Si2165 Data Short

Si2165
Multi-Standard DVB-T and DVB-C Demodulator
Description
Features
The Si2165 is a compact standalone DVB-T/C digital TV
demodulator ideally matching Silicon Labs’ Si2170/1/2 new
hybrid high-performance silicon tuner product family. The analog
front-end consists of two ADCs with wide dynamic range (12-bit)
to allow operation with standard IF (~36 MHz), Low-IF, or Zero-IF
inputs. This enables the use of the Si2165 with any TV tuner,
either metal can or silicon tuner based.
The multi-standard demodulator supports all modes of DVB-T
(EN 300 744), including hierarchical modes. The Si2165 also
supports ITU J.83 annex A/C and DVB-C (EN 300 429),
including a user-configurable 31-tap equalizer. In addition to
DVB-T's legacy modes, the Si2165 also complies with DVB-H
(EN 300 744 Annex F) specificities: 4K FFT, extended TPS,
“native” and “in-depth” deinterleavers. The Si2165 is able to
receive DVB-H programs in fixed receiver applications (without
decoding the additional MPE FEC layer).
An embedded 32-bit DSP controls device operation.
Sophisticated on-chip algorithms ensure optimum reception
even under difficult channel conditions, such as echoes outside
the guard interval, pre-echoes, or strong impulse noise. For
ease-of-use, DSP firmware is preloaded into ROM (device is
immediately active at powerup). Nevertheless, there is a
possibility of downloading additional patch code via the I2C
interface (e.g., to adjust the demodulator to unexpected
conditions or reception impairments).
Thanks to proprietary features, the Si2165 supports ultra-fast
channel scanning for VHF/UHF terrestrial and cable DTV
channels. For supported tuners, the Quickscan algorithm for
blindscan is running onto the embedded DSP (in order to limit the
host CPU load) and is provided as a downloadable patch file.
Serial or parallel master MPEG TS output modes are supported.
Furthermore, a TS slave parallel mode is available via a GPIF port
and provides a glueless interface to Silicon Labs' MCU devices
with embedded USB interface. The user can optionally program a
32-PID hardware filter to reduce the output TS bit rate.
An internal I2C pass-through logic switch acts as an I2C repeater.
This provides a “quiet” I2C bus to the RF front end.
A maximum of six general-purpose inputs/outputs are available;
three GPIOs also feature / and interrupt output capabilities.
Best-in-class demodulation performance is achieved while still
maintaining very low-power operation.
The Si2165 guarantees a low-cost system implementation due to
its minimal BOM and very small package footprint.
- DVB-T (ETSI EN 300 744) demodulator & FEC decoder
- ITU J.83 Annex A/C and DVB-C (EN 300 429) compliant
demodulator & FEC decoder
- NorDig Unified 2.0, D-Book & C-Book 4.0 compliant
- Suitable for low power design: 140 mW (typical, 36 MHz IF
sampling mode)
-
Dual 12-bit ADCs: accept 1st IF, low IF, or zero-IF inputs
DVB-T channel bandwidth: 5, 6, 7, 8 MHz
DVB-C symbol rate: 1 to 7.2 MBaud
DSP-based synchronization and control with embedded ROM
code avoids need for code download at startup
- Supports patch code downloads for in-field upgradeability
- Independent AGC controls (for IF & RF), 
plus RSSI measurement
-
ACI filtering: fixed 8 MHz SAW filter even for 7 MHz channel
Advanced performance for SFN networks
Impulsive noise protection algorithm
Ultra fast automatic UHF/VHF band scanning (QuickScan)
Master TS output modes, parallel or serial
(with tri-state function)
- Slave TS parallel output: external device polls data from an
embedded FIFO, providing a seamless interface to any USB
controller.
- On-chip PID filtering to reduce TS output bit rate.
