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1.8V, Ultra-Low Power, DirectDrive Video Filter Amplifiers

Industry's First 1.8V, Ultra-Low-Power Video-Filter Amplifier Operates from Digital 1.8V Supply, Simplifying Circuitry

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 5.8mW Quiescent Power Consumption
  • 11.7mW Average Power Consumption
  • 1.8V or 2.5V Single-Supply Operation
  • Reconstruction Filter with 8.1MHz Passband and 46dB Attenuation at 27MHz (MAX9509)
  • DirectDrive Sets Video Output Black Level near Ground
  • DC-Coupled Input/Output
  • Transparent Input Sync-Tip Clamp
  • Internal Fixed Gain of 8
  • 10nA Shutdown Supply Current

Applications/Uses

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

Description

Operating from a 1.8V single power supply, the MAX9509/MAX9510 amplify standard-definition video signals and only consume 5.8mW quiescent power and 11.7mW average power. The MAX9509/MAX9510 leverage Maxim's DirectDrive™ technology to generate a clean, internal negative supply. Combining the internal negative power supply with the external positive 1.8V supply, the MAX9509/MAX9510 are able to drive a 2VP-P video signal into a 150Ω load.

Besides increasing the output voltage range, 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 little noise into the video output, making the picture visibly flawless.

The MAX9509/MAX9510 are designed to operate from the 1.8V digital power supply. The high power-supply rejection ratio (49dB at 100kHz) allows the MAX9509/MAX9510 to reject the noise from the digital power supply.

The MAX9509 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 8.1MHz and 46dB attenuation at 27MHz. The large-signal, ±1dB passband flatness of the MAX9510 video amplifier is typically 8.4MHz, and the large signal -3dB frequency is typically 11.4MHz.

The input of the MAX9509/MAX9510 can be directly connected to the output of a video DAC. The MAX9509/MAX9510 also feature a transparent input sync-tip clamp, allowing AC-coupling of input signals with different DC biases. The MAX9509/MAX9510 have 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. The devices operate from a 1.8V or 2.5V single supply and feature a 10nA low-power shutdown mode. The MAX9509 is offered in an 8-pin TDFN package and the MAX9510 is offered in an 8-pin µMAX® package.

Simplified Block Diagram

MAX9509, MAX9510: Block Diagram MAX9509, MAX9510: Block Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.