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ADMTV803: VHF/UHF Tuner IC fo

2009-09-21 08:16本站整理 佚名我要評(píng)論（0）我要收藏

ADMTV803:  VHF/UHF Tuner IC for Multi-Standard Digital TV 

Product Description

The ADMTV803/804 is a highly integrated CMOS zero-IF conversion tuner IC for multi-standard digital TV applications such as CMMB (UHF band), DTMB, DVB-H, DVB-T, DAB, T-DMB, ATSC-M/H and ISDB-T (full-seg, 3-seg and 1-seg). It has dual VHF and UHF RF frequency inputs. The building blocks include LNA, RFPGA, I/Q downconversion mixer, bandwidth adjustable low-pass filter, baseband PGA, fractional-N frequency synthesizer with fully integrated VCO and PLL loop filter.

The on-chip low phase noise VCO, along with the high resolution fractional-N frequency synthesizer makes in-band phase noise low enough for mobile TV applications.

The ADMTV803/804 consumes less than 5.5 mA for DVB-H mode at 10 % duty cycle.

Applications

  • CMMB (UHF band) /DTMB/DVB-H/DVB-T/DAB/T-DMB/ATSC-M/H/ ISDB-T (full-seg, 3-seg and 1-seg) mobile and portable TV receivers
  • VHF/UHF mobile and portable TV receivers

Features

  • Single-chip RFIC for multi-standard digital TV applications
  • VHF (54 MHz ~ 245 MH) and UHF (470 MHz ~ 862 MHz) for CMMB, DTMB, DVB-H, DVB-T, DAB, T-DMB, ISDB-T and ATSC-M/H
  • Zero-IF architecture
  • Low noise figure 3 dB
  • Typical AGC dynamic range: −102 dBm to +10 dBm
  • Low current consumption in continuous mode
    VHF: 54 mA, UHF: 57 mA
    Dynamic power control embedded
  • On-chip features include
    Fast switching fractional-N PLL
    Low phase noise and wide frequency range VCO
    Integrated PLL loop filter
    Bandwidth-adjustable low-pass filter
    Reference clock output for demodulators
  • See data sheet for additional features

    • Functional Block Diagram for ADMTV803

    ADMTV803 Diagram 

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