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ADRF6720-27ACPZ-R7 датащи(PDF) 30 Page - Analog Devices

номер детали ADRF6720-27ACPZ-R7
подробное описание детали  Wideband Quadrature Modulator with Integrated Fractional-N PLL and VCOs
PDF  44 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADRF6720-27ACPZ-R7 датащи(HTML) 30 Page - Analog Devices

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Data Sheet
ADRF6720-27
Rev. B | Page 29 of 43
Figure 60. PFD Spurious Emissions on Modulator Output, fLO + N × fPFD;
fLO = 1781.76 MHz, RFOUT ≈ 4 dBm at 25°C, fREF = 61.44 MHz at 4 dBm, fPFD =
15.36 MHz, Integer PLL Mode
LAYOUT
Solder the exposed pad on the underside of the ADRF6720-27
to a low thermal and electrical impedance ground plane. This
pad is typically soldered to an exposed opening in the solder
mask on the evaluation board. Notice the use of 25 via holes on
the exposed pad of the ADRF6720-27 evaluation board.
Connect these ground vias to all other ground layers on the
evaluation board to maximize heat dissipation from the device
package.
Figure 61. Evaluation Board Layout for the ADRF6720-27 Package
LO
N = 8
N = 1
N = 20
FREQUENCY (MHz)
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
2050
2100
2150
1750
1800
1850
1900
1950
2000
TA = –40°C
TA = +25°C
TA = +85°C



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