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.

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 I2C-bus readable (including spare ones)

• Controllable dedicated I2C-bus for the tuner (5 V tolerant)

• 3 low frequency spare DACs and 2 spare inputs

• CMOS 0.2 µm technology.

APPLICATIONS

• DVB-T fully compatible

• Digital data transmission using COFDM modulation.