- Up to six GPIOs
- Two 5 V tolerant I2C control buses (host-side, tuner-side) 
with on-chip I2C repeater
- 4, 16, 20, 24, or 27 MHz clock/crystal reference
- 3.3 and 1.2 V power supplies only
- Very compact QFN-36, 5 x 6 mm, RoHS compliant package
Applications
- Digital terrestrial and cable STB, NIM, and iDTV set
- Personal Video Recorder (DVD or HDD-based)
- Digital terrestrial and cable PC-TV tuner peripheral
1.2, 3.3 V
RSSI
ADC_IP
ADC_IN
ADC_QP
ADC_QN
Si2165
CTRL
8-bit
ADC
DSP
TS
I/F
12-bit
ADC
12-bit
ADC
Shared
FRONT
END
DVB-T/C
DEMOD
EQUALI
ZER
FEC
PID
FILTER
4 MHz
or
TUN_SDA
TUN_SCL
Digital TV Demodulator
Dual
AGC
Xtal: 16,20,
24,27 MHz
I2C
SWITCH
OSC
& PLL
GPIO
GPIO0..5
TS_SYNC
TS_VAL
TS_ERR
TS_CLK
TS_DATA
8
MPEG ASSP
(Can or Silicon) TUNER
IF_AGC
TS & GPIF INTERFACE
RF_AGC
RESETB
µP
I/F
I2C
I/F
Copyright © 2009 by Silicon Laboratories
HOST_SDA
HOST_SCL
8.24.09
Si2165
Multi-Standard DVB-T and DVB-C Demodulator
Selected Electrical Specifications
Parameter
Min
Typ
Max
Unit
Ambient Temperature
0
25
85
°C
Power-up Time
—
—
10
ms
—
400
kHz
General
2
I C Speed (Host side)
<1
Input Clock or Supported Xtal Frequency
1
—
4 /16/20/24/27
—
MHz
1.14
1.20
1.26
V
VDD_VIO Supply
1.62
1.80 to 3.30
3.60
V
VDD_VADC Supply
1.14
1.20
1.26
V
VDDH_VANA Supply
3.00
3.30
3.60
V
—
1
—
Vpp
ZIF Mode Sampling Clock
18.5
48
60
MHz
IF Sub-sampling Mode Clock
18.5
27
32.5
MHz
IF Over-sampling Mode Clock
37
48
60
MHz
System Clock
—
—
85
MHz
—
—
65
MHz
DVB-T 8 MHz, IF Mode ([email protected] MHz), Parallel TS
—
140
—
mW
DVB-C, IF Mode, SR = 6.9 MBaud , 256 QAM
([email protected] MHz), Parallel TS
—
120
—
mW
Total Stand-by Power Consumption
—
13
—
mW
VDD_VCORE Supply
2
Input ADC (2 x 12-bits)
Input Differential Voltage Range
TS Output Rates
Serial Mode Clock (DVB-T or DVB-C Mode)
Power Consumption
Notes:
1. Clock only.
2. 5 V tolerant I2C bus requires VDD_VIO supply set @ 3.3 V.
TS_DATA[7]
5 x 6 mm SLP QFN-36 Package Information
GND
TS_ERR/GPIO_2
VDD_VCORE
RESETB
XTAL_I
XTAL_O
VDDH_VANA
ADDR
VDD_VADC
Pin Assignments
28 27 26 25 24 23 22 21 20 19
18 TS_DATA[6]
ADC_IP 29
17 TS_DATA[5]
ADC_IN 30
ADC_QP 31
16 TS_DATA[4]/GPIO_5
ADC_QN 32
15 VDD_VIO
GND
SDA_MAST 33
14 TS_DATA[3]/GPIO_4
SCL_MAST 34
13 TS_DATA[2]/GPIO_3
RSSI_ADC/CLK_OUT 35
12 TS_DATA[1]/GPIO_1
GPIO_0 36
2
3
4
5
6
7
8
9
10
GND
AGC_IF
AGC_RF
SCL_HOST
SDA_HOST
VDD_VCORE
TS_VAL/GPIF_CLK
TS_SYNC/GPIF_RDY
TS_CLK/GPIF_CTL
GND
11 TS_DATA[0]/TS_SER
1
Digital TV Demodulator
Copyright © 2009 by Silicon Laboratories
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
8.24.09