FEATURES

· 2K and 8K COFDM demodulator ( Fully

DVB-T compliant : ETS 300-744).

· All modes supported including

hierarchical modes.

· On chip 9-bit ADC.

· Digital down conversion.

· Fully automatic transmission parameters

detection.

· Crystal or VCXO clock generation.

· Frequency offset estimator to speed up

the scan.

· RF Tuner input power measurement

· On chip FEC decoder, full DVB-T

compliant.

· Parallel or serial transport stream

interface.

· DSP based synchronization.

· BER measurement

· SNR estimation

· Channel frequency response output.

· Channel impulse response output.

· Controllable dedicated I2C tuner bus.

· 2 low frequency spare DAC. (DS)

· Spare I/O.

· I2C bus interface, for easy control.

· CMOS 0.35mm technology.

APPLICATIONS

· DVB-T fully compatible.

· Digital data transmission using

COFDM modulations.

DESCRIPTION

The VES9600 is a single chip channel receiver for 2K and 8K

COFDM modulated signals based on the ETSI specification (ETSI

300 744). The device interfaces directly to an IF signal, which is

sampled by a 9-bit AD converter.

The VES9600 performs all the COFDM demodulation tasks from IF

signal to the MPEG2 transport stream. An internal DSP core

manages the synchronization and the control of the demodulation

process.

After base band conversion and FFT, the channel frequency

response is estimated 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 used to deal with the tuner phase noise.

The FEC decoder is automatically synchronized thanks to the frame

synchronization algorithm that uses the TPS information included in

the modulation. Finally descrambling according to DVB-T standard,

is achieved at the Reed Solomon output.

This device is controlled via an I2C bus. The chip provides a

switchable tuner I2C bus to be disconnected from the I2C master

when not necessary. The DSP software code can be fed to the

chip via the master I2C bus or via a dedicated I2C bus (Eeprom).

Designed in 0.35 mm CMOS technology and housed in a 208-pin

MQFP package, the VES9600 operates over the commercial

temperature range.