Evaluation Board Hardware; Hardware Description; Power Supplies - Analog Devices EVAL-ADF4108EBZ1 User Manual

Evaluation Board User Guide

EVALUATION BOARD HARDWARE

HARDWARE DESCRIPTION

The evaluation board comes with a cable for connecting it to
the printer port of a PC. The silkscreen and PC cable diagram
are shown in Figure 2 and Figure 3.The board schematics are
shown in Figure 5 and Figure 6.
Figure 2. The Evaluation Board Silkscreen
EVAL-ADF411x
EVAL-ADF412x
1
6
2
7
3
8
4
9
5
9-WAY
FEMALE D-TYPE
TO
ADF411x
ADF412x
EVALUATION
BOARD
Figure 3. PC Cable Diagram
1
BLACK-CLK
2 14
15
BROWN-DATA
3
16
RED-LE
4
17
ORANGE-CE
5
PC
18
WHITE-GND
6
YELLOW
19
7
20
8
21
9
BLUE 22
10
23
11
24
12
25
PURPLE
13
25-WAY
MALE D-TYPE
TO
PC PRINTER PORT

POWER SUPPLIES

The board is powered from a single 9 V battery. The power
supply circuit gives 3.3 V to the
user to choose either 3.3 V or 5 V for the
default settings are 3.3 V for the
ADF4108 V .
P
The ADF4108 V
this can cause damage to the device.
Users can use external power supplies. However, in this case,
they need to insert SMA connectors as shown in the silkscreen
(see Figure 2) and block diagram (see Figure 1).
V is available at the output of the SMA connector, and it
TUNE
should be connected to an external VCO board. For example,
the HMC506LP4 8 GHz VCO from Hittite can be used. Connect
the output of this board back into the EVAL-ADF4108EBZ1 at
RF This splits into two equal power levels, one going to RF
IN.
and the other going to the RF
loop in the PLL. Feed the RF
the output signal. Do not exceed the
sensitivity specification of 0 dBm maximum. If the VCO output
power is greater than 6 dB, redesign the power splitting network
consisting of R8, R9, and R10 to give <0 dBm input power to
RF . For example, if using the HMC506LP4 VCO, the output
IN
power is typically 14 dBm, and the power splitting network
must be changed in this instance.
Rev. 0 | Page 3 of 8
ADF4108 V
DD
ADF4108
ADF4108 V
should never exceed the ADF4108
DD
of the ADF4108
IN
to a spectrum analyzer to test
OUT
ADF4108
UG-160
and allows the
V . The
P
and 5 V for the
DD
V because
P
OUT
to close the
RF input
IN