Skyworks Si57 -EVB Series, Руководство пользователя

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Si57x-EVB
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 9
Rev. 0.2 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 14, 2021
1.9. Si57x Daughterboard
The Si57x daughterboard can accommodate either Si570/571/598/599 devices and supports all output formats. All
Si570 and Si598 XOs are pin and register compatible, and all Si571 and Si599 VCXOs are pin and register
compatible. Typically, the boards are shipped without the sample device or any output components. Table 4 lists
suggested output loading options for different output formats and coupling configurations.
Table 4. Si57x Daughterboard Output Loading Options
Output
Format
Config REF DES
Location
Value Comments
CML
AC coupling
only
C2,C3 0.1 µF
ac coupling capacitors
CMOS
Near end load
on board
J3 CONN, HEADER, 2X1 High Z probe test point
R3 15 pF Install 0603 load capacitor at resistor location.
Far end
load off board
C3 33–50

Install 0603 source impedance matching resistor at
capacitor location for driving transmission line.
LVDS
AC coupling C2, C3 0.1 µF ac coupling capacitors
DC coupling C2, C3 0  Install 0603 resistors at cap locations.
LVPECL
AC coupling
C2, C3 0.1 µF ac coupling capacitors
R2, R3 130–150  Local bias resistors
DC coupling C2, C3 0  Install 0603 resistors at cap locations.