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Ultralow Power SD Video Filter with Load Detection

Model: ADA4431-1

  • Third-order, low-pass video filter
  • 1 dB flatness out to 6 MHz
  • 27 dB rejection at 27 MHz
  • Low quiescent current: 4.7 mA typical
  • Low power-down current: 24 micro A typical
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The ADA4431-1 is a fully integrated video reconstruction filter that combines excellent video specifications with low power consumption, making it ideal for portable video filtering applications. The ADA4431-1 is able to detect whether a video load is present at the output, powering down the device when the load is disconnected. The ADA4431-1 operates on single supplies as low as 2.5 V while providing the dynamic range required by the most demanding video systems. The on-board charge pump provides a virtual negative supply, allowing the video signal to be dc-coupled and the black level to be set to ground, while the sync passes cleanly at 300 mV below ground. When operating with the charge pump off, the ADA4431-1 provides a dc offset to keep the sync tip approximately 100 mV above ground. In addition, the part features SAG correction, which permits the use of smaller capacitors in applications with ac-coupled outputs. The ADA4431-1 is packaged in a low profile 16-lead LFCSP and operates in the industrial temperature range of -40°C to +85°C.
  • Third-order, low-pass video filter
  • 1 dB flatness out to 6 MHz
  • 27 dB rejection at 27 MHz
  • Low quiescent current: 4.7 mA typical
  • Low power-down current: 24 micro A typical
  • Load detection capability
  • SAG correction
  • Allows use of smaller capacitors in ac-coupled outputs
  • Low supply voltage: 2.5 V to 3.6 V
  • Charge pump
  • Creates a negative voltage from single positive supply
  • Allows capless output coupling with no dc offset
  • Rail-to-rail output
  • High input-to-output isolation in disabled state
  • 89 dB @ 1 MHz
  • Small package
  • 3 mm × 3 mm LFCSP
  • Low 0.55 mm package height
  • Wide operating temperature range:
  • -40°C to +85°C
 
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