Hybrid TV Tuner Copyright © 2012 by Silicon Laboratories 12.19.12
DSP
FILTER
ATV
DEMOD
I
ADC
Q
ADC
0 / 90 LOW-IF
FREQ
SYNTH
RF
AGC
LDO
IF
AGC
OUTPUT
INTERFACE
XOSC
XTAL_I
PGA
PGA
CONTROL
INTERFACE
XTAL_O
XOUT
Si2157
ANTENNA
INPUT
GPIO
3.3 V
1.8 V
DSP
FILTER
AGC
DTV
DEMOD
AV
SoC
RSTB
ADDR
SCL
SDA
DLIF
ATV
DEMOD
AGC
ALIF
Si2157
Worldwide Digital and Analog TV Tuner
Description
A universal hybrid TV tuner, the Si2157 supports
digital and analog reception for all worldwide
terrestrial and cable TV standards. By combining
Silicon Laboratories’ proven digital low-IF
architecture with a 5
th
-generation RF front-end, the
Si2157 maintains the highest performance that
exceeds that of MOPLL-based tuners, including
industry-leading 2
nd
order distortion performance.
Pin- and API-compatibility to the previous generation
minimize customers’ development effort.
The Si2157 delivers unprecedented integration with
no external balun, tracking filters, LNAs, SAW filters,
or inductive power supply filtering. While other
solutions may also eliminate the balun, they suffer
degradation in NF and 2
nd
order distortion
compromising reception. Silicon Laboratories’
proprietary and field-proven architecture delivers not
only an optimized BOM but also world-class system
performance. Options for single or dual supply and
internal power-on reset are included. A harmonic
rejection mixer delivers outstanding immunity to
Wi-Fi and LTE interference, replacing the need for
external filtering.
For advanced digital terrestrial TV reception, DVB-T2
and DVB-C2 constellations demand outstanding
phase noise specifications, and the Si2157 rises to
the challenge, delivering industry-leading integrated
phase noise. Additionally, a software-selectable
cable mode offers optimized return loss.
The Si2157 delivers exceptional picture quality and a
higher number of received stations when compared
to other solutions. Incorporating worldwide field
experience from four prior tuner generations in mass
production, the Si2157 delivers the highest tolerance
to real-world reception conditions.
Features
- Worldwide hybrid TV tuner
- Analog TV: NTSC, PAL/SECAM
- Digital TV: ATSC/QAM, DVB-T2/T/C2/C, ISDB-T/C,
DTMB
- Industry-leading margin to A/74, NorDig, D-Book,
C-Book, ARIB, EN55020, OpenCable™ specifications
- Lowest BOM for a silicon hybrid TV tuner
- No balun
- No SAW filters or wire-wound inductors
- Integrated LNAs and complete tracking filters
- Best-in-class real-world reception
- Exceeds discrete MOPLL-based tuners
- 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
- Single-supply option for 3.3 V-only operation
- Integrated power-on reset circuit
- Flexible output interface
- Combined ALIF/DLIF output to SoC
- Optional DLIF output to external demodulator
- Standard CMOS process technology
- 4x4 mm, 28-pin QFN package
- RoHS compliant
Applications
- Hybrid ½-NIM tuner module
- iDTV (Integrated Digital TV)
- Hybrid terrestrial and cable STB
- Hybrid PVR, DVD and Blu-Ray disc recorder
- PC-TV accessories
