VESTEL MB185 IDTV, Service Manual

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2. T/T2/C/A TUNER (U107)
Description:
The Si2151 is Silicon Labs' sixth-generation hybrid TV tuner supporting all worldwide terrestrial and cable
TV standards. Requiring no external balun, SAW filters, wirewound inductors or LNAs, the Si2151 offers the
lowest-cost BOM for a hybrid TV tuner. Also included are an integrated power-on reset circuit and an option
for single power supply operation. As with prior-generation Silicon Labs TV tuners, the Si2151 maintains very
high linearity and low noise to deliver superior picture quality and a higher number of received stations when
compared to other silicon tuners. The Si2151 offers increased immunity to WiFi and LTE interference,
eliminating the need for external filtering. For the best performance with next-generation digital TV standards,
such as DVB-T2/C2, the Si2151 delivers industry-leading phase noise performance.
Features:

Worldwide hybrid TV tuner
o
Analog TV: NTSC, PAL/SECAM
o
Digital TV: ATSC/QAM, DVBT2/T/C2/C, ISDB-T/C, DTMB

1.7 MHz, 6 MHz, 7 MHz, 8 MHz, and 10 MHz channel bandwidths

42-1002 MHz frequency range

Industry-leading margin to A/74, NorDig, DTG, ARIB, EN55020, OpenCable™,DTMB

Lowest BOM for a hybrid TV tuner
o
No balun, SAW filters, or external inductors required
o
Increased ESD protection on 4pins

Best-in-class real-world reception
o
Lowest phase noise
o
High Wi-Fi and LTE immunity

Low power consumption
o
3.3 V and 1.8 V power supplies
o
Integrated 1.8 V LDO for 3.3 V singlesupply operation

Integrated power-on reset circuit

Standard CMOS process

3x3 mm, 24-pin QFN package

RoHS compliant
,
Figure 1: Si2151 Pin description