SKY12235-11 - Skyworks Solutions, Inc.

DATA SHEET
SKY12235-11: High IIP3 1.4 to 2.4 GHz Voltage-Controlled
Variable Attenuator
Applications
Control
Voltage
Control
Voltage
RF
In/Out
RF
Out/In
 Automatic power leveling/gain control circuits in cellular base
stations and point-to-point radio IF chains
 General wireless systems including WiMAX, LTE, WCDMA,
VSAT, and military communications
Features
 1.4 to 2.4 GHz broadband operating range
 Maximum attenuation level: 36 dB
 Control voltage range: 0 to 5 V
 High IIP3: +61 dBm
 Low current consumption: <2 mA @ maximum attenuation
 Small, MCM (8-pin, 4.9 x 3.2 mm) package (MSL3, 260 C per
JEDEC J-STD-020)
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
S1660
Figure 1. SKY12235-11 Block Diagram
Description
The SKY12235-11 is a voltage-controlled variable attenuator from
Skyworks series of high 3rd Order Input Intercept Point (IIP3)
components. The device has been designed to operate over the
1.4 to 2.4 GHz frequency band, but is specifically optimized for
use as a wide dynamic range, low distortion attenuator, centered
at 1.9 GHz.
The SKY12235-11 provides monotonic attenuation performance
over its entire control voltage range. This attenuator is comprised
of a pair of matched PIN diodes that terminate two ports of its
internal 90-degree hybrid coupler. The diodes are biased using an
external control voltage signal. The attenuator requires no
external components. It operates with a control voltage range of 0
to 5 V and a 1.7 mA typical control current at maximum
attenuation.
A functional block diagram is shown in Figure 1. The pin
configuration and package are shown in Figure 2. Signal pin
assignments and functional pin descriptions are provided in
Table 1.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201933F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice March 25, 2014
1
GND
J1
8
7
6
2
3
4
V_CONTROL
5
GND
1
V_CONTROL
GND
J2
DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
GND
S1661
Figure 2. SKY12235-11 Pinout – 8-Pin MCM
(Top View)
Table 1. SKY12235-11 Signal Descriptions
Pin
Name
Description
Pin
Name
Description
1
GND
Ground. Must be connected to PCB ground
using lowest possible inductance path.
5
GND
Ground. Must be connected to PCB ground
using lowest possible inductance path.
2
V_CONTROL
Control voltage input (voltage applied is
nominally equal to the voltage applied to
pin 4)
6
J1
RF input/output
3
GND
Ground. Must be connected to PCB ground
using lowest possible inductance path.
7
GND
Ground. Must be connected to PCB ground
using lowest possible inductance path.
4
V_CONTROL
Control voltage input (voltage applied is
nominally equal to the voltage applied to
pin 2)
8
J2
RF output/input
Technical Description
The SKY12235-11 is a 50 Ω matched voltage controlled variable
attenuator with monotonic attenuation performance from 1.4 to
2.4 GHz over its entire control voltage range. This attenuator
requires no external biasing or RF matching components.
Monotonic performance means the attenuation increases as the
applied DC voltage increases. This attenuator is comprised of a
pair of matched PIN diodes that terminate two ports of an internal
90-degree hybrid coupler.
The diodes are biased using an external control voltage signal that
sets the bias current through a resistive network. The attenuator
operates with a control voltage range of 0 to 5 V and a 1.7 mA
typical control current at maximum attenuation. As the control
voltage increases, the bias current through each of the PIN diodes
also increases. This increased bias current lowers the resistance
of the PIN diodes. Maximum attenuation occurs when the
resistance of the PIN diodes equals the characteristic impedance
of the hybrid coupler ports, which they terminate. This occurs at a
control voltage of approximately 5 VDC.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY12235-11 are provided
in Table 2. Electrical specifications are provided in Table 3.
