AD9520-1/PCBZ Analog Devices Inc, AD9520-1/PCBZ Datasheet - Page 6

• Manufacturer Part Number: AD9520-1/PCBZ
• Description: BOARD EVAL FOR AD9520-1
• Manufacturer: Analog Devices Inc

Specifications of AD9520-1/PCBZ

• Design Resources: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121) Phase Coherent FSK Modulator (CN0186)
• Main Purpose: Timing, Clock Generator
• Embedded: No
• Utilized Ic / Part: AD9520-1
• Primary Attributes: 12 LVPECL/24 CMOS Output Clock Generator with 2.5 GHz VCO
• Secondary Attributes: SPI and I2C Compatible Control Port
• Silicon Manufacturer: Analog Devices
• Application Sub Type: PLL Clock Synthesizer
• Kit Application Type: Clock & Timing
• Silicon Core Number: AD9520-0, AD9520-2, AD9520-2
• Silicon Family Name: AD9520-X
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UG-076
6.
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9.
10. Set the VCO divider by clicking the green VCO box in the
Program the R (reference) divider by clicking the
R DIVIDER box at the top of the main window.
Set the desired value and click OK (see Figure 13).
Program the N (feedback) divider by clicking the
N DIVIDER box at the top of the main window.
Set the desired value and click OK. For this example,
N = 5500 can use 8/9 dual modulus mode with A = 4
and B = 687.
Set the charge pump current (1.2 mA in this case) by
clicking the CHARGE PUMP box in the upper right
corner of the main window, and click OK.
Note that if the desired configuration has the phase
detector frequency above 50 MHz, an antibacklash
pulse width of 1.3 ns may work better. This setting is
accessed by clicking the PFD box to the left of the
CHARGE PUMP box. However, this setting normally
does not need to be modified.
center of the main window immediately to the left of the
Cal VCO button.
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11. Power down unused drivers by clicking the numbered
12. Set the channel dividers by clicking DIVIDER 0 through
13. Click the flashing red WRITE button under the REGISTER
14. Click the blinking yellow Cal VCO button to load the
triangular symbol (see Figure 7) on the right side of the
main window, and then clicking Safe Power Down.
DIVIDER 3, and entering the divider ratio.
W/R section. This loads the desired settings to the AD9520
evaluation board.
VCO calibration window. The default VCO divide ratio
(16) works for all applications. Click the Cal VCO button
in the Calibrate VCO window to begin calibration (see
Figure 19). The PLL should now be locked and the lock
detect (LD) LED on the left side of the board should be on.
Evaluation Board User Guide
Figure 7. Driver Symbol