Data Sheet

EV-RADAR-MMIC2 User Guide UG-866
Rev. B | Page 9 of 28
ADF4159 CONTROLS
The ADF4159 Controls tab controls the ADF4159 device settings
(see Figure 5).
ADF4159 Main Controls
Use the Main Controls tab to select the RF and PLL settings. In
the RF Settings pane, set the RF VCO Output Frequency value to
half the ADF5901 VCO output. Set the Reference Frequency value
to the same frequency as the applied reference signal (TCXO or
external signal) as described in the Input Signals section. The
phase frequency detector (PFD) frequency is calculated from the
reference frequency, the R counter, the reference doubler, and
the reference divided by 2. Ensure that the PFD Frequency
value matches the value specified in the loop filter design.
In the PLL Settings section, program the Charge Pump Setting
to the value designed for the loop.
Program the Phase Detector Polarity to negative when using
an inverting active loop filter configuration (use a passive loop
filter on the EV-RADAR-MMIC).
Select the signal that is connected to the output of the
MUXOUT pin from the Muxout drop down menu.
The register values are shown at the bottom of the window.
When the background of a register value is green, it indicates
the value changed and must be written to the device. Clicking the
button below each register value writes that value to the device.
13410-005
Figure 5. Main Controls Tab
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