Si2176
Worldwide Hybrid TV Tuner IC with Analog Demodulator
Description
The Si2176 integrates a complete hybrid tuner with
analog TV demodulator supporting all worldwide
terrestrial and cable TV standards. Leveraging
Silicon Labs’ field proven digital low-IF architecture,
the Si2176 maintains the unmatched performance
and design simplicity of the Si2173 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 Si2176 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 Si2176 integrates the complete signal path from
antenna input to IF incorporating Silicon Labs' third
generation field-proven analog demodulator to
provide analog video and sound outputs. Compared
to traditional discrete MOPLL-based tuners, the
Si2176 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 Si2176 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 or wirewound inductors 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
-
Overmodulation and ICPM tolerant
-
Customizable ATV and DTV channel filters
-
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
-
5 x 5 mm, 32-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
LOW-IF
OUTPUT
INTERFACE
ANTENNA
INPUT
Si2176
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
AV
SoC
XTAL_O
XTAL_I
XOUT
BCLK
GPIO
9.20.11
Si2176
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
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
30 dB video SNR; M/N | B/G, D/K | I | L/L’
0.4
(–43)
80
–67.5 | –67 | –66 | –68
55.5 | 55 | 53.5 | 56.5
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 Si2176 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 CVBS
10 VDD_H
9
SIF/AF
2
SCL
3
SDA
4
VDD_D
5
GND
6
ADDR
7
NC
8
DLIF_AGC
Symbol
A
D, E
e
Min
0.80
Nom
Max
Unit
mm
mm
mm
0.85
0.90
5.00 BSC
0.50 BSC
Selection Guide
Part #
Description
Si2176
Worldwide hybrid TV tuner IC 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
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.
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