Worldwide TV Tuner Copyright © 2011 by Silicon Laboratories 9.20.11
Si2156
Worldwide High-Performance TV Tuner IC for Analog and Digital S tandards
Description
The Si2156 integrates a complete hybrid TV tuner
supporting all worldwide terrestrial and cable TV
standards. Leveraging Silicon Labs’ field proven
digital low-IF architecture, the Si2156 maintains the
unmatched performance and design simplicity of the
Si2153 while further reducing footprint size and bill of
materials cost. No external LNAs, tracking filters,
wirewound inductors, or SAW filters are used.
Compared with competing silicon tuners and discrete
MOPLL-based tuners, the Si2156 delivers superior
picture quality and a higher number of received
stations in crowded and near/far real-world reception
conditions. The high linearity and low noise RF
front-end d eliv er s su pe r ior blo ckin g p er fo rm a nc e a nd
higher sensitivity in the presence of strong undesired
channels and interference.
The Si2156 integrates the complete signal path from
antenna input to IF outputs for both analog and digital
transmission standards. Compared to traditional
discrete MOPLL-based tuners, the Si2156 eliminates
hundreds of external components including external
LNAs, tracking filter varactors and inductors (unlike
competing silicon tuners), and SAW filters, resulting in
the simplest, lowest-cost BOM for a hybrid TV tuner.
Interfacing the Si2156 seamlessly with the Si2165
DVB-T/C demodulator creates a complete terrestrial
and cable DVB-T/C receiver plus PAL/SECAM tuner.
Features
-Worldwide hybrid TV tune r
-Analog TV: NTSC, PAL/SECAM
-Digital TV: ATSC/QAM, DVB-T/T2/C, ISDB-T/C,
DTMB
-42-1002 MHz frequency range
-Compliance to A/74, NorDig, D-Book, C-Book,
ARIB, EN55020, OpenCable™ specificat ions
-Best-in-class real-world reception
-Exceeds discrete MOPLL-based tuners
-Highly integrated, lowest BOM
-No SAW filters or wirewound inductors required
-Integrated LNAs and complete tra cki ng filters
-No alignment, tuning or calibration required
-Digital low-IF architecture
-Integrated channel select filters
-Flexible output interface
-ALIF to analog TV demodulator or SoC
-DLIF to digital TV demodulator or SoC
-3.3 and 1.8 V power supplies
-Standard CMOS process technology
-5 x 5 mm, 32-pin QFN package
-RoHS compliant
Applications
-Hybrid ½-NIM
-iDTV (Integrated Digital TV)
-Digital terrestrial and cable STB
-Hybrid PVR and DVD recorder
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
BCLK
AGC
Si2156
RF_IN
RF_IP
ANTENNA
INPUT
Balun
DTV
DEMOD
AV
SoC
GPIO
RSTB
ADDR
SCL
SDA
INTB
DLIF
DSP
FILTER ATV
DEMOD
AGC
ALIF
3.3 V
1.8 V
Worldwide TV Tuner Copyright © 2011 by Silicon Laboratories 9.20.11
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.
Si2156
Worldwide High-Performance TV Tuner IC for Analog and Digital Standards
Selected Electrical Specifications
(VDD_H = 3.3 V, VDD_L = 1.8 V, VDD_D = 1.8 V, TA = 25 °C)
Parameter Test Co nd ition Typ Unit
Supply Voltage 1.8 and 3.3 V
Total Power Consumption VHF bands | UHF bands 0.98 | 0.87 W
RF Input Frequency Range 42 to 1002 MHz
Noise Figure* max gain 4.0 dB
Wideband IIP3* N±18,±36; max RF gain +18 dBm
Inband IIP3* N±1,±2; max RF gain –7 dBm
LO Phase Noise at 860 MHz 125 Hz | 250 Hz | 1 kHz | 10 kHz | 100 kHz –83 | –91 | –96 | –95 | –104 dBc/Hz
LO Integrated Phase Noise
at 860 MHz DSB: 125 Hz to 4 MHz 0.4
(–43) deg. rms
(dBc)
Adjacent Channel Attenuation N±1; RF input* to DLIF output 80 dB
DLIF Output Center Frequency channel BW = 6 MHz | 7 MHz | 8 MHz 4 to 7 | 4.5 to 6.5 | 5 to 6 MHz
DLIF Differential Output V olt age Swing programmable 0.5 to 2.0 Vppd
ALIF Output Center Frequency channel BW = 6 MHz | 7 MHz | 8 MHz 4 to 7 | 4.5 to 6.5 | 5 to 6 MHz
Analog IF Spurious Distortion S = P – 6 dB –78 dBc
ALIF Differential Output Voltage Swing programmable 0.5 to 2.0 Vppd
*Note: Measured at the F-connector input of the Si2156 reference design and includes all connector , PCB, and front-end
circuit losses.
Pin Assignments
GND_PAD
17
27
28
29
30
1819
31
32
20
RF_IN
XOUT
VDD_L
RF_SHLD
RF_SHLD
RF_IP
VDD_H
XTAL_I
16
15
21222324
BCLK
RSTB
6 7 85
DLIF_P
DLIF_N
ALIF_P
VDD_H
13
14
12
11
9
10
1234
25
26
GND
SDA
GND
VDD_D
SCL
VDD_S
VDD_IO
ALIF_AGC
ADDR
DLIF_AGC
ALIF_N
VDD_H
GPIO1
INTB/GPIO2
XTAL_O
GND
GND
GND
5 x 5 mm QFN-32 Package
Symbol Min Nom Max Unit
A 0.80 0.85 0.90 mm
D, E 5.00 BSC mm
e 0.50 BSC mm
Selection Guide
Part # Description
Si2156 Worldwide high performance TV tuner IC for analog and digital standards:
NTSC, PAL/SECAM, ATSC/QAM, DVB-T/T2/C, ISDB-T/C, DTMB
