Data Sheets

PRELIMINARY DATA SHEET
SKY65186-11: 330 – 2700 MHz Dual-Channel, Variable Gain
Amplifier Front-End Module
Applications
Description
• Cellular, 3G and LTE infrastructure
Skyworks SKY65186-11 is a high dynamic range receive Variable
Gain Amplifier (VGA) Front-End Module (FEM) for 3G and LTE
infrastructures and other applications that operate in the 0.4 to
2.7 GHz band.
• Microwave radio
• Repeaters
• High performance radio links
Features
• Frequency range: 330 to 2700 MHz
• Dual channel
• 6-bit digital step attenuator for each channel
• 31.5 dB control range with 0.5 dB step size
• Single DC supply: +5 V
• Internal RF match and bias circuits
The SKY65186-11 contains two Digital Step Attenuators (DSAs)
and two Power Amplifiers (PAs). The DSA is a 6-bit attenuator with
an 0.5 dB step size that provides 31.5 dB of total attenuation. The
DSA is controlled using an on-chip Serial Peripheral Interface (SPI)
logic circuit.
The SKY65186-11 is provided in a 32-pin, 7 x 7 mm Multi-Chip
Module (MCM) package, which allows for a highly manufacturable
low cost solution. The device package and pinout for the 32-pin
MCM are shown in Figure 1. A block diagram of the SKY65186-11
is shown in Figure 2. Signal pin assignments and functional pin
descriptions are provided in Table 1.
• Small footprint, MCM (32-pin, 7 x 7 mm) package (MSL3,
260 °C per JEDEC J-STD-020)
Figure 1. SKY65186-11 Pinout – 32-Pin MCM
(Top View)
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 2. SKY65186-11 Block Diagram
Table 1. SKY65186-11 Signal Descriptions
Pin #
Name
Description
Pin #
Name
Description
1
RF_IN1
RF input 1
17
RF_OUT2
RF output 2
2
GND
Ground
18
GND
Ground
3
SPI_VCC
Supply voltage for SPI
19
GND
Ground
4
SPI_LE
Serial latch enable input
20
GND
Ground
5
SPI_DATA
Serial data input
21
GND
Ground
6
SPI_CLK
Serial clock input
22
GND
Ground
7
N/C
No connection
23
GND
Ground
8
RF_IN2
RF input 2
24
RF_OUT1
RF output 1
9
GND
Ground
25
GND
Ground
10
N/C
No connection
26
AMP1_VCC
Supply voltage for amplifier 1
11
GND
Ground
27
GND
Ground
12
GND
Ground
28
N/C
No connection
13
N/C
No connection
29
GND
Ground
14
GND
Ground
30
GND
Ground
15
AMP2_VCC
Supply voltage for amplfier 2
31
N/C
No connection
16
GND
Ground
32
GND
Ground
Technical Description
Serial I/O Control Interface
The SKY65186-11 VGA FEM contains all of the needed RF
matching and DC biasing circuits. The device is a dualchannel,digitally controlled VGA that features high linearity and a
low Noise Figure (NF). These features make the device suitable for
3G infrastructures and other applications operating in the 330 to
2700 MHz frequency range.
The three-wire serial bus consists of the SPI_CLK, SPI_LE, and
SPI_DATA control signals. The serial bus timing is shown in
Figure 3. Timing parameters are defined in Table 2. The serial
data is sent MSB first and should be sampled with the rising edge
of the serial clock (SPI_CLK). The rising edge of the latch enable
(SPI_LE) signal should be used to capture the data into holding
registers.
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Serial data is formatted as a 12-bit word. As shown in Figure 3,
the 12-bit word contains logic for both attenuators. Each word
contains the following sequence:
The minimum attenuation (0 dB) for each attenuator is achieved
using the binary data sequence 111111b. Maximum attenuation
(31.5 dB) corresponds to the binary data sequence 000000b.
Attenuator 1:
The state of the SKY65186-11 is determined by the attenuation
logic provided in Table 3 (DSA 1) and Table 4 (DSA 2).
Bit[11]: attenuation = 16 dB
Bit[10]: attenuation = 8 dB
Bit[9]: attenuation = 4 dB
Electrical and Mechanical Specifications
Bit[8]: attenuation = 2 dB
The absolute maximum ratings of the SKY65186-11 are provided
in Table 5. Recommended operating conditions are specified in
Table 6 and electrical specifications are provided in Table 7.
Bit[7]: attenuation = 1 dB
Bit[6]: attenuation = 0.5 dB
Attenuator 2:
Bit[5]: attenuation = 16 dB
Bit[4]: attenuation = 8 dB
Bit[3]: attenuation = 4 dB
Typical performance characteristics are shown in Figures 4
through 8 (330 MHz), Figures 9 through 12 (400 MHz), Figures 13
through 16 (700 MHz), Figures 17 through 20 (900 MHz),
Figures 21 through 24 (1900 MHz), and Figures 25 through 28
(2700 MHz).
