Digital Demodulator

Copyright © 2015 by Silicon Laboratories

11.5.15

DEMODULATOR_A CORE

Si21802

RESETB

1.2, 3.3V

SDA_MAST

SCL_MAST

XO

XTAL_I/CLK_IN

CLK_IN/OUT

DEMODULATOR_B CORE

MP_C_A

MP_A_A

MP_B_B

MP_D_B

ADC_A

TC_ADC_P_A

TC_ADC_N_A

ADC_B

TC_ADC_N_B

TC_ADC_P_B

TV Tuner

I2C Block_A

I2C Block_B

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

SCL_HOST

SDA_HOST

ADDR_A

ADDR_B

Si21802-B60

Dual ISDB-T and DVB-T/C Demodulator

Description

The Si21802 integrates two separate high-performance digital

demodulators for the Japanese and South American terrestrial

ISDB-T standard and for the DVB-T and DVB-C standards in a

single compact package. Leveraging Silicon Labs' proven digital

demodulation architecture, the Si21802 achieves excellent

reception performance for each media while significantly

minimizing front-end design complexity, cost, and power

dissipation. Connecting the Si21802 to a dual terrestrial/cable TV

tuner results in a high-performance and cost optimized TV or STB

front-end solution.

Leveraging significant field experience in DVB terrestrial

demodulation (DVB-T), the Si21802 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. DVB-T and DVB-C demodulators are

next-generation enhanced versions of proven and broadly-used

Silicon Labs’ Si2169/68/67/66/64/62/60 devices.

The cable reception allows demodulating widely deployed DVB-C

legacy standard (ITU-T J.83 Annex A/C) and the Americas' cable

standard (ITU-T J.83 Annex B).

The Si21802 offers an on-chip blind scanning algorithm for DVB-C

standard, as well as blind lock function.

The Si21802 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

segment at the center of a group of segments)

(broadcast mode supported)

and cross-bar feature

Applications