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MAX7448EUD Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX7448EUD Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 7 page General Description The MAX7448, 4-channel, buffered video reconstruc- tion filter is ideal for anti-aliasing and digital-to-analog converter (DAC)-smoothing video applications or wher- ever analog video is reconstructed from a digital data stream (such as cable/satellite/terrestrial set-top boxes, DVD players, hard-disk recorders (HDRs), and person- al video recorders (PVRs)). This device operates from a single +5V supply and has a flat passband out to 5MHz with a stopband attenuation of 43dB at 27MHz. This makes it ideal for use with NTSC, PAL, and standard- definition digital TV (SDTV) video systems. Each output is capable of driving two standard 150 Ω video loads. The MAX7448 processes RGB and asynchronous CVBS video signals. The output video buffers have a fixed gain of +6dB. The channel used for CVBS video has high-fre- quency boost circuitry, which provides picture sharpness with +1.2dB of gain boost without degradation in the stopband. The output video drivers can be disabled with an external pin. The MAX7448 is available in a 14-pin TSSOP package with an exposed pad, and is specified over the -40°C to +85°C extended temperature range. Applications Set-Top Boxes/HDRs DVD Players Game Consoles Digital VCRs Desktop Video Editors Features o 4-Channel Filter and Buffer for RGB and CVBS Video Signals o Filter Response Ideal for NTSC, PAL, and Interlaced SDTV Video Signals o 43dB (typ) Stopband Attenuation at 27MHz o ±0.75dB (max) Passband Ripple Out to 5MHz o Blanking Level Voltage on Cable <1V o Each Channel Drives Two 150Ω Video Loads o +5V Single-Supply Voltage o Small 14-Pin TSSOP Package 4-Channel RGB Video Filter with Asynchronous CVBS Input ________________________________________________________________ Maxim Integrated Products 1 VCC GND MAX7448 OUTA * * OUTB * * OUTC * * OUTD * * 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω 75 Ω *OPTIONAL CAPACITORS INA 0.1 µF 0.1 µF 0.1 µF 0.1 µF INB INC IND D/A ENCODER D/A D/A D/A SYNC DETECTOR LOWPASS FILTER LOWPASS FILTER LOWPASS FILTER LOWPASS FILTER SYNC DETECTOR DISABLE G (WITH SYNC) R B CVBS (WITH SYNC) Functional Diagram Ordering Information 19-2989; Rev 0; 10/03 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. *EP = Exposed pad. EVALUATION KIT AVAILABLE Pin Configuration appears at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX7448EUD -40°C to +85°C 14 TSSOP-EP* |
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