MIC1700 HDTV/SDTV 6th Order Video Filter for Component Video plus Composite Video - Micrel - #1

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October 2003 1 MIC1700 MIC1700 Micrel MIC1700 HDTV/SDTV 6th Order Video Filter for Component Video plus Composite Video General Description The MIC1700 is a complete reconstruction filter solution for high definition set-top boxes. The device has two independent component inputs (YPRPB or RGB) selectable via a 2-to-1 multiplexer, and a separate Svideo input (Y/C). Component channel filters have a selectable cutoff frequency (8MHz or 36MHz) to support both standard (SD) and high definition (HD) applications. S-video filters have fixed cutoff (8MHz) to support legacy composite applications. In addition, S-video channels are summed to provide a filtered CV output for an RF modulator or VCR. All inputs are DC-coupled with a 0V to 1V peak-to-peak range. All outputs are designed to drive 2V peak-to-peak into AC-coupled 150Ù loads. This supports 1V peak-to-peak into a 75Ù load with a 75Ù series source terminator. Filters have 6th order near Butterworth characteristics with cutoffs of 8MHz (SD and CV) and 36MHz (HD). These characteristics are chosen to provide good passband flatness with sufficient stop band attenuation and minimal group delay distortion. The device operates from a 5VDC supply. Data sheets and support documentation are available at Micrel’s web site, www.micrel.com. Typical Application 17 12 18 11 1 28 27 26 25 24 23 22 21 20 19 2 3 4 5 6 7 8 9 10 4.7ìF 0.1ìF 75Ù 75Ù 220ìF Y1OUT PROUT PBOUT YOUT COUT CVOUT VCC VCC MIC1700x-x MUX GND HSEL Y1A Y1B PR1 PR2 GND PB1 PB2 YIN CIN GND VCC VCC VCC Y1OUT PROUT PBOUT GND YOUT COUT CVOUT GND 75Ù 75Ù 75Ù 75Ù 75Ù MUX HSEL Y1A Y1B Composite YIN Inputs CIN PR1 PR2 PB1 PB2 220ìF 220ìF 220ìF 220ìF 220ìF 75Ù 75Ù 75Ù 75Ù 75Ù Features • S-video (Y/C) input, S-video and summed (CV) output • 2 YPR PB or RGB inputs, YPRPB or RGB output • YPR PB/RGB 2-1 input multiplexer • DC coupled inputs – AC-coupled output drive • 6db output gain for 75Ù source termination • Component filters selectable for SD or HD cutoffs • 6th order Butterworth characteristic • Flat passband (HD 0.5dB @ 30MHz typ) • Low group delay distortion (HD: 12ns @ 30MHz typ) • Single 5V supply • 28-pin wide body SOIC package (with exposed pad for improved thermal performance) Applications • HDTV • HDTV set-top boxes • Video games • HDTV systems • DVD players • Digital satellite set-top boxes • HDTV monitors Ordering Information Part Number Junction Temp. Range Package MIC1700BWME 0°C to +70°C SOIC-28 Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com