DMB-TH Demodulator

The LGS-8913 is a single chip DMB-TH (Digital Multimedia/TV Broadcasting - Terrestrial / Handheld) demodulator. It uses TDS-OFDM (Time Domain Synchronous - Orthogonal Frequency Division Multiplexing) technology, which is the foundation on which the China Digital Television Terrestrial Broadcasting System Standard (GB20600-2006) is based. Designed for digital terrestrial reception of high definition, standard definition and other multimedia-based services, the demodulator is intended for indoor, outdoor, fixed, and automotive applications. The LGS-8913 is designed for integrated digital televisions (iDTVs), set-top boxes, and automobile receivers.

The chip demodulates a digitized input from a Terrestrial TV tuner and ADC(s) and provides the selected channel content as a MPEG-2 transport stream (TS) in parallel or serial format.

 

■ Basic Characteristics
  —— Package: 128LQFP, 14x20x1.4 mm
  —— Temperature range: -40℃ ~ +70℃
  —— Power supply: 1.8V / 3.3V
  —— Process: 0.18μm CMOS
  —— Power consumption: ~ 800 mW

■ Applications
  —— Integrated Digital TVs
  —— Set-top-boxes
  —— Automobile receivers

■ Development Support
  —— Complete datasheet
  —— Schematics
  —— Evaluation board
  —— Evaluation software and documentation

Product Features
■ DMB-TH demodulator
■ Modulation modes
      —— QPSK(4QAM),16QAM, 64QAM
■ Forward Error Correction (FEC) rates
      —— 0.4, 0.6, and 0.8
■ Time de-interleaving modes
   —— M=240 or M=720
■ Guard interval options
      —— PN420 and PN945
■ Automatic parameters discovery and update
■ RF signal input format
      —— Digital Intermediate Frequency (IF) or Baseband (IQ) input
■ Data output format
      —— Compliant with MPEG-2 TS Synchronous Parallel Interface (SPI) specifications
      —— Synchronous serial and synchronous parallel output mode
■ Automatic recovery functions
      —— Lost signal re-acquisition without external programming
      —— Active impulse noise rejection
      —— Fast acquisition time
■ Power consumption
      —— Less than 800mW in normal operation mode
■ Excellent multipath channel performance
■ Excellent Single Frequency Network (SFN) performance
■ Optimized for the best performance in all conditions
      ——  impulse noise, echoes, and fading
■ Complies with RoHS requirements (Pb-free, Green)

Simplified Hardware Design
■ Support for digital IF and baseband IQ signal input from tuners and ADC(s)
■ Standard I²C bus control for the system and demodulator
■ MPEG-TS interface to connect with MPEG decoder chips