Analog Devices : Video amplifiers deliver sharp, life-like images

Analog Devices, Inc. has introduced three high-performance video amplifiers that enable high-definition (HD) television and video equipment designers to bring professional and consumer products to market with new levels of picture quality and power efficiency. Additions to ADI’s Advantiv® advanced television solutions portfolio, the ADA4420-6 video filter and the compact ADA4855-3 and ADA4856-3 triple, rail-to-rail output video amplifiers cost-effectively address consumer and industrial demand for HD content in multimedia products ranging from 1080p HDTVs and HD home theater systems to professional and industrial video applications.

“Analog Devices’ newly enhanced video filter and amplifiers enable engineers to deliver sharper, more lifelike images in high-resolution analogue video formats,” said Bill Bucklen, director, Advanced Television Segment, Analog Devices. “These compact, single-chip solutions reduce design complexity while eliminating costly system redesign in HD video applications – especially where a video filter is required to decode standard-definition content or a high-speed amplifier is needed to optimize screen images for 1080i or 1080p.”

Enhanced HD Performance

The ADA4855-3 and ADA4856-3 triple, rail-to-rail output video amplifiers deliver the best combination of speed and performance in their class, making them ideal for consumer and professional video devices that require the highest bandwidth and the widest output voltage range in order to deliver superior analogue video performance. Offering unit costs that are comparable with more complex, lower bandwidth rail-to-rail output video amplifiers, the ADA4855-3 and ADA4856-3 are ideal for high-resolution video applications that require lossless 1080i, sharper 1080p analog output video and a wide output swing. The video amplifiers also can be used as analogue video buffers in all video output devices, such as PCs, monitors, projectors and DVD players, eliminating the need for discrete components.

The ADA4855-3 and ADA4856-3 provide single-supply, rail-to-rail operation with greater flexibility for passing a wide range of signals, while reducing system cost and complexity. The devices deliver advanced video performance, driving a 150-ohm load with 0.01 percent differential gain error, 0.01 degrees differential phase error and 0.1-dB flatness out to 63 MHz and 85 MHz, respectively. In addition, the ADA4855-3 offers a wide 400-MHz –3-dB bandwidth at gain of 1, while the ADA4856-3 delivers 220 MHz at a fixed gain of 2.

Using a single 5-V power supply, the ADA4855-3 and ADA4856-3 consume only 7.7 mA per amplifier, while delivering up to 40 mA of load current, and on-chip power-down features reduce the supply current to 1 mA. When combined with high dynamic range, the low supply current makes these products ideal for any application that needs a power efficient, high-performance rail-to-rail operational amplifier.

Reducing HD/SD Design Time and Cost

The ADA4420-6 video filter offers HDTV and HD component video subsystem engineers advanced performance, flexibility and power efficiency. By integrating a number of buffers, discrete components and six independent filter channels—three for SD (Y/C, CVBS) and three for HD component (YPbPr or RGB) signals—the ADA4420-6 offers designers a single-chip solution that supports HD, SD (standard definition), S-Video, and composite video signals. With resolution up to 1080i, the new video filter is well-suited for HD consumer applications or for use as a reconstruction filter at the digital-to-analogue outputs of video encoders. The ADA4420-6’s compact (0.197 inches ¥ 0.158 inches) 16-pin QSOP (Quarter Size Outline Package) size reduces board space requirements by 85 percent over traditional video amplifiers configured as filters, reduces the bill of materials by 50 percent and eliminates several days of design time for products including set-top boxes, DVD players and recorders.

Unlike larger packaged, less integrated devices with lower levels of HD flatness, reduced rejection and support for only one video load, the ADA4420-6 drives two parallel 75 ohm loads while providing 1-dB flatness out to 30 MHz typical, and HD rejection of –35 dB at 75 MHz. In addition, the new video filter has only 10 nanoseconds maximum group delay and provides 0.19 percent differential gain and 0.76 degrees differential phase. The ADA4420-6 operates on a single 5-V power supply and offers a power-saving disable feature that reduces the supply current to less than 8 mA when the device is not in use.

Availability and Pricing

Available in full production quantities, the ADA4420-6 video filter is packaged in a 16-lead QSOP and is priced at $0.69 per unit in 1,000-unit quantities. The ADA4855-3 and ADA4856-3 video amplifiers are sampling now with full production quantities available in October 2008. Both video amplifiers are available in 16-lead LFCSP (lead-frame chip-scale package) packages and are priced at $1.39 in 1,000-unit quantities. The ADA4855-3 and ADA4856-3 are designed to work over the extended temperature range of -40 degrees C to +105 degrees C. The ADA4420-6 operates in the extended industrial temperature range of -40 degrees C to +85 degrees C.

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ADI’s Advantiv® Advanced Television Solutions Portfolio

Analog Devices' Advantiv advanced television solutions are used in the world’s leading consumer electronics brands, enabling the true-to-life audio and video quality discriminating consumers have come to expect everywhere, every time. Supported by ADI’s system-level experts, ADI’s Advantiv advanced television solutions drive many of today's high-definition system components, including HDTVs, Blu-ray™ disc players, digital video recorders (DVRs), audio/video receivers (AVRs), digital still cameras (DSCs), camcorders, and the HD interconnects that carry content between them. The broad range of Advantiv advanced television solutions enable high-performance functionality and features to meet all consumer electronics price points. For more information on ADI's Advantiv advanced television solutions portfolio, visit

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker “ADI” and is included in the S&P 500 Index.

About Analog Devices in Europe

In Europe, Analog Devices accounts for about one fifth of the company’s worldwide revenues and worldwide work force. The company has a manufacturing facility in Limerick, Ireland, and seven design centers in Denmark, England, Scotland, Spain and Ireland. European client references include main telecom equipment manufacturers Alcatel, Ericsson, Nokia-Siemens Networks, automotive systems manufacturers such as Autoliv and Continental, as well as consumer references such as Harman and Philips, and a variety of industrial clients including ABB, Agilent Technologies and Rhode & Schwarz.

Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.

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