201165G • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 30, 2014
1
DATA SHEET • SKY12338-337LF: TWO-BIT DIGITAL ATTENUATOR
Table 1. SKY12338-337LF Signal Descriptions (Note 1)
Pin
1
2
3
4
5
6
N/C
RF1
N/C
N/C
N/C
N/C
Name
Description
No connection required. May be connected
to ground with no change in performance.
RF port. Must be DC blocked.
No connection required. May be connected
to ground with no change in performance.
No connection required. May be connected
to ground with no change in performance.
No connection required. May be connected
to ground with no change in performance.
No connection required. May be connected
to ground with no change in performance.
Pin
7
8
9
10
11
12
N/C
RF2
N/C
VCTL2
VCTL1
VDD
Name
Description
No connection required. May be connected
to ground with no change in performance.
RF port. Must be DC blocked.
No connection required. May be connected
to ground with no change in performance.
DC control voltage. Controls 12 dB
attenuation state. Refer to Table 4.
DC control voltage. Controls 6 dB attenuation
state. Refer to Table 4.
DC power supply.
Note 1:
Exposed pad must be grounded.
Table 2. SKY12338-337LF Absolute Maximum Ratings (Note 1)
Parameter
Supply voltage
Control voltage
RF input power @ 3 V
Operating temperature
Storage temperature
V
DD
VCTL1, VCTL2
P
IN
T
OP
T
STG
–40
–65
Symbol
Minimum
Typical
Maximum
5.5
V
DD
+ 0.1
+27
+85
+150
Units
V
V
dBm
C
C
Note 1:
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.
Functional Description
This attenuator has a least significant bit (LSB) of 6 dB and a most
significant bit (MSB) of 12 dB for a total of 18 dB available
attenuation. Pins 10 and 11 (VCTL2 and VCTL1) control the state
of the 6 dB and 12 dB attenuation bits, respectively. For each bit,
a logic low enables the attenuation state while a logic high
enables a low insertion loss state.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY12338-337LF are
provided in Table 2. Electrical specifications are provided in
Table 3.
The state of the SKY12338-337LF is determined by the logic
provided in Table 4. The VCTL1 and VCTL2 signals control the
6 dB and 12 dB attenuation bits, respectively. For each bit, a logic
low enables the attenuation state, while a logic high enables the
insertion loss state.
Typical performance characteristics are illustrated in Figure 3 to
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