The SKYA21029 is a single-pole, four-throw (SP4T) antenna
switch with an internal 50 Ω termination. The high-linearity
performance and low insertion loss achieved by the
SKYA21029 make it an ideal choice for embedded cellular
telematics modules and OBD-II cellular modems.
The symmetric port designs provide flexibility in signal routing for
both receive diversity and higher power TD-SCDMA/TDD-LTE,
WCDMA/FDD, and LTE transmit/receive applications.
Switching is controlled by three CMOS/TTL-compatible control
voltage inputs (V1, V2, and V3). Depending on the logic voltage
level applied to the control pins, the ANT pin is connected to one
of four switched RF outputs (RF1 to RF4) using a low insertion
loss path, while the paths between the ANT pin and the other RF
pins are in a high isolation state.
The antenna path can also be closed on a 50 Ω load when it
needs to be terminated. The 50 Ω load is internally grounded. No
external blocking capacitors are required on the RF paths unless
VDC is externally applied.
The SKYA21029 is manufactured in a compact, 14-pin
2.0 x 2.0 mm, Quad Flat No-Lead (QFN) package.