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TDA9874A Dataheets PDF



Part Number TDA9874A
Manufacturers NXP
Logo NXP
Description Digital TV sound demodulator/decoder
Datasheet TDA9874A DatasheetTDA9874A Datasheet (PDF)

INTEGRATED CIRCUITS DATA SHEET TDA9874A Digital TV sound demodulator/decoder Preliminary specification File under Integrated Circuits, IC02 1999 Dec 03 Philips Semiconductors Preliminary specification Digital TV sound demodulator/decoder CONTENTS 1 2 2.1 3 4 5 6 6.1 6.2 6.3 7 8 9 10 10.1 10.2 10.3 10.4 11 12 13 14 14.1 14.2 14.3 14.4 15 16 17 FEATURES GENERAL DESCRIPTION Supported standards ORDERING INFORMATION BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTION Description of the demodulator and de.

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INTEGRATED CIRCUITS DATA SHEET TDA9874A Digital TV sound demodulator/decoder Preliminary specification File under Integrated Circuits, IC02 1999 Dec 03 Philips Semiconductors Preliminary specification Digital TV sound demodulator/decoder CONTENTS 1 2 2.1 3 4 5 6 6.1 6.2 6.3 7 8 9 10 10.1 10.2 10.3 10.4 11 12 13 14 14.1 14.2 14.3 14.4 15 16 17 FEATURES GENERAL DESCRIPTION Supported standards ORDERING INFORMATION BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTION Description of the demodulator and decoder section Description of the DSP Description of the analog audio section LIMITING VALUES THERMAL CHARACTERISTICS CHARACTERISTICS I2C-BUS CONTROL Introduction Power-up state Slave receiver mode Slave transmitter mode I2S-BUS DESCRIPTION EXTERNAL COMPONENTS PACKAGE OUTLINES SOLDERING Introduction Through-hole mount packages Surface mount packages Suitability of IC packages for wave, reflow and dipping soldering methods DEFINITIONS LIFE SUPPORT APPLICATIONS PURCHASE OF PHILIPS I2C COMPONENTS TDA9874A 1999 Dec 03 2 Philips Semiconductors Preliminary specification Digital TV sound demodulator/decoder 1 FEATURES TDA9874A • 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. 2 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. 2.1 Supported standards The multi-standard/multi-stereo capability of the TDA9874A is of interest in Europe, Hong Kong/PR China and South East Asia. This includes B/G, D/K, I, M and L standard. In other application areas subsets of the standard combinations are available or, only single standards are transmitted. All A2 (analog 2-carrier) and NICAM systems are supported. M standard (with mono or BTSC stereo sound) can be received and processed in mono sound mode. The AM sound of L/L’ standard is normally demodulated in the 1st sound IF. The resulting AF signal has to be entered into the mono audio input of the TDA9874A. A second possibility is to use the internal AM demodulator stage (with 6.5 MHz intercarrier), which gives limited performance. Korea has a stereo sound system similar to Europe and is supported by the TDA9874A. The differences include deviation, modulation contents and identification. It is based on M standard. For all FM standards a high deviation mode for a single carrier monaural sound demodulation is selectable. An overview of the supported standards and sound systems and their key parameters is given in Tables 1 to 3. The analog multi-channel systems are sometimes also called 2CS (2-carrier systems). 1999 Dec 03 3 Philips Semiconductors Preliminary specification Digital TV sound demodulator/decoder 2.1.1 Table 1 ANALOG 2-CARRIER SYSTEMS Frequency modulation SOUND SYSTEM mono A2 A2 mono A2 A2 A2 CARRIER FREQUENCY (MHz) 4.5 4.5/4.724 5.5/5.742 6.0 6.5/6.742 6.5/6.258 6.5/5.742 FM DEVIATION (kHz) NOM. 15 15 27 27 27 27 27 MAX. 25 25 50 50 50 50 50 OVER. 50 50 80 80 80 80 80 1⁄ 1⁄ 1⁄ 1⁄ 1⁄ TDA9874A MODULATION SC1 mono 2(L + R) 2(L 1⁄ STANDARD M M B/G I D/K (2) D/K (1) D/K (3) Table 2 SC2 − 2(L − R) BANDWIDTH/ DE-EMPHASIS (kHz/µs) 15/75 15/75 (Korea) 15/50 15/50 15/50 15/50 15/50 + R) R − R R R mono 2(L + R) 2(L 2(L + R) + R) Identification for A2 systems PARAMETER A2; A2* 54.6875 kHz = 3.5 × line frequency line frequency 117.5 Hz = -------------------------------------133 line frequency 274.1 Hz = -------------------------------------57 50% A2+ (KOREA) 55.0699 kHz = 3.5 × line frequency line frequency 149.9 Hz = -------------------------------------105 line.


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