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參數(shù)資料
| 型號： | TDA10045H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | DVB-T channel receiver |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 X 2.80 MM, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大小： | 94K |
| 代理商： | TDA10045H |
2001 Nov 08
2
Philips Semiconductors
Product specification
DVB-T channel receiver
TDA10045H
FEATURES
2 and 8 kbytes Coded Orthogonal Frequency Division
Multiplexer (COFDM) demodulator (fully DVB-T
compliant: ETSI 300-744)
All modes supported, including hierarchical modes
Fully automatic transmission parameters detection
(including Fast Fourier Transformer (FFT) size and
guard interval)
Digital Signal Processor (DSP) based synchronization
(software can be upgraded on the fly)
No extra-host software required
On-chip 10-bit Analog-to-Digital Converter (ADC)
2nd or 1st IF variable analog input
Only fundamental crystal oscillator required (4 MHz
typical
±
100 ppm)
6, 7 and 8 MHz channels with the same crystal
Pulse killer algorithm to protect against impulse noise
Digital frequency correction (
±
90 kHz)
Frequency offset (
±
1
/
6
MHz) automatic estimator to
speed-up the scan
RF tuner input power measurement
Parallel or serial transport stream interface
BER measurement (before and after Viterbi decoder)
Signal-to noise ratio estimation
Constellation, CSI and channel frequency response
outputs
TPS bits I
2
C-bus readable (including spare ones)
Controllable dedicated I
2
C-bus for the tuner
(5 V tolerant)
3 low frequency spare DACs and 2 spare inputs
CMOS 0.2
μ
m technology.
APPLICATIONS
DVB-T fully compatible
Digital data transmission using COFDM modulation.
GENERAL DESCRIPTION
The TDA10045H is a single-chip channel receiver for
2 and 8 kbytes COFDM modulated signals based on the
ETSI specification (ETSI 300-744). The device interfaces
directly to an IF signal, which could be either 1st or 2nd IF
and integrates a 10-bit Analog-to-Digital Converter (ADC),
a Numerically Controlled Oscillator (NCO) and a
Phase-Locked Loop (PLL), simplifying external logic
requirements and limiting system costs.
The TDA10045H performs all the COFDM demodulation
tasks from IF signal to the MPEG-2 transport stream. An
internal DSP core manages the synchronization and the
control of the demodulation process, and implements
specially developed software for robustness against
co-channeland adjacent channel interference, to dealwith
Single Frequency Network (SFN) echo situations, and to
assist in a very fast scan of the bandwidth. After baseband
conversion and FFT demodulation, the channel frequency
response is estimated, which is based on the scattered
pilots, and filtered in both time and frequency domains.
This estimation is used as a correction on the signal,
carrier by carrier. A common phase error and estimator is
usedtodealwiththetunerphasenoise.TheForwardError
Correction (FEC) decoder is automatically synchronized
by the frame synchronization algorithm that uses the TPS
information included in the modulation. An embedded
‘pulse killer’ algorithm enables the bad effects of short and
strong impulsive noise interference that could be caused
by electrical domestic devices and/or car traffic to be
greatly reduced.
This device is controlled via an I
2
C-bus (master). The chip
provides 2 switchable I
2
C-buses derived from the master:
a tuner I
2
C-bus to be disconnected from the I
2
C-bus
master when not necessary and an EEPROM I
2
C-bus.
The DSP software code can be fed to the chip via the
master I
2
C-bus or via the dedicated EEPROM I
2
C-bus.
Designed in 0.2
μ
m CMOS technology and housed in a
100 pin QFP package, the TDA10045H operates over the
commercial temperature range.
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