Rev 05 Jun 2013 16:37 | Page 3
Configuring the Board
Before using the software for testing, configure the evaluation board as follows:
Connect the evaluation board to the data capture board, as shown in Figure 1.
1.
Connect one 6 V, 2.5 A switching power supply (such as the CUI, Inc., EPS060250UH-PHP-SZ that is
2.
Connect one 12 V, 3.3 A switching power supply (such as the supplied V-Infinity
3.
board.
board (P702) to the PC using a USB cable.
4.
On the ADC evaluation board, confirm that the jumpers are installed at P202, P209, P204, P205,
5.
P206, and P210 as shown in Figure 2 and Table 1.
On the ADC evaluation board, use a clean signal generator with low phase noise to provide an
6.
analog input. Use a 1 m, shielded, RG-58, 50 Ω coaxial cable to connect
the signal generator. For best results, use a narrow-band, band-pass filter with 50 Ω terminations
and an appropriate center frequency. (Analog Devices, Inc., uses TTE, Allen Avionics, and K&L
band-pass filters.)
Evaluation Board Hardware
The evaluation board provides the support circuitry required to operate the
in
their various modes and configurations. Figure 1 shows the typical bench characterization setup used
to evaluate AC performance. It is critical that the signal sources used for the analog input and clock
have very low phase noise (<1 ps rms jitter) to realize the optimum performance of the signal chain.
Proper filtering of the analog input signal to remove harmonics and lower the integrated or broadband
noise at the input is necessary to achieve the specified noise performance.
See the evaluation board pages linked from the
product pages for the complete
schematics and bill of materials (BOM). The evaluation board layout is available upon request. The
layout diagrams demonstrate the routing and grounding techniques that should be applied at the
system level when designing application boards using these converters.
Power Supplies
This evaluation board comes with a wall-mountable switching power supply that provides a 6 V, 2 A
maximum output. Connect the supply to a 100 V ac to 240 V ac, 47 Hz to 63 Hz wall outlet. The
output from the supply is provided through a 2.1 mm inner diameter jack that connects to the printed
circuit board (PCB) at P201. The 6 V supply is fused and conditioned on the PCB before connecting to
the low dropout linear regulators that supply the proper bias to each of the various sections on the
board.
The evaluation board can be powered in a nondefault condition using external bench power supplies.
To do this, remove the all the jumpers listed above (and in Table 1) to disconnect the outputs from
the on-board LDOs. This enables the user to bias each section of the board individually. Use P1, P208,