Performance characteristics for the SKY12235-11 are illustrated
in Figures 3 through 8.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
Table 2. SKY12235-11 Absolute Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Units
10
V
Control voltage
VCONTROL
RF input power (CW)
PIN
4
W
Control current
Icc
50
mA
Diode reverse bias voltage
50
V
Storage temperature
TSTG
–40
+85
C
Operating temperature
TOP
–40
+85
C
Electrostatic discharge:
ESD
1000
500
100
V
V
V
Charged Device Model (CDM), Class 4
Human Body Model (HBM), Class 1B
Machine Model (MM), Class A
Note:
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.
Table 3. SKY12235-11 Electrical Specifications (Note 1)
(TOP = +25 C, VCONTROL = 0 to 5 V, PIN = 0 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typical
25
36
dB
VCONTROL = 5 V
1.7
mA
IL
VCONTROL = 0 V,
f = 1.4 to 2.4 GHz
1.8
Return loss
RL
VCONTROL = 0 V,
f = 1.4 to 2.4 GHz
3rd Order Input Intercept Point (Note 2)
IIP3
PIN = +8 dBm each tone,
VCONTROL = 0 V,
f1 = 1.900 GHz,
f2 = 1.910 GHz
Attenuation
Attn
VCONTROL = 5 V,
f = 1.9 GHz
Control current
ICC
Insertion loss
7
Max
2.5
Units
dB
18
dB
+61
dBm
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: Minimum specification is guaranteed by design and is not 100% production tested.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201933F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 25, 2014
3
DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
Typical Performance Characteristics
(TOP = +25 C, VCONTROL = 0 to 5 V, PIN = 0 dBm, Characteristic Impedance [ZO] = 50 Ω, J1 = Input Port, J2 = Output Port, Unless Otherwise
Noted)
0
0
–5
–10
–10
–15
Attenuation (dB)
Attenuation (dB)
+25 °C
+85 °C
–40 °C
–5
–20
–25
–30
–35
0V
1V
2V
3V
4V
5V
–40
–45
1
2
3
–20
–25
–30
–35
–40
–45
–50
0
–15
–50
4
0
1
2
Frequency (GHz)
3
4
5
6
Control Voltage (V)
Figure 3. Attenuation vs Frequency Over Control Voltage
Figure 4. Attenuation vs Control Voltage Over Temperature
(f = 1.90 GHz)
0
S-Parameter Magnitude (dB)
0
Attenuation Flatness (dB)
–1
–2
–3
–4
–5
–5
–10
–15
–20
S11
S21
S22
–25
–6
–30
–7
0
1
2
3
4
5
Control Voltage (V)
Figure 5. Attenuation Flatness vs Control Voltage
(f = 1.4 to 2.4 GHz)
6
0
1
2
3
Frequency (GHz)
Figure 6. S-Parameter Magnitude vs Frequency
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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4
0
0
–5
–5
Output Return Loss (dB)
Input Return Loss (dB)
DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
–10
–15
–20
0V
1V
2V
3V
4V
5V
–25
–30
–10
–15
–20
0V
1V
2V
3V
4V
5V
–25
–30
0
1
2
3
4
Frequency (GHz)
Figure 7. Input Return Loss vs Frequency Over Control Voltage
0
1
2
3
4
Frequency (GHz)
Figure 8. Output Return Loss vs Frequency Over Control Voltage
Evaluation Board Description
Package and Handling Information
The SKY12235-11 Evaluation Board is used to test the
performance of the SKY12235-11 variable attenuator. An
assembly drawing for the Evaluation Board is shown in Figure 9.
The Evaluation Board layer detail is shown in Figure 10.
Since the device package is sensitive to moisture absorption, it is
baked and vacuum packed before shipping. 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 attenuation level of the SKY12235-11 is controlled by
applying 0 to 5 V to the V_CONTROL pins.
Package Dimensions
The PCB layout footprint for the SKY12235-11 is shown in
Figure 11. Typical case markings are shown in Figure 12.
