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
VHF: 54 mA, UHF: 57 mA
Dynamic power control embedded
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
Functional Block Diagram for ADMTV803
