Hybrid TV Receiver Copyright © 2011 by Silicon Labora tories 09.06.11
Si2170/1/2 DSP
FILTER
ATV
DEMOD
I
ADC
Q
ADC
0 / 90 LOW-IF
RF_IN LNA
RF_IP
FREQ
SYNTH
RF
AGC
DC/DC
ANTENNA
INPUT
IF
AGC
VDD_L, VDD_D (1.8 V)
VDD_H, VDD_IO (3.3 V)
VDD_S (3.3 or 5 V) XOSC
XTAL_I
24 MHz
PGA
PGA
XTAL_O
XOUT
Si2185
Balun
A/V
SoC
DSP
TS_SYNC
TS_VAL
TS_ERR
TS_CLK
TS_DATA
[0..7]
CONTROL
INTERFACE
DIGITAL
I/Q
DIGITAL
FILTER
ATV DEMOD
OUTPUT
INTERFACE
DVB-T/C
DEMOD EQUAL-
IZER FEC
CVBS
SIF/AF
RSTB
SDA
SCL
ADDR
GPIO
8
BCLK
INTB
Si2185
Hybrid DVB-T/C and Analog TV Receiver
Description
The Si2185 hybrid TV receiver integrates a complete
hybrid tuner , a DVB-T/C digit al demodulator , and an analog
TV demodulator supporting all worldwide analog TV
standards into a single, monolithic, CMOS mixed-signal IC.
Leveraging Silicon Labs' proven 3rd-generation digital
low-IF tuner architecture, the Si2185 delivers superi or ATV
picture quality and a higher number of received channels in
real-world crowded spectrum conditions without the need
for external LNAs, tracking filters, or SAW filters.
An enhanced version of the proven DVB-T/C demodulator
technology from Silicon Labs' Si2165 has been
incorporated into the Si2185 to deliver superior
performance under a wide variety of field conditions. Both
the analog and digital demodulators use sophisticated
on-chip algorithms to ensure optimal recepti on even under
difficult transmission conditions. In addition, the Si2185
offers on-chip Blindscan and Blindlock scanning algorithms
for DVB-C as well as DSP-assisted DVB-T fast channel
scanning.
By combining hybrid tuner and demodulator functions in a
single device, the Si2185 enables a full TV receiver
solution in a very small PCB footprint and with minimal
external components. The Si2185 contains an on-chip
crystal oscillator and only requires the connection of a
standard 24 MHz crystal or a reference clock. For
dual-receiver applications, the primary Si2185 can provide
a reference clock on its XOUT pin directly to the XT AL_I pin
of the secondary Si2185, thus saving the cost of one
crystal. The Si2185 programmable Transport Stream
interface provides both serial and parallel modes and is
fully compatible with all MPEG decoders and conditional
access modules (CI/CI+) to support any customer
application.
Features
-Hybrid Analog and Digital TV tuner
-42–870 MHz frequency range
-No alignment, tuning or calibration
-Analog TV (ATV) demodulator
-PAL/SECAM, NTSC
-Digital TV (DTV) demodulator and FEC decoder
-DVB-T (ETSI EN 300 744)
-DVB-C (ETSI EN 300 429)
-ITU J.83 Annex A/C
-Supports all DVB-T modes
-Supports DVB-C symbol rates from 1 to 7.2 MBaud
-Advanced echo equalizer
-Best-in-class real-world reception
-Compliance with NorDig 2.1, D-Book, C-Book, EN55020
specifications
-Highly integrated, lowest BOM
-No SAW filters required
-Integrated LNAs and complete tra cki ng filters
-Customizable channel select filters
-Flexible output interface to AV processor
-CVBS + SIF/AF
-Serial or parallel TS output
-Single die in standard CMOS process
-3.3 and 1.8 V power supplies
-7x7 mm, 48-pin QFN package, RoHS compliant
Applications
-iDTV (Integrated Digital TV)
-Hybrid PVR and DVD recorder
-Hybrid full-NIM
-Hybrid portable TV
-Hybrid PC-TV card and USB dongle
-Hybrid terrestrial or cable STB
Hybrid TV Receiver Copyright © 2011 by Silicon Labora tories 09.06.11
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.
Si2185
Hybrid DVB-T/C and Analog TV Receiver
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 ATV Mode | DVB-T Mode 0.98 | 1.1 W
RF Input Frequency Range 42 to 870 MHz
Noise Figure1 Max gain 4.0 dB
Wideband IIP31 N±18,±36; max RF gain +18 dBm
Inband IIP31 N±1,±2; max RF gain –5 dBm
LO Phase Noise at 860 MHz 125 Hz | 250 Hz | 1 kHz | 10 kHz | 100 kHz –83 | –91 | –96 | –95 | –104 dBc/Hz
Integrated DSB: 125 Hz to 4 MHz 0.4 (–43) °rms (dBc)
Adjacent Channel Attenuation N±1; RF input1 to DLIF output 80 dB
ATV Sensitivity 30 dB video SNR; M/N | B/G, D/K | I | L/L’ –67.5 | –67 | –66 | –68 dBm
ATV Unweighted Video SNR +1 dBm input level; M/N | B/G, D/K | I | L/L’ 55.5 | 55 | 53.5 | 56.5 dB
DVB-T Sensitivity28K, 64-QAM, 2/3CR, Gaussian Channel –84 dBm
DVB-T Carrier to Noise Ratio2 8K, 64-QAM, 2/3CR, Gaussian Channel 17 dB
Notes:
1. Measured at the F-connector input of the Si2185 referenc e design and includes all front-end circuit losses.
2. Measured at Quasi Error Free conditions (BER = 2 x 10–4).
Selection Guide
Part # Description
Si2185 Hybrid Digital and Analog TV Receiver for DVB-T/C, PAL/SECAM, NTSC
Pin Ass ignments
Si2185
GND_PAD
QFN-48
7x7 mm
37
3 4 5 6
38
39
7 8
40
LIF_P
TS_CLK
TS_DATA0 / TS_SER
LIF_N
TS_DATA1
BCLK
VDD_L
CVBS
XOUT
VDD_H
3334 32 31
41
42
43
44
910
VDD_H
18
19
20
21
17
22
TS_DATA2
VDD_IO
GND
TS_DATA3
ADDR
SDA
SIF / AF
LIF_AGC
2930 28 27 2526
13
14
15
16
1 2
GND
RF_IN
GND
RF_SHLD
GPIO1
INTB
RF_IP
RF_SHLD
GND
VDD_H
GND
VDD_H
VDD_H
TS_DATA5
TS_DATA4
XTAL_O
11 12
GND
GND TS_DATA7
TS_DATA6
23
24
SCL
VDD_S
RSTB
VDD_IO
TS_ERR / GPIO2
TS_SYNC
TS_VAL
VDD_D
XTAL_I / RCLK
3536
45
46
47
48
7x7 mm QFN-48 Package Information
Symbol Min Nom Max Unit
A 0.80 0.85 0.90 mm
D, E 7.00 BSC mm
e 0.50 BSC mm
