Catalog
Ultralow Power SD Video Filter with Load Detection
Key Features
• Third-order, low-pass video filter1 dB flatness out to 6 MHz27 dB rejection at 27 MHz
• Low quiescent current:4.7 mA typical
• Low power-down current:24 μA typical
• Load detection capability
• SAG correctionAllows use of smaller capacitors in ac-coupled outputs
• Low supply voltage: 2.5 V to 3.6 V
• Charge pumpCreates a negative voltage from single positive supplyAllows capless output coupling with no dc offset
• Rail-to-rail output
• High input-to-output isolation indisabled state 89 dB @ 1 MHz
• Small package3 mm × 3 mm LFCSPLow 0.55 mm package height
• Wide operating temperature range:−40°C to +85°C
• Portable media players
• Portable gaming consoles
• Cell phones
• Digital still cameras
• Portable DVD players
• Portable video cameras
Description
AI
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.APPLICATIONSPortable media playersPortable gaming consolesCell phonesDigital still camerasPortable DVD playersPortable video cameras