Bit[2]: attenuation = 2 dB
Bit[1]: attenuation = 1 dB
Bit[0]: attenuation = 0.5 dB
Figure 3. Serial Input Timing Diagram
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Table 2. Serial Input Timing Parameters
Parameter
Value
Description
t1
25 MHz maximum
Clock frequency
t2
20 ns minimum
CLK high
t3
20 ns minimum
CLK low
t4
5 ns minimum
DATA to CLK setup time
t5
5 ns minimum
DATA to CLK hold time
t6
30 ns minimum
DATA valid
t7
5 ns minimum
LE to CLK setup time
t8
5 ns minimum
CLK to LE setup time
t9
10 ns minimum
LE pulse width
t10
20 ns minimum
Output set
Table 3. Attenuation Logic Truth Table (DSA 1)
Attenuator Control Word (Channel 1)
Attenuation
Relative to
Maximum Gain
(dB)
B11
(MSB)
B10
B9
B8
B7
B6
(LSB)
1
1
1
1
1
1
0
1
1
1
1
1
0
0.5
1
1
1
1
0
1
1.0
1
1
1
0
1
1
2.0
1
1
0
1
1
1
4.0
1
0
1
1
1
1
8.0
0
1
1
1
1
1
16.0
0
0
0
0
0
0
31.5
Table 4. Attenuation Logic Truth Table (DSA 2)
Attenuator Control Word (Channel 2)
Attenuation
Relative to
Maximum Gain
(dB)
B5
(MSB)
B4
B3
B2
B1
B0
(LSB)
1
1
1
1
1
1
0
1
1
1
1
1
0
0.5
1
1
1
1
0
1
1.0
1
1
1
0
1
1
2.0
1
1
0
1
1
1
4.0
1
0
1
1
1
1
8.0
0
1
1
1
1
1
16.0
0
0
0
0
0
0
31.5
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Table 5. SKY65186-11 Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Minimum
Maximum
Units
4.0
5.5
V
Supply voltage
AMP1_VCC, AMP2_VCC
RF input power
PIN
+14
dBm
Operating temperature
TC
–40
+85
°C
Storage temperature
TST
–65
+150
°C
Junction temperature
TJ
+150
°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.
Table 6. SKY65186-11 Recommended Operating Conditions
Parameter
Symbol
Minimum
Typical
Maximum
Units
Frequency range
f
330
2700
MHz
Supply voltage (AMP1_VCC, AMP2_VCC)
VCC
4.75
5.25
V
Serial port interface supply voltage
(SPI_VCC)
4.75
5.25
V
Control voltage, high level
(SPI_LE, SPI_DATA, SPI_CLK)
3.0
3.3
V
Operating current
ICC
220
mA
Table 7. SKY65186-11 Electrical Specifications (1 of 2) (Note 1)
(AMP1_VCC = AMP2_VCC = 5.0 V, TC = 25 °C, Attenuation = 0 dB, CW Input = –30 dBm, Unless Otherwise Noted)
Parameter
Symbol
Operating Frequency
(MHz)
Min
Typical
Max
Units
Small signal gain
|S21|
330 (Note 2)
400
700
900
1900
2700
13.6
13.6
13.0
13.5
13.3
13.0
dB
dB
dB
dB
dB
dB
Attenuation
Attn
330 (Note 2)
400
700
900
1900
2700
31.5
31.5
31.5
31.5
31.5
31.5
dB
dB
dB
dB
dB
dB
Attenuation step
Attn_STEP
330 (Note 2)
400
700
900
1900
2700
0.5
0.5
0.5
0.5
0.5
0.5
dB
dB
dB
dB
dB
dB
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Table 7. SKY65186-11 Electrical Specifications (2 of 2) (Note 1)
(AMP1_VCC = AMP2_VCC = 5.0 V, TC = 25 °C, Attenuation = 0 dB, CW Input = –30 dBm, Unless Otherwise Noted)
Parameter
Symbol
Operating Frequency
(MHz)
Min
Typical
Max
Attenuation step error
Attn_ERROR
330 (Note 2)
400
700
900
1900
2700
0.1 ± 0.5%
0.1 ± 0.5%
0.1 ± 0.5%
0.1 ± 0.5%
0.1 ± 0.5%
0.2 ± 0.5%
dB
dB
dB
dB
dB
dB
1 dB Output Compression Point
OP1dB
330 (Note 2)
400
700
900
1900
2700
+20.3
+20.3
+20.0
+20.3
+20.2
+19.5
dBm
dBm
dBm
dBm
dBm
dBm
3rd Order Output Intercept Point
(output power = 0 dBm, 1 MHz spacing)
OIP3
330 (Note 2)
400
700
900
1900
2700
+34.3
+36.8
+35.2
+36.4
+33.6
+32.0
dBm
dBm
dBm
dBm
dBm
dBm
Noise Figure
NF
330 (Note 2)
400
700
900
1900
2700
7.9
7.8
6.5
5.8
5.0
4.8
dB
dB
dB
dB
dB
dB
Input return loss
|S11|
330 (Note 2)
400
700
900
1900
2700
17.7
19.0
21.4
19.0
12.4
12.0
dB
dB
dB
dB
dB
dB
Output return loss
|S22|
330 (Note 2)
400
700
900
1900
2700
9.2
11.0
15.3
26.2
11.7
10.8
dB
dB
dB
dB
dB
dB
Quiescent current/amplifier
ICQ
No RF
105
mA
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: Performance at 330 MHz requires components C24 = C11 = 30 pF and components C25 = C10 = 2.2 pF.
