Si2173
Worldwide Hybrid TV Tuner with Analog Demodulator
Description
The Si2173 integrates a complete hybrid tuner with
analog TV demodulator supporting all worldwide
terrestrial and cable TV standards. Leveraging
Silicon Labs’ proven digital low-IF architecture, the
Si2173 extends the unmatched performance and
design simplicity of the original Si2170/1/2 while
further reducing footprint size. No external LNAs,
tracking filters, or SAW filters are used.
Compared with competing silicon tuners and discrete
MOPLL-based tuners, the Si2173 delivers superior
picture quality and a higher number of received
stations in crowded and near/far real-world reception
conditions. This unprecedented level of performance
in the field is enabled by a novel front-end
architecture which uniquely combines very high
linearity and low noise, delivering superior blocking
performance and higher sensitivity in the presence of
strong undesired channels and interference.
The Si2173 integrates the complete signal path from
antenna input to IF or analog video and sound
outputs.
Compared
to
traditional
discrete
MOPLL-based tuners, the Si2173 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
while improving performance.
I
nterfacing the Si2173 seamlessly with the Si2165
DVB-T/C demodulator creates a complete terrestrial
and cable hybrid PAL/SECAM and DVB-T/C receiver.
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 required
-
Integrated LNAs and complete tracking filters
-
No alignment, tuning or calibration required
-
Digital low-IF architecture
-
Integrated channel select filters
-
Analog TV demodulator
-
Superior video SNR performance
-
Customizable video filters
-
Overmodulation and ICPM tolerant
-
Flexible output interface
-
CVBS + SIF/AF to audio/video processor or SoC
-
DLIF to digital TV demodulator or SoC
-
3.3 and 1.8 V power supplies
-
Standard CMOS process technology
-
6 x 6 mm, 40-pin QFN package
-
RoHS compliant
Applications
-
-
-
-
Hybrid ½-NIM, ¾-NIM and full-NIM
iDTV (Integrated Digital TV)
Digital terrestrial and cable STB
Hybrid PVR and DVD recorder
RF_IP
Balun RF_IN
PGA
Q
ADC
FILTER
FILTER
ATV
DEMOD
OUTPUT
INTERFACE
ANTENNA
INPUT
Si2173
PGA
I
ADC
DSP
DSP
AGC
DLIF
CVBS
SIF/AF
RSTB
INTB
SDA
SCL
ADDR
DTV
DEMOD
1.8 V
3.3 V
LDO
FREQ
SYNTH
XOSC
Worldwide Hybrid TV Tuner
Copyright © 2011 by Silicon Laboratories
CONTROL
INTERFACE
RF
AGC
0 / 90
IF
AGC
LOW-IF
AV
SoC
XTAL_O
XTAL_I
XOUT
BCLK
GPIO
8.19.11
2
Si2173
Worldwide Hybrid TV Tuner with Analog Demodulator
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
ATV Receiver Sensitivity
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
1.04 | 0.94
42 to 1002
4.0
+23
–5
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
30 dB video SNR; M/N | B/G, D/K | I | L/L’
0.4
(–43)
80
–67.5 | –67 | –66 | –68
54 | 53.5 | 52.5 | 55
4 to 7 | 4.5 to 6.5 | 5 to 6
0.5 to 2.0
deg. rms
(dBc)
dB
dBm
dB
MHz
V
ppd
ATV Receiver Unweighted Video SNR +1 dBm input level; M/N | B/G, D/K | I | L/L’
DLIF Output Center Frequency
DLIF Differential Output Voltage Swing
channel BW = 6 MHz | 7 MHz | 8 MHz
programmable
*Note:
Measured at the F-connector input of the Si2173 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
30
GND 31
GND 32
GND 33
GND 34
GND 35
GND 36
GND 37
GND 38
GND 39
GND 40
1
GPIO1
2
GPIO2
3
INTB
4
ALIF_AGC
5
DLIF_AGC
6
VDD_IO
7
GND
8
VDD_S
9
SIF/AF
10
CVBS
29
28
27
26
GND
25
24
23
22
XOUT
21
20 VDD_L
19 VDD_H
18 DLIF_P
17 DLIF_N
6 x 6 mm QFN-40 Package
GND_PAD
16 SDA
15 SCL
14 BCLK
13 ADDR
12 RSTB
11 VDD_D
Symbol
A
D, E
e
Min
0.80
Nom
Max
Unit
mm
mm
mm
0.85
0.90
6.00 BSC
0.50 BSC
Selection Guide
Part #
Description
Si2173
Worldwide hybrid TV tuner with analog demodulator for NTSC, PAL/SECAM, ATSC/QAM,
DVB-T/T2/C, ISDB-T/C, DTMB
Worldwide Hybrid TV Tuner
Copyright © 2011 by Silicon Laboratories
8.19.11
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.
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