TDA8296HN/C1,557

TDA8296 Digital global standard low IF demodulator for analog TV and FM radio Rev. 1 3 March 2011 Product data sheet 1. General description The TDA8296 is an alignment-free digital multistandard vision and sound low IF signal PLL demodulator for positive and negative video modulation including AM and FM mono sound processing. It can be used in all countries worldwide for M/N, B/G/H, I, D/K, L and L-accent standard. CVBS and SSIF/mono audio are provided via two DACs. FM radio preprocessing is included for simple interfacing with demodulator/stereo decoder backends. The IC is especially suited for the application with the NXP Silicon Tuner TDA1827x. All the processing is done in the digital domain. 2 The chip has an easy programming mode to make the I C-bus protocol very simple. In principle, only one bit sets the proper standard with recommended content. However, if this is not suitable, free programming is always possible. Note: Register 06h has to be reprogrammed to new value C4h (see Section 9.2 and Section 9.3.1). 2. Features and benefits Digital IF demodulation for all analog TV standards worldwide (M/N, B/G/H, D/K, I, L and L-accent standard) Multistandard true synchronous demodulation with active carrier regeneration Alignment-free 16 MHz typical reference frequency input (from low IF tuner) or operating as crystal oscillator Internal PLL synthesizer which allows the use of a low-cost crystal (typically 16 MHz) Especially suited for the NXP Silicon Tuner TDA1827x No SAW filter needed Low application effort and external component count in combination with the TDA1827x Simple upgrade of TDA8295 possible 12-bit low power IF ADC on chip running with 54 MHz or 27 MHz Two 10-bit DACs on chip for CVBS and SSIF or audio 2 Easy programming for I C-bus 2 High flexibility due to various I C-bus programming registers 2 2 I C-bus interface and I C-bus feed-through for tuner programming 2 Four I C-bus addresses selectable via two external pinsTDA8296 NXP Semiconductors Digital global standard low IF demodulator for analog TV and FM radio 2 Gated IF AGC acting on black level by using H/V PLL or peak IF AGC (I C-bus selectable) Internal digital logarithmic IF AGC amplifier with up to 48 dB gain and 68 dB control range Peak search tuner IF AGC for optimal adaptive drive of the IF ADC Switchable IF PLL and IF AGC loop bandwidths Precise AFC and lock detector Accurate group delay equalization for all standards Very robust IF demodulator coping with adverse field conditions 2 Wide PLL pull-in range up to 1 660 kHz (I C-bus selectable) CVBS and SSIF or audio output with simple postfilter (capacitor only) CVBS gain levelling stage to provide nearly constant signal amplitude during over modulation Video equalizer with eight settings Nyquist filter in video baseband Excellent video S/N (typically 60 dB weighted) High selectivity video low-pass filter for all standards Low video into sound crosstalk SSIF AGC Sound performance comparable to QSS single reference concepts AM/FM mono sound demodulator Switchable de-emphasis Excellent FM sound Good AM sound High FM Deviation mode for China Preprocessing of FM radio (mono and stereo) with highly selective digital band-pass filter No ceramic filter or external components needed for FM radio FM radio available in mono Automatic or forced mute for mono sound Automatic or forced blank for video Mostly digital FIR filter implementation (NSC notches and video low-pass filters) Three GPIO pins Power-On Reset (POR) block for reliable power-up behavior Very low total power dissipation (typically 150 mW) No power sequence requirement Standby mode (typically 5 mW) 40-pin HVQFN package CMOS technology (0.090 m 1.2 V and 3.3 V) 3. Applications TV applications Recording PC TV applications TDA8296 All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 1 3 March 2011 2 of 87