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Video filter amp cuts consumption to 1?A

Posted: 11 Mar 2009 ?? ?Print Version ?Bookmark and Share

Keywords:amplifier video filter? SD playback? portable device?


Maxim Integrated Products has released the MAX9519, claimed to be the smallest, lowest pin-count video filter amplifier for standard-definition (SD) video connections from portable devices to TVs.

Packaged in a 1mm x 1mm, 4-bump UCSP, this device features Maxim's proprietary SmartSleep technology, which reduces current consumption to 1?A in shutdown mode and eliminates the need for external shutdown circuitry. The MAX9519 is suitable for low-power, space-constrained portable applications such as cellphones, digital still/video cameras and portable media players, which require SD video output to a TV.

In addition, the SmartSleep technology allows the MAX9519 to intelligently manage power consumption with no external intervention from a host processor or microcontroller. SmartSleep circuitry constantly monitors the video input for a valid video signal and the video output for the presence of a load. The MAX9519 only turns on and enters its full operating mode when it detects both video playback and a live connection to the TV. In shutdown mode, this circuitry disables the filter and output amplifier, reducing power consumption to an ultralow 1?A. At 1mm x 1mm, the MAX9519 consumes 30 percent less board space than competitive active-filter amplifiers, and 50 percent less space than passive-filter solutions.

Featuring a higher-order filter than competitive devices, the MAX9519 achieves much better attenuation of high-frequency artifacts and noise in the video-output signal. The integrated 5th-order filter features 1dB passband flatness up to 9MHz and 48.5dB attenuation at 27MHz, thereby ensuring signal integrity in ultracompact designs.

The MAX9519 operates from a 2.7V to 3.6V supply and is fully specified over the -40C to +125C temperature range. Prices start at $0.34 (1000-up, FOB USA).

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