SI2107-X-FM SILABS [Silicon Laboratories], SI2107-X-FM Datasheet - Page 19

• Manufacturer Part Number: SI2107-X-FM
• Description: SATELLITE RECEIVER FOR DVB-S/DSS WITH QUICKLOCK AND QUICKSCAN
• Manufacturer: SILABS [Silicon Laboratories]

4. Part Versions
There are four pin- and software-compatible versions of
this device. All versions include the L-band tuner, DVB-
S/DSS demodulator and channel decoder, and LNB
signaling controller. Furthermore, the Si2108 and
Si2110 integrate an efficient LNB supply regulator while
allowing operation with an external LNB supply
regulator circuit. The LNB supply controller utilizes a
step-up converter architecture. In case operation with
an external regulator is desired, Si2107 and Si2109 can
be used; these do not integrate the LNB step-up dc-dc
controller.
On the other hand, the Si2109 and Si2110 integrate an
on-chip “blindscan” accelerator, QuickScan, which
allows the implementation of a very fast channel scan,
an important feature for end products targeted to free-
to-air (FTA) applications in which channel locations are
unknown. Si2107 and Si2108 do not integrate this
accelerator and are a good fit when symbol rates and
frequencies of satellite channels are known, as in the
case of pay-TV receivers or for FTA receivers in which
the embedded firmware contains the channel tuning
information. Table 13 summarizes the differences
between part versions.
Number
Si2110
Si2109
Si2108
Si2107
Part
Demodulator with
Integrated Tuner/
Integrated LNB
Table 13. Device Versions
DVB-S/DSS
Messaging
Y
Y
Y
Y
LNB Supply
Regulator
N
N
Y
Y
QuickScan
Preliminary Rev. 0.81
N
N
Y
Y
Si2107/08/09/10
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