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DATA SHEET ? SKY12328-350LF 5-BIT DIGITAL ATTENUATOR
Figure 7. Attenuation vs Frequency
(0.5 dB to 7.5 dB, Normalized to Insertion Loss)
Table 4. SKY12328-350LF Truth Table
Figure 8. Output Return Loss vs Frequency
Nominal
Attenuation
Reference insertion loss
0.5 dB
1.0 dB
2.0 dB
4.0 dB
8.0 dB
15.5 dB
V1
(Pin 1)
V HIGH
V LOW
V HIGH
V HIGH
V HIGH
V HIGH
V LOW
V2
(Pin 2)
V HIGH
V HIGH
V LOW
V HIGH
V HIGH
V HIGH
V LOW
V3
(Pin 3)
V HIGH
V HIGH
V HIGH
V LOW
V HIGH
V HIGH
V LOW
V4
(Pin 4)
V HIGH
V HIGH
V HIGH
V HIGH
V LOW
V HIGH
V LOW
V5
(Pin 5)
V HIGH
V HIGH
V HIGH
V HIGH
V HIGH
V LOW
V LOW
Note :
V HIGH = + 3 V to 5 V . V LOW = 0 V to + 0. 2 V.
This Table shows the logic required for the major bits and full attenuation. Bit states need to be used in combination to set the sum of the bits selected.
Evaluation Board Description
The SKY12328 - 350LF E valuation B oard is used to test the
performance of the SKY12328 - 350LF digital attenuator . An
assembly drawing for the Evaluation Board is shown in Figure 9
and an Evaluation Board schematic diagram is shown in
Figure 10 .
Package Dimensions
Typical case markings are shown in Figure 11. Package
dimensions for the 16 - pin QFN are shown in Figure 12, and tape
and reel dimensions are provided in Figure 13 .
Package and Handling Information
Instructions on the shipping container label regarding exposure to
moisture after the container seal is broken must be followed.
Otherwise, problems related to moisture absorption may occur
when the part is subjected to high temperature during solder
assembly.
THE SKY12328 - 350LF is rated to Moisture Sensitivity Level 1
(MSL1) at 260 ° C. It can be used for lead or lead - free soldering.
For additional information, refer to the Skyworks Application Note,
Solder Reflow Information , document number 200164.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
Skyworks Solution s, Inc. ? Phone [781] 376 - 3000 ? Fax [781] 376 - 3100 ? sales@skyworksinc.com ? www.skyworksinc.com
200753D ? Skyworks Proprietary Information ? Products and Product Information are Subject to Change Without Notice ? March 2, 2011
5
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