of the test setup is shown in Figure 24.
CN-0269
±12 V dc power supply to the pins on CN1, CN2 marked with
+6 V, ±12 V and GND on the board. If available, a 6 V wall wart
can be connected to the barrel connector on the board and used
in place of the 6 V power supply. Connect the USB cable supplied
with the SDP-B board to the USB port on the PC. Do not connect
the USB cable to the Mini-USB connector on the SDP-B board at
this time. Turn on the 6 V and ±12 V power supply at the same
time and then connect the USB cable to the Mini-USB
connector.
Test
With the 6 V and ±12 V power supply on, launch the evaluation
software. Once USB communications are established, the SDP-B
board can be used to send, receive, and capture data from the
EVAL-CN0269-SDPZ board and do the data analysis under
time and frequency domain to evaluate the performance of the
whole circuit.
Figure 25 shows a photo of the EVAL-CN0269-SDPZ evaluation
board connected. Information regarding the SDP-B board can
be found in the SDP-B User Guide.
Information and details regarding test setup and calibration, and
how to use the evaluation software for data capture can be found in
the CN-0269 Software User Guide.
6V DC ± 12V DC
POWER SUPPLY
PC
USB
CABLE
SIGNAL
GENERATOR
CN1 AND CN2
J2 ~ J5
USB
Figure 25. EVAL-CN0269-SDPZ Evaluation Board
10.000V
+G –
120
JP3
PINS
EVAL-SDP-CB1Z
SDP BOARD
JP4
Connectivity for Prototype Development
The EVAL-CN0269-SDPZ evaluation board is designed to be
evaluated with the EVAL-SDP-CB1Z SDP-B board based on the
Black-Fin DSP through SPORT port; however, any microprocessor
can be used to interface to serial port of AD7984 through the 14
EVAL-CN0269-SDPZ
BOARD
pin PMOD connector. In order for another controller to be used
Figure 24. Test Setup Block Diagram
Setup
Connect the 120-pin connector on the EVAL-CN0269-SDPZ
circuit board to the CON A connector on the EVAL-SDP-CB1Z
controller board (SDP-B). Use nylon hardware to firmly secure
the two boards, using the holes provided at the ends of the 120-pin
connectors. With power to the supply off, connect a 6 V and
with the EVAL-CN0269-SDPZ evaluation board, software must
be developed by a third party.
There are existing interposer boards that can be used to interface to
the Altera and Xilinx field programmable gate arrays (FPGAs).
The BeMicro SDK board from Altera can be used with the
BeMicro SDK/SDP interposer using Nios Drivers. Any Xilinx
evaluation board that features the FMC connector can be used
with the FMC-SDP Interposer board.
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