Worldwide Hybrid TV Tuner Copyright © 2011 by Silicon Laboratories 9.20.11
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 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 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 silic on tuners), and SAW
filters, resulting in the simplest, lowest-cost BOM for a
hybrid TV tuner.
Interfacing 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 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
-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
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
CVBS
SIF/AF
AGC
Si2176 DSP
FILTER
ATV
DEMOD
RF_IN
RF_IP
ANTENNA
INPUT
Balun
DTV
DEMOD
AV
SoC
GPIO
3.3 V
1.8 V
RSTB
ADDR
SCL
SDA
INTB
DLIF
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.
Si2176
Worldwide Hybrid TV Tuner with Analog Demodulator
Selected Electrical Specifications
(VDD_H = 3.3 V, VDD_L = 1.8 V, VDD_D = 1.8 V, TA = 25 °C)
Parameter Test Condition 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
ATV Receiver Sensitivity 30 dB video SNR; M/N | B/G, D/K | I | L/L’ –67.5 | –67 | –66 | –68 dBm
ATV Receiver Unweighted Video SNR +1 dBm input level; M/N | B/G, D/K | I | L/L’ 55.5 | 55 | 53.5 | 56.5 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 Voltage Swing programmable 0.5 to 2.0 Vppd
*Note: Measured at the F-connector input of the Si2176 reference design and includes all connector, PCB, and front-end
circuit losses.
Pin Assignments
VDD_D
SCL
DLIF_AGC
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
CVBS
VDD_H
13
14
12
11
9
10
1 2 3 4
25
26
GND
SDA
GND
VDD_S
VDD_IO
NC
ADDR
SIF/AF
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
Si2176 Worldwide hybrid TV tuner IC with analog demodulator for NTSC, PAL/SECAM, AT SC/ QAM,
DVB-T/T2/C, ISDB-T/C, DTMB
