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PDF ZL10353 Data sheet ( Hoja de datos )
| Número de pieza | ZL10353 | |
| Descripción | Fully Compliant NorDig Unified COFDM Digital Terrestrial TV (DTV) Demodulator | |
| Fabricantes | Zarlink Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZL10353 (archivo pdf) en la parte inferior de esta página. Total 25 Páginas | ||
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ZL10353
Fully Compliant NorDig Unified COFDM
Digital Terrestrial TV (DTV) Demodulator
Data Sheet
Features
• Compliant with ETSI 300 744 DVB-T, Unified
Nordig and DTG performance specifications
• High performance with fast fully blind acquisition
and tracking capability
• Low power consumption: less than 0.32 W, and
eco-friendly standby and sleep modes
• Digital filtering of adjacent channels
www.DataShee•t4US.cionmgle 8 MHz SAW filter for 6, 7 & 8 MHz OFDM
• Superior single frequency network performance
• Fast AGC to track out signal fades
• Good Doppler tracking capability
• Enhanced frequency capture range to include
triple offsets
• External 4 MHz clock or single low-cost
20.48 MHz crystal, tolerance up to +/-200 ppm
• Automatic mode (2K/8K), guard and spectral
inversion detection
• Very low driver software overhead due to on-chip
state-machine control
• Novel RF level detect facility via a separate ADC
• Pre and post Viterbi-decoder bit error rates, and
uncorrectable block count
June 2005
Ordering Information
ZL10353QCG
ZL10353QCG1
ZL10353QCF
ZL10353QCF1
64 Pin LQFP Trays, Bake & Drypack
64 Pin LQFP* Trays, Bake & Drypack
64 Pin LQFP Tape & Reel, Bake & Drypack
64 Pin LQFP* Tape & Reel,Bake & Drypack
*Pb Free Matte Tin
-10°C to +80°C
Applications
• Digital terrestrial set-top boxes
• Integrated digital televisions
• Personal video recorders
• PC-TV receivers
• Portable applications
Description
The ZL10353 is a superior fourth generation fully
compliant ETSI ETS300 744 COFDM demodulator that
exceeds, with margin, the performance requirements
of all known DVB-T digital terrestrial television
standards, including Unified Nordig and DTG.
Figure 1 - Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2005, Zarlink Semiconductor Inc. All Rights Reserved.
1 page  
ZL10353
Data Sheet
Function
CVdd
CVdd
CVdd
CVdd
CVdd
CVdd
DATA1
www.DataSheet4U.com
DATA2/GPP1
Pin Function Pin Function Pin
7 MDO6
57 SADD4/Dv2
12
19 MDO7
58 SLEEP
10
37 MICLK
63 SMTEST
44
39 MOCLK/DvClk 61 STATUS/Dv3/ 11
Dv1
59 MOSTRT
47 Vdd
2
64 MOVAL/DvVal 48 Vdd
13
5 OSCMODE 27 Vdd
33
36 PLLGND
22 Vdd
45
Table 2 - Pin Names - Alphabetical Order (continued)
Function
Vss
Vss
Vss
Vss
Vss
Vss
XTI
XTO
1.3 Pin Description
Pin
25
38
40
46
55
60
23
24
Pin No
MPEG Pins
47
48
49-53,
56-58
61
62
63
11
6
Control Pins
4
5
Name
Pin Description
I/O Type
V mA
MOSTRT
MOVAL (or DvVal-O)
MDO(0:4)/Dv(0:4)-O
MDO(5:7)
MOCLK (or DvClk-O)
BKERR
MICLK
STATUS (or Dv3/1)
IRQ (or Dv4/0)
MPEG packet start
MPEG/diversity data valid
MPEG/diversity data bus
MPEG/diversity clock out
Block error
MPEG clock in
Status output or diversity
data
Interrupt output or diversity
data
O 3.3
O 3.3
O CMOS Tristate 3.3
O 3.3
O 3.3
I 3.3
I/O CMOS 3.3
I/O Open drain
5
1
1
1
1
1
1
6
CLK1
DATA1
Serial clock
Serial data
I CMOS
I/O Open drain
5
56
5
Zarlink Semiconductor Inc.
5 Page 
ZL10353
Data Sheet
2.15 Viterbi Decoder
The Viterbi decoder accepts the soft decision data from the OFDM demodulator and outputs a decoded bit-stream.
The decoder does the de-puncturing of the input data for all code rates other than 1/2. It then evaluates the branch
metrics and passes these to a 64-state path-metric updating unit, which in turn outputs a 64-bit word to the survivor
memory. The Viterbi decoded bits are obtained by tracing back the survivor paths in this memory. A trace-back
depth of 128 is used to minimize any loss in performance, especially at high code rates.
The decoder re-encodes the decoded bits and compares these with received data (delayed) to compute bit errors
at its input, on the assumption that the Viterbi output BER is significantly lower than its input BER.
2.16 MPEG Frame Aligner
The Viterbi decoded bit stream is aligned into 204-byte frames. A robust synchronization algorithm is used to
www.DataSheeet4nUs.ucroemcorrect lock and to prevent loss of lock due to noise impulses.
2.17 De-interleaver
Errors at the Viterbi output occur in bursts and the function of the de-interleaver is to spread these errors over a
number of 204-byte frames to give the Reed-Solomon decoder a better chance of correcting these. The
de-interleaver is a memory unit which implements the inverse of the convolutional interleaving function introduced
by the transmitter.
2.18 Reed-Solomon Decoder
Every 188-byte transport packet is encoded by the transmitter into a 204-byte frame, using a truncated version of a
systematic (255,239) Reed-Solomon code. The corresponding (204,188) Reed-Solomon decoder is capable of
correcting up to eight byte errors in a 204-byte frame. It may also detect frames with more than eight byte errors.
In addition to efficiently performing this decoding function, the Reed-Solomon decoder in ZL10353 keeps a count of
the number of bit errors corrected over a programmable period and the number of uncorrectable blocks. This
information can be used to compute the post-Viterbi BER.
2.19 De-scrambler
The de-scrambler de-randomizes the Reed-Solomon decoded data by generating the exclusive-OR of this with a
pseudo-random bit sequence (PRBS). This outputs 188-byte MPEG transport packets. The TEI bit of the packet
header may be set if required to indicate uncorrectable packets.
2.20 MPEG Transport Interface
MPEG data can be output in parallel or serial mode. The output clock frequency is automatically chosen to present
the MPEG data as uniformly spaced as possible to the transport processor. This frequency depends on the guard
ratio, constellation, hierarchy and code rate. There is also an option for the data to be extracted from the ZL10353
with a clock provided by the user.
11
Zarlink Semiconductor Inc.
11 Page | ||
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