Package dimensions for the 8-pin MCM are shown in Figure 13,
and tape and reel dimensions are provided in Figure 14.
The SKY12235-11 is rated to Moisture Sensitivity Level 3 (MSL3)
at 260 C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
PCB Design & SMT Assembly/Rework Guidelines for MCM-L
Packages, document number 101752.
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 Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201933F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 25, 2014
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DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
S1662a
Figure 9. SKY12235-11 Evaluation Board Assembly Diagram
Cross Section
Name
Thickness (in)
Material
Top Soldermask
L1
(0.0028)
Cu foil
0.012 ± 0.0006
Rogers RO4003C Core
L2
(0.0014)
Cu foil
Laminate
(Note 1)
FR4 Prepreg
L3
(0.0014)
Cu foil
0.010 ± 0.0006
FR4 Core
(0.0028)
Cu foil
Laminate
Laminate
L4
Bottom Soldermask
Note 1: Adjust this thickness to meet total thickness goal of 0.062 ± 0.005 inches.
S2531
Figure 10. Layer Detail Physical Characteristics
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
5.2
Pin 8
5.2
6x 0.8
Pin 8
4x 0.8
6x 0.75
4x 0.75
2x 0.8
3.5
3.5
Pin 1
Pin 1
0.25
Package Outline
Package Outline
1.37 Typ.
1.37 Typ.
2x 0.93
Stencil Aperture
Top View
Metallization
Top View
5.3
Pin 8
6x 0.9
6x 0.85
2x 0.9
3.6
Pin 1
Package Outline
1.37 Typ.
All measurements in millimeters
2x 1.03
Solder Mask Opening
Top View
S1667
Figure 11. SKY12235-11 PCB Layout Footprint
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
Pin 1
Indicator
Skyworks Part #,
Revision #
Lot #
12235-11
XXXXXX.XX
YYMM CC
YY = Calendar Year
MM = Month Package Sealed
CC = County Code
Pin 1
Indicator
0
8X SMT Pad
B
4.9
0.15 A B C
4X 1.37
Figure 12. Typical Part Markings
(Top View)
C
Pin 8
Pin 1
Indicator
Pin 1
3.2
0
B
A
A
1 ± 0.1
0.15 A B C
0.1
Top View
Side View
Bottom View
0.337 ± 0.1
0.4 ± 0.05
R(0.1)
R(0.1)
Metal Pad Edge
0.4 ± 0.05
0.25 ± 0.1
Metal Pad Edge
(0.1)
(0.1)
Detail A
Detail B
SMT Pad
3X This Rotation
3X Rotated 180o
SMT Pad
1X This Rotation
1X Rotated 180o
All measurements are in millimeters.
Dimensioning and tolerancing according to ASME Y14.5M-1994.
Figure 13. SKY12235-11 8-Pin MCM Package Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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S1554
DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
∅1.50 + 0.1/–0.0
Pin #1
0.30 ± 0.05
4.00 ± 0.10
2.00 ± 0.05
5.20 ± 0.10
B
A
A
12.00 ± 0.30
5.50 ± 0.05
1.75 ± 0.10
B
8.00 ± 0.10
1.30 ± 0.10
∅1.50 Min.
3.50 ± 0.10
B
Notes:
1. Carrier tape: black conductive polycarbonate or polystyrene.
2. Cover tape material: transparent conductive PSA.
3. Cover tape size: 9.30 mm width.
4. Sprocket hole (10) pitch cumulative tolerance: ±0.20 mm.
5. All measurements are in millimeters.
A
S1680
Figure 14. SKY12235-11 Tape and Reel Dimensions
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201933F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • March 25, 2014
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DATA SHEET • SKY12235-11 VARIABLE ATTENUATOR
Ordering Information
Model Name
SKY12235-11: Voltage-Controlled Variable Attenuator
Manufacturing Part Number
SKY12235-11
Evaluation Board Part Number
SKY12235-11-EVB
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