AD8190-EVAL Analog Devices, AD8190-EVAL Datasheet - Page 22

• Manufacturer Part Number: AD8190-EVAL
• Description: 2:1 HDMI/DVI Switch with Equalization
• Manufacturer: Analog Devices

AD8190
Power Supply Bypassing
The AD8190 requires minimal supply bypassing. When
powering the supplies individually, place a 0.01 μF capacitor
between each 3.3 V supply pin (AVCC, DVCC, VTTI, and
VTTO) and ground to filter out supply noise. Generally, bypass
capacitors should be placed near the power pins and should
connect directly to the relevant supplies (without long inter-
vening traces). For example, to improve the parasitic inductance
of the power supply decoupling capacitors, minimize the trace
length between capacitor landing pads and the vias as shown in
Figure 34.
In applications where the AD8190 is powered by a single 3.3 V
supply, it is recommended to use two reference supply planes
and bypass the 3.3 V reference plane to the ground reference
plane with one 220 pF, one 1000 pF, two 0.01 μF, and one 4.7 μF
capacitors. The capacitors should via down directly to the
Figure 34. Recommended Pad Outline for Bypass Capacitors
RECOMMENDED
NOT RECOMMENDED
EXTRA ADDED INDUCTANCE
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supply planes and be placed within a few centimeters of the
AD8190. The AMUXVCC supply does not require additional
bypassing. This scheme is illustrated in Figure 35.
AUXILIARY LINES
TMDS TRACES
Figure 35. Example Placement of Power Supply Decoupling Capacitors
Around the AD8190
AD8190
DECOUPLING
CAPACITORS