ADA4430-1 Analog Devices, ADA4430-1 Datasheet - Page 15

• Manufacturer Part Number: ADA4430-1
• Description: Ultralow Power Video Filter
• Manufacturer: Analog Devices

PRINTED CIRCUIT BOARD LAYOUT
As with all high speed applications, attention to printed circuit
board layout is of paramount importance. Standard high speed
layout practices should be adhered to when designing with the
ADA4430-1. A solid ground plane is recommended, and a
0.1 μF surface-mount, ceramic power supply, decoupling
capacitor should be placed as close as possible to the supply pin.
The GND pin should be connected to the ground plane with a
trace that is as short as possible. Controlled impedance traces of
the shortest length possible should be used to connect to the
signal I/O pins and should not pass over any voids in the
ground plane. A 75 Ω impedance level is typically used in video
applications. All signal outputs of the ADA4430-1 should include
series termination resistors when driving transmission lines.
Rev. A | Page 15 of 16
When the ADA4430-1 receives its inputs from a device with
current outputs, the required load resistor value for the output
current is most often different from the characteristic impedance of
the signal traces. In this case, if the interconnections are sufficiently
short (less than 2 inches), the trace does not have to be
terminated in its characteristic impedance.
ADA4430-1