MAX9516
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MAX9516

1.8V, Ultra-Low-Power, DirectDrive Video Filter Amplifier with Load Detect

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Automatically Adjusts IC Power Consumption and Reduces Overall System Power Consumption Based on Output Load Status

Part Details
Features
  • 1.8V or 2.5V Single-Supply Operation
  • Low Power Consumption (6mW Quiescent, 12mW Average)
  • Video Load Detect
  • Reconstruction Filter with 5.5MHz Passband
  • DirectDrive Sets Video Output Black Level Near Ground
  • DC-Coupled Input/Output
  • Transparent Input Sync-Tip Clamp
Additional Details
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Operating at 1.8V from a single power supply, the MAX9516 amplifies standard-definition video signals and only consumes 6mW quiescent power and 12mW average power. The MAX9516 leverages Maxim's DirectDrive™ technology. Combining DirectDrive with the external positive 1.8V supply, the MAX9516 is able to drive a 2VP-P video signal into a 150Ω load. The MAX9516 has the ability to detect and report the presence of a video load and reduce power consumption when the load is not present.

The MAX9516 can detect the presence of a video load and report a change in load through the LOAD flag. This feature helps reduce overall system power consumption because the video encoder and the MAX9516 only need to be turned on when a video load is connected. If no load is connected, the MAX9516 is placed in an active-detect mode and only consumes 31µW.

Maxim's DirectDrive technology eliminates large output-coupling capacitors and sets the output video black level near ground. DirectDrive requires an integrated charge pump and an internal linear regulator to create a clean negative power supply so that the amplifier can pull the sync below ground. The charge pump injects so little noise into the video output that the picture is visibly flawless.

The MAX9516 features an internal reconstruction filter that smoothes the steps and reduces the spikes on the video signal from the video digital-to-analog converter (DAC). The reconstruction filter typically has ±1dB passband flatness of 7.5MHz, and 46dB (typ) attenuation at 27MHz.

The input of the MAX9516 can be directly connected to the output of a video DAC. The MAX9516 also features a transparent input sync-tip clamp, allowing AC-coupling of input signals with different DC biases.

The MAX9516 has an internal fixed gain of 8. The input full-scale video signal is nominally 0.25VP-P, and the output full-scale video signal is nominally 2VP-P.

Applications

  • Digital Still Cameras (DSC)
  • Digital Video Cameras (DVC)
  • Mobile Phones
  • Portable Media Players (PMP)
  • Security/CCTV Cameras

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