Digital Demodulator Copyright © 2012 by Silicon Laboratories 9.17.2012
HDTV MPEG S.o.C.
Si2166B
HOST_SCL
HOST_SDA
FRONT
END
OSC
& PLL
QPSK
8PSK
DEMOD
S_ADC_IN
S_ADC_IP
S_ADC_QN
S_ADC_QP
ADC (I)
ADC (Q)
EQUAL-
IZER
I
2
C
SWITCH
TUN_SDA
TUN_SCL
GPIOCTRL
MPEG TS
INTERFACE
I
2
C
I/F
MP_x
GPIO_0
RESETB1.2, 3.3V
DSP &
SYNCHRO
DVB-S/S2
FEC MODULE
DiSEqC
TM
2.0
DISEQC_IN
DISEQC_OUT
AGCs
Ext. Clk or Xtal
QPSK / 8PSK
Satellite
ZIF Tuner
CLK_IN_OUT
LDPC BCH
VITERBI RS
TS_ERR/
GPIO_1
TS_SYNC
TS_VAL
8
TS_CLK
TS_DATA
Si2166-B20
DVB-S/S2 Satellite TV Demodulator
Description
The Si2166-B20 integrates DVB-S, DVB-S2
(AMC-compliant), and DSS digital demodulators into a
single CMOS chip for the broadest range of satellite TV
standards. Leveraging Silicon Labs' proven digital
demodulation architecture, the Si2166-B20 achieves
superior satellite reception performance while minimizing
front-end design complexity and cost.
The satellite demodulation functionality allows
demod
ulating widely deployed DVB-S, DIRECTV™ (DSS)
legacy standards, and new generation DVB-S2 satellite
broadcast. A zero-IF interface with two high-speed ADCs
allows for a seamless connection to market proven satellite
silicon tuners. Constant Coding Modulation (CCM), QPSK/
8PSK demodulation schemes and broadcast profile are the
main specifications of the DVB-S2 demodulator. Silicon
Labs' innovative LDPC and BCH decoding architecture
delivers best-in-class reception while exhibiting low power
dissipation.
For DVB-S/DSS standards, an innovative and advanced
FEC de
coding scheme is implemented resulting in higher
performance.
The Si2166-B20 offers an on-chip blind scanning algorithm
fo
r DVB-S and DVB-S2 standards (as well as blind lock
function). It also integrates DiSEqC™ 2.0 LNB interface for
satellite dish control.
The Si2166-B20 programmable Transport Stream interface
provid
es a flexible range of output modes and is fully
compatible with all MPEG decoders or conditional access
modules to support any customer application. Si2166-B20
is software compatible with Si2166-A10 and is also fully
API compatible with Si2167-B and Si2168/69.
Features
- DVB-S2 (ETSI EN 302 307 and TR102-376)
- QPSK/8PSK demodulator and FEC decoder
- Broadcast profile: CCM, 64800 bits frame, single TS
-
1 to 45 MSymbol/s (optimized for 2 to 32 MSymbol/s)
- DIRECTV™ AMC compatible
- DVB-S (ETSI EN 300 421)
- QPSK demodulator and enhanced FEC decoder
- 1 to 45 MSymbol/s
- DIRECTV™ DSS compliant
- DiSEqC™ 2.0 interface and Unicable support
- I
2
C serial bus interfaces (master and host)
- Two ADCs with differential inputs (ZIF input)
- GPIOs and multi-purpose ports for independent AGCs
(up to 4) to control satellite tuner
- Firmware control for upgradeability
- Flexible TS interface with serial or parallel single output
- Fast lock times for all media
- Only two power supplies: 1.2 and 3.3 V
- Pin-to-pin compatibility with former Si2167/66-A10 and
Si2167-B, Si2168/69
- 7x7 mm, QFN-48 pin package, Pb-free/RoHS compliant
Applications
- Full-NIM
- iDTV (integrated Digital TV)
- Digital satellite STB
- PC-TV accessories
- PVR, DVD, and Blue Ray disc recorders
