digital terrestrial set top box tuner copyri ght ? 2015 by silicon laboratories 4.3.15 i adc q adc 0 / 90 low-if freq synth ldo output interface xosc xtal_i pga control interface xtal_o xout SI2124 antenna input gpio dsp filter agc dtv demod av soc addr scl sda lif if agc rf agc pga rf out zps loop through 3.3 v 1.8 v 1.8 v SI2124 digital terrestrial set-top box tuner description built upon six generations of field-proven tv tuner technology, the SI2124 is silicon labs? first digital set-top box (stb) tuner designed specific ally for digital terrestrial stb applications. like the prev ious generations of silicon labs' digital tv tuners, the SI2124 maintains very high linearity and low phase noise to deliver superior picture quality compared to competing silicon tuners. available in an industry-leading 3x3 mm qfn package, the SI2124 delivers the lowest-cost, most design-friendly and area-efficient digital terrestrial stb solution available today. a fully-integrated rf front-end eliminates the need for an external balun, lnas, saw filters, and inductive power supply filtering. also in cluded is a fully-integrated loop-through function with a zero-power mode switch (zps) for additional board area and bom savings. an on-chip 1.8 v ldo enables single-supply operation, while a dual-supply option offers add itional system flexibility. the SI2124?s excellent immunity to lte interference and harmonic rejection mixer with outstanding immunity to wi-fi interference eliminate th e need for external filtering. for advanced digital broadcast standards with high-order constellations, such as dvb-t2, the SI2124's superior integrated phase noise delivers industry-leading reception performance. the SI2124 delivers a higher number of received stations compared to other silicon tuners. incorporating worldwide field experience from prior gener ations of digital tuners in mass production, the SI2124 delivers the highest tolerance to real-world reception conditions. features - digital terrestrial stb tuner - atsc, dvb-t2/t, isdb-t - 1.7 mhz, 6 mhz, 7 mhz, 8 mhz, and 10 mhz chan- nel bandwidths - conforms to nordig, dtg, and arib - lowest bom for a digital terrestrial stb tuner - no balun, saw filters, or wire-wound inductors - integrated loop-through with zero-power mode - integrated lnas and complete tracking filters - best-in-class real-world reception - industry-leading phase noise performance - high immunity to wi-fi and lte interference - low power consumption - 3.3 v and 1.8 v power supplies - integrated 1.8 v ldo for 3.3 v single-supply operation - single low-if (lif) output to soc and/or demodulator - standard cmos process technology - smallest footprint for a silicon digital tv tuner - 3x3 mm, rohs-compliant 24-pin qfn applications - digital tuner modules - digital terrestrial stb - digital pvr, dvd and blu-ray disc recorder
digital terrestrial set top box tuner copyri ght ? 2015 by silicon laboratories 4.3.15 silicon laboratories and silicon labs are trademarks of silicon laboratories inc. other products or brandnames mentioned her ein are trademarks or registered tr ademarks of their respective holders SI2124 digital terrestrial set-top box tuner selected electrical specifications (v ddh = 3.3 v, v ddl = 1.8 v, t a = 25 c) parameter test condition typ unit supply voltage 1.8 and 3.3, or only 3.3 v total power consumption external 1.8 v supply, lt disabled 486 mw rf input frequency range 42 to 870 mhz nf, terrestrial mode vhf-l1 (42?106 mhz) 4.5 db vhf-l2 (107?247 mhz) 2.4 db vhf-h (248?470 mhz) 3.0 db uhf (471?870 mhz) 4.0 db lo phase noise at 860 mhz 1 khz | 10 khz | 100 khz | 1 mhz ?100 | ?100 | ?105 | ?132 dbc/hz lo integrated phase noise at 860 mhz dsb: 125 hz to 4 mhz 0.25 (?47) rms (dbc) lif output center frequency channel bw = 6 mhz | 7 mhz | 8 mhz 4 to 7 | 4.5 to 6.5 | 5 to 6 mhz lif differential output voltage programmable 0.5 to 2.0 v ppd loop through output rf frequency range (lt only) 42 to 870 mhz lt output return loss (active) 10 db lt noise figure (active) max gain 6.7 db lt gain active mode 2.2 db zero-power mode ?3.2 db *note: includes all connector, pcb and front-end circui t losses at the f-connector input of the SI2124 evb. selection guide part # description SI2124 digital terrestrial set top box tuner for atsc, dvb-t2/t, isdb-t pin assignments 1 2 7 8 9 10 11 12 13 20 19 18 gnd pad lif_p lif_n vddh gnd vddl xout xtal_i xtal_o gnd vddh vddh rf_ref rf_ip gnd rf_in rf_out addr gpio1 17 16 15 14 3 4 5 6 21 22 24 23 agc2 gnd scl sda gpio2 agc1 3x3 mm qfn-24 package information dimension min nom max unit a 0.80 0.85 0.90 mm d, e 3.00 bsc mm e 0.40 bsc mm e1 0.45 bsc mm j, k 1.60 1.70 1.80 mm
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