Dual Digital Demodulators

Copyright © 2015 by Silicon Laboratories

11.5.15

I2C Block_A

DEMODULATOR_A CORE

DiSEqC_A

ADC_A

ADC_A

ADC_A

Si21832

SCL_HOST

SDA_HOST

RESETB

1.2, 3.3V

DiSEqC_IN_A_B

SDA_MAST

SCL_MAST

XO

XTAL_I/CLK_IN

CLK_IN/OUT

I2C Block_B

DEMODULATOR_B CORE

DiSEqC_B

ADC_B

ADC_B

ADC_B

DiSEqC_OUT_A

DiSEqC_CMD

TC_ADC_P_A

TC_ADC_N_A

S_ADC_IN_A

S_ADC_IP_A

S_ADC_QN_A

S_ADC_QP_A

Dual Satellite

Tuner

TC_ADC_N_B

TC_ADC_P_B

S_ADC_QP_B

S_ADC_QN_B

S_ADC_IP_B

S_ADC_IN_B

DiSEqC_OUT_B

MP_C_A

MP_A_A

MP_B_B

MP_D_B

ADDR_A

ADDR_B

TV Tuner

TV Tuner

TS1_CLK

TS1_SYNC

8

TS1_DATA

TS1_VAL

TS2_SYNC

8

TS2_DATA

TS2_VAL

TS2_CLK

GPIO0/

TS_ERR_B

TS_A

TS_B

GPIO1/

TS_ERR_A

Si21832-B60

Dual ISDB-T and DVB-T2/C2/S2/S2X/T/C/S Digital TV Demodulator

Description

The Si21832B integrates two separate high-performance digital

demodulators for the Japanese and South American terrestrial

ISDB-T standard and for the DVB-T2/T, DVB-C2/C, DVB-S2/S and

DVB-S2X standards into a single compact package. Leveraging

Silicon Labs' proven digital demodulation architecture, the

Si21832B achieves excellent reception performance for each

media while significantly minimizing front-end design complexity,

cost, and power dissipation. Connecting the Si21832B to both a

dual terrestrial/cable TV tuner, and a dual satellite tuner, results in

a high-performance and cost optimized TV front-end solution.

Leveraging significant field experience in DVB terrestrial

demodulation (DVB-T2/T), the Si21832B dual demodulator can

accept standard or low-IF inputs (differential) and complies with

the Brazilian SBTVD-T terrestrial specifications (ABNT NBR

16.601 and 15.604). Main features include fast channel scan, very

short lock times, state of the art CCI performance, partial

reception, and auxiliary channels decoding.

Silicon Labs’ internally-developed DVB-T2 (including T2-Lite)

demodulators support all modes specified by the DVB-T2 standard

(V1.4.1). Main features of the DVB-T2 mode are, SISO and MISO

support, FEF management, fully autonomous signal acquisition

including automatic L1 signaling parsing support for all pilot

patterns, and DVB-T2/T auto-detection. The DVB-T and DVB-C,

including ITU-T J.83 annex B, demodulators are enhanced

versions of proven and broadly used Si2164/67/68/69 Silicon Labs

devices.

The satellite reception allows demodulating widespread DVB-S,

DIRECTV™ (DSS), DVB-S2, DIRECTV™ (AMC) legacy

standards, and new Part II of DVB-S2 (S2X) satellite broadcast

standard. A zero-IF interface (differential) allows for a seamless

connection to market proven satellite silicon tuners. It also

integrates two DiSEqC™ 2.0 LNB interfaces for satellite dish

control and, for each satellite demodulator, an equalizer to

compensate for echoes in long cable feeds from the LNB to the

satellite tuner RF input.

The Si21832B offers an on-chip blind scanning algorithm for

DVB-S/S2/S2X and DVB-C standards, as well as blind lock

function. The Si21832B embeds two independent programmable

transport stream interfaces which provide a flexible range of output

modes, including a cross-bar functionality, and are fully compatible

with all MPEG decoders or conditional access modules to support

any customer application.

Features

and Si218x2

(<40 MSps in 32APSK)

(broadcast mode supported)

ential ZIF I/Q inputs for satellite tuners

outputs and cross-bar feature

Applications