GENERAL DESCRIPTION
The TDA9870A is a single-chip Digital TV Sound Processor (DTVSP) for analog multi-channel sound systems in TV sets and satellite receivers.

FEATURES
1.1 Demodulator and decoder section
• Sound IF (SIF) input switch e.g. to select between terrestrial TV SIF and SAT SIF sources
• SIF AGC with 24 dB control range
• SIF 8-bit Analog-to-Digital Converter (ADC)
• Two-carrier multistandard FM demodulation (B/G, D/K and M standard)
• Decoding for three analog multi-channel systems (A2, A2+ and A2*) and satellite sound
• Programmable identification (B/G, D/K and M standard) and different identification times.
1.2 DSP section
• Digital crossbar switch for all digital signal sources and destinations
• Control of volume, balance, contour, bass, treble, pseudo stereo, spatial, bass boost and soft mute
• Plop-free volume control
• Automatic Volume Level (AVL) control
• Adaptive de-emphasis for satellite
• Programmable beeper
• Monitor selection for FM/AM DC values and signals, with peak detection option
• I2S-bus interface for a feature extension (e.g. Dolby surround) with matrix, level adjust and mute.
1.3 Analog audio section
• Analog crossbar switch with inputs for mono and stereo (also applicable as SCART 3 input), SCART 1 input/output, SCART 2 input/output and line output
• User defined full-level/−3 dB scaling for SCART outputs
• Output selection of mono, stereo, dual A/B, dual A or dual B
• 20 kHz bandwidth for SCART-to-SCART copies
• Standby mode with functionality for SCART copies
• Dual audio Digital-to-Analog Converter (DAC) from DSP to analog crossbar switch, bandwidth of 15 kHz
• Dual audio ADC from analog inputs to DSP
• Two dual audio DACs for loudspeaker (Main) and headphone (Auxiliary) outputs; also applicable for L, R, C and S in the Dolby Pro Logic mode with feature extension.