January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C
DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR
Table 2. SKY12339-350LF Absolute Maximum Ratings
Parameter
RF input power:
@3V
@5V
Supply voltage
Control voltage
Operating temperature
Storage temperature
Note:
Symbol
P
IN
Minimum
Typical
+31
+33
Maximum
Units
dBm
dBm
V
S
V
CTL
T
OP
T
STG
4.5
–0.2
–40
–65
5.5
V
S
+85
+150
V
V
°C
°C
Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device.
CAUTION:
Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device
must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body
or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times.
January 17, 2011 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201143C
DATA SHEET • SKY12339-350LF 5-BIT DIGITAL ATTENUATOR
Figure 9. Attenuation Error vs Attenuation State,
(f = 1.8 GHz)
Table 4. SKY12339-350LF Truth Table
RF1/RF2 (Pins 2 & 11)
Attenuation
Insertion loss
1.0 dB
2.0 dB
4.0 dB
8.0 dB
16 dB
31 dB
Note:
V1
(Pin 16)
1
0
1
1
1
1
0
V2
(Pin 15)
1
1
0
1
1
1
0
V3
(Pin 14)
1
1
1
0
1
1
0
V4
(Pin 13)
1
1
1
1
0
1
0
V5
(Pin 12)
1
1
1
1
1
0
0
“1” = +2.7 V to V
S
. “0” = –0.2 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 SKY12339-350LF Evaluation Board is used to test the
performance of the SKY12339-350LF digital attenuator. An
assembly drawing for the Evaluation Board is shown in Figure 10
and an Evaluation Board schematic diagram is shown in
Figure 11. Table 5 provides the Bill of Materials (BOM) list for
Evaluation Board components.
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 SKY12339-350LF 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.
Package Dimensions
The PCB layout footprint for the SKY12339-350LF is shown in
Figure 12. Typical case markings are noted in Figure 13. Package
dimensions for the 16-pin QFN are shown in Figure 14, and tape
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