88DE8020 Datasheet, PDF (1/2 Pages) –

Marvell 88DE8020/25 Hybrid Demodulators
Supports DVB-C/DVB-T/Analog-TV Standards
PRODUCT OVERVIEW
The Marvell^® 88DE8020 and 88DE8025 hybrid demodulators with integrated ClearRF^TM technology enable robust
TV reception under complex signal impairment conditions in terrestrial and cable networks. The demodulators
are compatible with typical low/high IF tuners and TV decoders. The 88DE8020 supports DVB-C/DVB-T/NTSC/
PAL/SECAM demodulation, while the 88DE8025 supports DVB-T/NTSC/PAL/SECAM demodulation. Both devices
can demodulate 2K and 8K COFDM modulated signals based on the ETSI specification (ETSI EN 300 744) and
QAM modulated signals based on the DVB-C specification (ETSI EN 300 429). They can also be programmed to
demodulate analog NTSC/PAL/SECAM TV inputs and output CVBS and Sound IF signals.
BLOCK DIAGRAM
To Crystal
IF
From Tuner
PLL
IF
ADC
Common
Front End
TWSI
Repeater
TWSI
Slave
DVB-C
Demodulator
(Not Available in DE8025)
DVB-T
Demodulator
NTSC/PAL/SECAM
Demodulator
Analog/DTV
Mode
Detection
Outer
De-Interleaving
RS
Decoding
MPEG
Formatter
Video
Processing
Audio
Processing
Video
DAC
Audio
DAC
MPEG2-TS
CVBS
SIF
To Tuner
To Host
Micro-Controller
Fig 1. Block Diagram of Marvell 88DE8020 and 88DE8025 Hybrid Demodulators
KEY FEATURES AND BENEFITS
FEATURES
BENEFITS
• Low profile single chip hybrid demodulator with option to use clock
from tuner source
• Pin-compatible with Marvell demodulators supporting other standards
• ClearRF technology provides robust performance exceeding standard
DVB-T requirements
• ClearRF technology provides excellent C/N performance in challenging
DVB-C 256QAM networks
• ClearRF technology provides good picture quality even for standard
analog signals
• Hybrid blind scan for simultaneous detection of analog and digital
signals from terrestrial and cable networks
• Enables slim TV chassis with lower bill of materials. No need for multiple
chips, SAW filters, crystals and passives
• Enables TV makers to develop single worldwide multiformat decoder
chassis with plug-and-play RF front-end
• Good reception in challenging field conditions including:
- Adjacent/co-channel interference from changing troposphere
conditions
- Dynamic echoes in Single Frequency Network (SFN) countries like
Germany/Spain
- Local noise from household appliances, light switches and ignition
systems
• Robust cable reception in DVB-C networks carrying High Definition (HD)
signals
• Sharp picture and tolerance to over-modulated signals
• Quick out-of-box TV setup for seamless analog, digital channel
reception