Datasheet
UG-159 Evaluation Board User Guide
Rev. A | Page 4 of 24
EVALUATION BOARD HARDWARE
The evaluation board requires the use of an SDP-S motherboard
to program the device. This is not included and must be
purchased separately. The EV-ADF4106SD1Z schematics are
shown in Figure 21, Figure 22, and Figure 23.
POWER SUPPLIES
The board is powered from external banana connectors. The
voltage can vary between 6 V and 12 V. The power supply
circuit provides 3.0 V to the ADF4106 V
DD
and allows the user
to choose either 3.0 V or 5 V for the ADF4106 V
P
. The default
settings are 3.0 V for the ADF4106 V
DD
and 5 V for the ADF4106
V
P
. Note that V
DD
should never exceed 3.3 V. This can damage
the device.
External power supplies can be used to directly drive the device.
In this case, the user must insert SMA connectors as shown in
Figure 2.
INPUT SIGNALS
The necessary reference input is from an on-board 10 MHz TCXO
from Fox electronics. This reference input can also be from an
external generator. A low noise, high slew rate reference source
is best for achieving the stated performance of the ADF4106.
This external reference source can be connected to the J11
connector. If preferred, the edge mount connector, J5, can be
inserted and used instead. To use any external reference option,
remove the 0 Ω links to R16 and R14.
Digital SPI signals are supplied through the SDP connector, J1.
Using the SDP-S platform is recommended. The SDP-B can
also be used, but Resistor R57 must be removed on the SDP-B
board. Some additional spurious low frequencies may appear if
the SDP-B connector is used.
Figure 2. Evaluation Board Silkscreen
OUTPUT SIGNALS
All components necessary for LO generation are on board. The
PLL is made up of the ADF4106 synthesizer, a passive loop filter,
and the VCO. A 5.8 GHz VCO from Z-Comm is supplied with
the evaluation board. A 60 kHz low-pass filter is inserted
between the charge pump output and the VCO input. The VCO
output is available at RFOUT through a standard SMA
connector, J2. The MUXOUT signal can be monitored at Test
Point T8 or at SMA Connector J3.
09144-002