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MAX7481 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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General Description The MAX7481/MAX7482 bidirectional video filters/ buffers provide the reconstruction filter and line drive buffer for both composite (CVBS) and S-Video (Y/C) video signals in playback mode, and anti-aliasing in record mode for portable media devices. Each channel consists of a lowpass filter and an output buffer capa- ble of driving a full 2VP-P video signal into one standard 150 Ω load (DC-coupled to ground). In record mode, the MAX7481/MAX7482 output buffers have a gain of +6dB. In playback mode, the MAX7481 output buffers have a gain of +6dB and the MAX7482 output buffers have a gain of +7dB. The MAX7481/MAX7482 feature DirectDrive™ by utilizing an internal negative charge pump and regulator to main- tain the output blanking level at ground, eliminating the need for a negative supply voltage, a large output cou- pling capacitor, or a sag correction configuration. The MAX7481/MAX7482 operate from a single +2.7V to +3.6V power supply. These devices are available in a space-saving 28-pin TQFN package and operate over the -40°C to +85°C extended temperature range. Applications Portable Media Devices Digital Camcorders Digital Cameras Features ♦ Composite and S-Video, Video-Playback and Video- Record Interface for Portable Video Devices ♦ Saves Space by Sharing Connectors in Portable Devices ♦ DirectDrive Eliminates Expensive AC-Coupling Capacitors Blanking Level at Ground with Single Supply ♦ Composite and Y/C Signals ♦ Advanced Power-Down Modes for Extended Battery Life ♦ Low Supply Current in Shutdown Mode, < 1µA (typ) ♦ Filter Response Ideal for NTSC and PAL ♦ +6dB (MAX7481) or +7dB (MAX7482) Gain ♦ +2.7V to +3.6V Single-Supply Operation ♦ Small, 28-Pin, TQFN Package (5mm x 5mm) Bidirectional Video Filters/Buffers for Composite and S-Video Portable Media Devices ________________________________________________________________ Maxim Integrated Products 1 19-0671; Rev 0; 11/06 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. Simplified Block Diagram Ordering Information PART TEMP RANGE PIN- PACKAGE PKG CODE MAX7481ETI+ -40°C to +85°C 28 TQFN-EP* T2855-6 MAX7482ETI+ -40°C to +85°C 28 TQFN-EP* T2855-6 CVBSON YCON P/R LPF LPF VIDEO ADC VIDEO DAC VIDEO ADC CONTROL LOGIC VIDEO DAC VIDEO PROCESSOR IN1 IN2 IN3 IN4 IN5 OUT1 OUT2 OUT3 OUT5 OUT4 0V 0V 0V 0V MAX7481 MAX7482 RECORD SIGNAL FLOW PLAYBACK SIGNAL FLOW + Denotes lead-free package. * EP = Exposed pad. Pin Configuration appears at end of data sheet. |
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