Si2156
Worldwide High-Performance TV Tuner IC for Analog and Digital Standards
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 delivers superior blocking performance and
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.
I
nterfacing 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 tuner
-
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™ specifications
-
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 tracking 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
RF_IP
Balun RF_IN
PGA
Q
ADC
OUTPUT
INTERFACE
ANTENNA
INPUT
Si2156
PGA
I
ADC
DSP
DSP
FILTER
ATV
FILTER
DEMOD
AGC
DLIF
AGC
ALIF
RSTB
INTB
SDA
SCL
ADDR
DTV
DEMOD
ATV
DEMOD
CONTROL
INTERFACE
RF
AGC
1.8 V
3.3 V
0 / 90
IF
AGC
LOW-IF
LDO
FREQ
SYNTH
AV
SoC
XOSC
XTAL_O
XTAL_I
XOUT
BCLK
GPIO
Worldwide TV Tuner
Copyright © 2011 by Silicon Laboratories
9.20.11
Si2156
Worldwide High-Performance TV Tuner IC for Analog and Digital Standards
Selected Electrical Specifications
(V
DD_H
= 3.3 V, V
DD_L
= 1.8 V, V
DD_D
= 1.8 V, T
A
= 25 °C)
Parameter
Supply Voltage
Total Power Consumption
RF Input Frequency Range
Noise Figure*
Wideband IIP3*
Inband IIP3*
LO Phase Noise at 860 MHz
LO Integrated Phase Noise
at 860 MHz
Adjacent Channel Attenuation
DLIF Output Center Frequency
DLIF Differential Output Voltage Swing
ALIF Output Center Frequency
Analog IF Spurious Distortion
ALIF Differential Output Voltage Swing
max gain
N±18,±36; max RF gain
N±1,±2; max RF gain
VHF bands | UHF bands
Test Condition
Typ
1.8 and 3.3
0.98 | 0.87
42 to 1002
4.0
+18
–7
Unit
V
W
MHz
dB
dBm
dBm
125 Hz | 250 Hz | 1 kHz | 10 kHz | 100 kHz –83 | –91 | –96 | –95 | –104 dBc/Hz
DSB: 125 Hz to 4 MHz
N±1; RF input* to DLIF output
channel BW = 6 MHz | 7 MHz | 8 MHz
programmable
channel BW = 6 MHz | 7 MHz | 8 MHz
S = P – 6 dB
programmable
0.4
(–43)
80
4 to 7 | 4.5 to 6.5 | 5 to 6
0.5 to 2.0
4 to 7 | 4.5 to 6.5 | 5 to 6
–78
0.5 to 2.0
deg. rms
(dBc)
dB
MHz
V
ppd
MHz
dBc
V
ppd
*Note:
Measured at the F-connector input of the Si2156 reference design and includes all connector, PCB, and front-end
circuit losses.
Pin Assignments
RF_SHLD
RF_SHLD
XTAL_O
XTAL_I
VDD_H
VDD_H
RF_IN
RF_IP
5 x 5 mm QFN-32 Package
24
GND 25
GND 26
GND 27
GPIO1 28
INTB/GPIO2 29
RSTB 30
GND 31
VDD_IO 32
1
VDD_S
23
22
21
20
19
18
17
16 XOUT
15 BCLK
14 VDD_L
GND_PAD
13 DLIF_P
12 DLIF_N
11 ALIF_P
10 VDD_H
9
ALIF_N
Symbol
A
D, E
e
Min
0.80
Nom
Max
Unit
mm
mm
mm
2
SCL
3
SDA
4
VDD_D
5
GND
6
ADDR
7
ALIF_AGC
8
DLIF_AGC
0.85
0.90
5.00 BSC
0.50 BSC
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
Copyright © 2011 by Silicon Laboratories
9.20.11
Worldwide TV Tuner
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.
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