TDA9874AH

Digital TV sound demodulator/decoder

GENERAL DESCRIPTION

The TDA9874A is a single-chip Digital TV Sound Demodulator/Decoder DTVSD for analog and digital multi-channel sound systems in TV/VCR sets and satellite receivers.

FEATURES

• Sound IF SIF input switch

• SIF AGC with 24 dB control range

• Switchable 10 dB SIF input attenuator

• SIF 8-bit Analog-to-Digital Converter ADC

• Easy TV standard programming option

• Differential Quadrature Phase Shift Keying DQPSK demodulation for different standards, simultaneously with 1-channel FM demodulation

• NICAM decoding B/G, D/K, I and L standard

• 2-carrier multi-standard FM demodulation B/G, D/K and M standard

• Single carrier high deviation FM mono demodulation mode

• Decoding for three analog multi-channel systems A2 and satellite sound

• Adaptive de-emphasis for satellite

• Programmable identification B/G, D/K and M standard and different identification times

• FM pilot carrier presence detector

• Optional AM demodulation for system L, simultaneously with NICAM

• Monitor selection for FM/AM demodulator outputs and FM and NICAM signals with peak option

• Automatic FM dematrixing option

• Digital crossbar switch

• I2S-bus serial audio output with matrix, level adjustment and mute

• Dual audio Digital-to-Analog Converter DAC from digital crossbar switch to analog crossbar switch, bandwidth = 15 kHz

• Automatic Volume Level AVL control

• Analog crossbar switch with inputs for mono and stereo

• Output selection of mono, stereo, dual, dual A or dual B

• Additional mono output with automatic select

• 20 kHz bandwidth for analog path

• Standby mode

• Automatic output selection for TV applications.