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| PRODUCT INFORMATION DRX 396xA June/2005 DRX 396xA Analog TV IF Demodulator The DSP-based analog TV IF demodulator DRX 396xA performs the entire multistandard TV IF processing, AGC, video demodulation, and generation of the sound IF (SIF), requiring only one SAW filter. The IC is designed for applications, such as TV sets, DVD recorders, PC cards, and TV tuners. The alignment-free DRX 396xA does not need special external components. All control functions and status registers are accessible via I2C bus interface. Therefore, it simplifies the design of high-quality, highly standardized IF stages. Due to its mixed-signal structure and the digital demodulation, the IC offers unique features and can easily be combined with digital TV applications. Thus, the DRX 396xA enables an economic hybrid solution for the reception of either analog or digital TV channels which requires only one tuner and one single SAW filter. Features Multistandard QSS IF processing with a single SAW filter Programmable IF frequency between 30 and 60 MHz DSP-based IF processing for the following standards: B/G, D/K, I, L/L', and M/N Standard specific digital signal processing for: - Channel filtering - Audio/video splitting - Group delay equalization (programmable) - Video AGC and delayed tuner AGC Digital picture carrier recovery: - Field proven - Alignment-free - Stable frequency lock at overmodulation up to 150% - Quartz-accurate AFC information - Selectable bandwidth for different field conditions Automatically frequency-adjusted Nyquist slope, providing optimum picture and sound performance over complete lock-in frequency range, which eliminates the need of fine tuning Fast AGC algorithms for tuner, video, and SIF outputs - Field proven - Adaptive back porch control for positive modulation (L/L') - Programmable tuner take-over point (TOP) No sound traps required for video output FM radio capability without external components and with standard TV tuner Allows economic, single-tuner / singleSAW hybrid TV solution (DVB-C, DVB-T, ATSC) I2C bus interface PMQFP44-1 or PQFN64-1 package PRODUCT INFORMATION DRX 396xA System Architecture The first block of the DRX 396xA is a lownoise preamplifier. It has an adjustable gain for setting the Tuner Take-over Point voltage (TOP). This adjustment enables optimal tuner operation. Tuner 8-MHz SAW June/2005 MicModule D * DRX 397xD SDRAM Flash TS MDE 9518D AGC IF UART Speaker The down-converted and filtered analog IF signal is digitized for further digital signal processing. A digital PLL performs the tracking of the picture carrier and therefore synchronous demodulation. Channel filtering is performed internally by digital filters. They also separate the video and sound components of the desired channel. The processing is competitive to conventional QSS systems. The video AGC controls the CVBS amplitude. In positive modulation mode, an adaptive back porch control (BPC) is activated. The SIF AGC controls the level of the sound carrier output. fref SIF DRX DRX 396xA 396xA CVBS VCT 6wxyP LVDS VGA - WXGA LCD Panel *optional Fig. 1: Application example: analog/hybrid flat-panel TV with the DRX 396xA A Micronas video/audio processor (e.g. VCT 6wxyP, VPX 322xF, AVF 49xyA, and MSP 44xyG) can be connected to the CVBS and/or SIF output. Due to the internal filtering, no video or sound traps are needed. IF In TOP DSP Clock Generation D TAGC Tuner AGC A EQU Carrier Recovery A D Filtering VAGC D A D A CVBS SAGC SIF I2 C Fig. 2: Block diagram of the DRX 396xA All information and data contained in this product information are without any commitment, are not to be considered as an offer for conclusion of a contract, nor shall they be construed as to create any liability. Product or development sample availability and delivery are exclusively subject to our respective order confirmation form. By this publication, Micronas GmbH does not assume responsibility for patent infringements or other rights of third parties which may result from its use. No part of this publication may be reproduced, photocopied, stored on a retrieval system, or transmitted without the express written consent of Micronas GmbH. Edition June 2, 2005; Order No. 6251-510-1PI Micronas GmbH Hans-Bunte-Strasse 19 D-79108 Freiburg (Germany) P.O. Box 840 D-79008 Freiburg (Germany) Tel. +49-761-517-0 Fax +49-761-517-2174 E-mail: docservice@micronas.com www.micronas.com |
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