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
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