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SI2165: 产品描述Multi-Standard DVB-T and DVB-C Demodulator; 文件大小66KB，共2页; 制造商SILABS; 官网地址http://www.silabs.com

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SI2165概述

Multi-Standard DVB-T and DVB-C Demodulator

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Si2165

Multi-Standard DVB-T and DVB-C Demodulator

Description

The Si2165 is a compact standalone DVB-T/C digital TV

demodulator ideally matching Silicon Labs’ Si2170/1/2 new

hybrid high-performance silicon tuner product family. The analog

front-end consists of two ADCs with wide dynamic range (12-bit)

to allow operation with standard IF (~36 MHz), Low-IF, or Zero-IF

inputs. This enables the use of the Si2165 with any TV tuner,

either metal can or silicon tuner based.

The multi-standard demodulator supports all modes of DVB-T

(EN 300 744), including hierarchical modes. The Si2165 also

supports ITU J.83 annex A/C and DVB-C (EN 300 429),

including a user-configurable 31-tap equalizer. In addition to

DVB-T's legacy modes, the Si2165 also complies with DVB-H

(EN 300 744 Annex F) specificities: 4K FFT, extended TPS,

“native” and “in-depth” deinterleavers. The Si2165 is able to

receive DVB-H programs in fixed receiver applications (without

decoding the additional MPE FEC layer).

An embedded 32-bit DSP controls device operation.

Sophisticated on-chip algorithms ensure optimum reception

even under difficult channel conditions, such as echoes outside

the guard interval, pre-echoes, or strong impulse noise. For

ease-of-use, DSP firmware is preloaded into ROM (device is

immediately active at powerup). Nevertheless, there is a

possibility of downloading additional patch code via the I

interface (e.g., to adjust the demodulator to unexpected

conditions or reception impairments).

Thanks to proprietary features, the Si2165 supports ultra-fast

channel scanning for VHF/UHF terrestrial and cable DTV

channels. For supported tuners, the Quickscan algorithm for

blindscan is running onto the embedded DSP (in order to limit the

host CPU load) and is provided as a downloadable patch file.

Serial or parallel master MPEG TS output modes are supported.

Furthermore, a TS slave parallel mode is available via a GPIF port

and provides a glueless interface to Silicon Labs' MCU devices

with embedded USB interface. The user can optionally program a

32-PID hardware filter to reduce the output TS bit rate.

An internal I

C pass-through logic switch acts as an I

C repeater.

This provides a “quiet” I

C bus to the RF front end.

A maximum of six general-purpose inputs/outputs are available;

three GPIOs also feature

/

and interrupt output capabilities.

Best-in-class demodulation performance is achieved while still

maintaining very low-power operation.

The Si2165 guarantees a low-cost system implementation due to

its minimal BOM and very small package footprint.

Features

DVB-T (ETSI EN 300 744) demodulator & FEC decoder

ITU J.83 Annex A/C and DVB-C (EN 300 429) compliant

demodulator & FEC decoder

NorDig Unified 2.0, D-Book & C-Book 4.0 compliant

Suitable for low power design: 140 mW (typical, 36 MHz IF

sampling mode)

Dual 12-bit ADCs: accept 1

IF, low IF, or zero-IF inputs

DVB-T channel bandwidth: 5, 6, 7, 8 MHz

DVB-C symbol rate: 1 to 7.2 MBaud

DSP-based synchronization and control with embedded ROM

code avoids need for code download at startup

Supports patch code downloads for in-field upgradeability

Independent AGC controls (for IF & RF),



plus RSSI measurement

ACI filtering: fixed 8 MHz SAW filter even for 7 MHz channel

Advanced performance for SFN networks

Impulsive noise protection algorithm

Ultra fast automatic UHF/VHF band scanning (QuickScan)

Master TS output modes, parallel or serial

(with tri-state function)

embedded FIFO, providing a seamless interface to any USB

controller.

Slave TS parallel output: external device polls data from an

On-chip PID filtering to reduce TS output bit rate.

Up to six GPIOs

Two 5 V tolerant I

C control buses (host-side, tuner-side)



with on-chip I

C repeater

4, 16, 20, 24, or 27 MHz clock/crystal reference

3.3 and 1.2 V power supplies only

Very compact QFN-36, 5 x 6 mm, RoHS compliant package

Applications

Digital terrestrial and cable STB, NIM, and iDTV set

Personal Video Recorder (DVD or HDD-based)

Digital terrestrial and cable PC-TV tuner peripheral

1.2, 3.3 V

RF_AGC

IF_AGC

RSSI

ADC_IP

ADC_IN

ADC_QP

ADC_QN

4 MHz

TUN_SDA

TUN_SCL

Xtal: 16,20,

24,27 MHz

SWITCH

OSC

& PLL

RESETB

Dual

AGC

8-bit

ADC

12-bit

ADC

12-bit

ADC

Si2165

DSP

CTRL

I/F

GPIO

GPIO0..5

(Can or Silicon) TUNER

TS & GPIF INTERFACE

Shared

FRONT

END

DVB-T/C

DEMOD

EQUALI

ZER

FEC

PID

FILTER

µP

I/F

HOST_SDA

HOST_SCL

Digital TV Demodulator

MPEG ASSP

TS_SYNC

TS_VAL

TS_ERR

TS_CLK

TS_DATA

8.24.09

SI2165

SI2165概述

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