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