Description

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

demodulator ideally matching Skyworks’ Si2170/1/2 new hybrid

high-performance silicon tuner product family. The analog frontend

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 I2C

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 Skyworks' 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 I2C pass-through logic switch acts as an I2C repeater.

This provides a “quiet” I2C 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 1st 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)

- Slave TS parallel output: external device polls data from an

embedded FIFO, providing a seamless interface to any USB

controller.

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

- Up to six GPIOs

- Two 5 V tolerant I2C control buses (host-side, tuner-side)

with on-chip I2C 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