SCAN928028TUF/NOPB National Semiconductor, SCAN928028TUF/NOPB Datasheet - Page 14

• Manufacturer Part Number: SCAN928028TUF/NOPB
• Description: IC SERIALIZER 8CH 10:1 196-LBGA
• Manufacturer: National Semiconductor
• Series: SCANr

Specifications of SCAN928028TUF/NOPB

• Function: Serializer
• Data Rate: 480Mbps
• Input Type: LVDS
• Output Type: LVDS
• Number Of Inputs: 10
• Number Of Outputs: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 196-LBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *SCAN928028TUF; *SCAN928028TUF/NOPB; SCAN928028TUF

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case, filtering of this noise spectrum may be required. A notch
filter response is best to provide a stable VDD, suppression
of the noise band, and good high-frequency response (clock
fundamental). This may be accomplished with a pie filter
(CRC or CLC). The pie filter should be located close to the
PVDD power pin. Separate power planes for the PVDD pins
is typically not required.
AVDD = LVDS SECTION POWER SUPPLY
The AVDD pin supplies the LVDS portion of the circuit. The
SCAN928028 has nine AVDD pins. Due to the nature of the
design, current draw is not excessive on these pins. A 0.1uF
capacitor is sufficient for these pins. If space is available a
0.01uF may be used in parallel with the 0.1uF capacitor for
additional high frequency filtering.
Application Diagram
FIGURE 12. Typical Application Circuit
14
GROUNDS
The AGND pin should be connected to the signal common in
the cable for the return path of any common-mode current.
Most of the LVDS current will be odd-mode and return within
the interconnect pair. A small amount of current may be even-
mode due to coupled noise, and driver imbalances. This
current should return via a low impedance known path.
A solid ground plane is recommended for DVDD, PVDD or
AVDD. Using a split plane may have a potential problem of
ground loops, or difference in ground potential at various
ground pins of the device.
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