data brief for further information contact your local stmicroelectronics sales office. november 2011 doc id 022528 rev 1 1/4 4 STV6111 8psk/qpsk low-power 3.3-v satellite tuner ic features rf-to-baseband direct conversion architecture single 3.3-v dc supply, low consumption outstanding performance in heavily loaded spectrum conditions input frequency range: 950 to 2150 mhz supports 1 to 60 msymb/s using internal filter rf-agc or channel-agc support extremely low-phase noise, compliant with dvb-s2 requirements using fractional-n synthesizer low external component count flexible crystal frequency output to drive the demodulator and/or other tuner ics continuously variable gain programmable 6 to 50 mhz cut-off frequency (butterworth 5th-order baseband filters) specific operating mode for symbol rates up to 220 msymb/s compatible with 5-v and 3.3-v i 2 c bus applications direct broadcasting satellite (dbs), satellite modems: bpsk, qpsk, 8psk, 16/32 apsk modulations set-top boxes, pctv and idtv outdoor units package vfqfpn-32 5 x 5 x 1 mm 3 with exposed pad ecopack ? , rohs (2002/95/ec) compliant description the STV6111 satellite tuner is a direct-conversion (zero if) receiver for digital tv broadcasting. agc control rf receiver mixers lo dividers vco pll external filter i2c clock management xtal_out scl sda rf_inp agc qp rf_inn lna qn in ip dc offset correction vga1 vga1 vga1 vga2 vga2 www.st.com
introduction STV6111 2/4 doc id 022528 rev 1 1 introduction in the STV6111 satellite tuner, on the rf input, there is a vari able gain, low-noise amplifier (vglna). the rf gain is monitored by an automatic gain control (agc) circuit to ensure an optimal signal level for the two mixers. each mixer, which down-converts the signal to the baseband, is followed by an agc-controlle d vga, a low-pass filter and a second vga. the local oscillator signals ar e provided by an integrated fractional-n phase locked loop (pll), which contains an on-chi p voltage-controlled oscillator meeting st ringent phase noise requirements. the pll loop filter is partly in tegrated. the local osc illator frequencies are programmable between 950 mhz and 2150 mhz. the comparison frequency for the phase-frequency detector is generated by dividing the crystal oscillator reference frequency. the crystal frequency may be within the range 15 mhz to 31 mhz depending on the application. features benefits variable gain low noise amplifier input structure allows flexible compromise between linearity and noise figure allowing the most difficult signals to be extracted in the most congested and noisy conditions single flexible xtal wide choice of crystal frequencies with robust clock buffer to drive second tuners and demodulators allowing ebom savings fractional-n pll low phase noise for low packet error rate under extreme conditions (e.g. low symbol rates), fast locking high symbol rate support allows more efficient exploitation of ku (up to 60 msps) and ka band (up to ~220 msps) satellites
STV6111 ordering information doc id 022528 rev 1 3/4 2 ordering information 3 revision history table 1. device summary order code temperature range package packaging STV6111b -40 to 85 c vfqfpn-32 tray STV6111bt -40 to 85 c vfqfpn-32 tape and reel table 2. document revision history date revision changes 29-nov-2011 1 initial release.
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