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Typical Performance Characteristics @ 330 MHz
(VCC = 5 V, TC = +25 °C, Schematic Components C24 = C11 = 30 pF and C25 = C10 = 2.2 pF, Unless Otherwise Noted)
Figure 4. Gain vs Output Power Over Temperature
Figure 5. Current vs Output Power Over Temperature
Figure 6. Cascaded Performance, Attenuation Accuracy vs
Attenuation Setting (Spec: 0.1 + 5%)
Figure 7. OIP3 vs Output Power Over Temperature
(1 MHz Spacing)
Figure 8. Noise Figure vs Frequency Over Temperature
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Typical Performance Characteristics @ 400 MHz
(VCC = 5 V, TC = +25 °C, Unless Otherwise Noted)
Figure 9. Gain vs Output Power Over Temperature
Figure 10. Current vs Output Power Over Temperature
Figure 11. Cascaded Performance, Attenuation Accuracy vs
Attenuation Setting
Figure 12. OIP3 vs Output Power Over Temperature
(1 MHz Spacing)
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Typical Performance Characteristics @ 700 MHz
(VCC = 5 V, TC = +25 °C, Unless Otherwise Noted)
Figure 13. Gain vs Output Power Over Temperature
Figure 14. Current vs Output Power Over Temperature
Figure 15. Cascaded Performance, Attenuation Accuracy vs
Attenuation Setting
Figure 16. OIP3 vs Output Power Over Temperature
(1 MHz Spacing)
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Typical Performance Characteristics @ 900 MHz
(VCC = 5 V, TC = +25 °C, Unless Otherwise Noted)
Figure 17. Gain vs Output Power Over Temperature
Figure 18. Current vs Output Power Over Temperature
Figure 19. Cascaded Performance, Attenuation Accuracy vs
Attenuation Setting
Figure 20. OIP3 vs Output Power Over Temperature
(1 MHz Spacing)
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Typical Performance Characteristics @ 1900 MHz
(VCC = 5 V, TC = +25 °C, Unless Otherwise Noted)
Figure 21. Gain vs Output Power Over Temperature
Figure 22. Current vs Output Power Over Temperature
Figure 23. Cascaded Performance, Attenuation Accuracy vs
Attenuation Setting
Figure 24. OIP3 vs Output Power Over Temperature
(1 MHz Spacing)
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Typical Performance Characteristics @ 2700 MHz
(VCC = 5 V, TC = +25 °C, Unless Otherwise Noted)
Figure 25. Gain vs Output Power Over Temperature
Figure 26. Current vs Output Power Over Temperature
Figure 27. Cascaded Performance, Attenuation Accuracy vs
Attenuation Setting
Figure 28. OIP3 vs Output Power Over Temperature
(1 MHz Spacing)
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Evaluation Board Description
Package and Handling Information
The SKY65186-11 Evaluation Board is used to test the
performance of the SKY65186-11 VGA FEM. A schematic diagram
of the SKY65186-11 Evaluation Board is shown in Figure 29. An
assembly drawing for the Evaluation Board is shown in Figure 30
and the layer detail is provided in Figure 31. The layer detail
physical characteristics are noted in Figure 32.
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 SKY65186-11 requires DC blocking capacitors at the RF input
ports (pins 1 and 8). The RF output ports (pins 17 and 24) are
internally DC blocked. For applications operating from 330 MHz to
400 MHz, components C24 and C11 need to be populated with
30 pF capacitors and C25 and C10 need to be populated with
2.2 pF capacitors (see Figure 29).
The SKY65186-11 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 Skyworks Application Note, PCB
Design and SMT Assembly/Rework Guidelines for MCM-L
Packages, document number 101752.
Package Dimensions
The PCB layout footprint for the SKY65186-11 is provided in
Figure 33. Package dimensions for the 32-pin MCM are shown in
Figure 34, and tape and reel dimensions are provided in
Figure 35.
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.
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 29. SKY65186-11 Evaluation Board Schematic
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 30. SKY65186-11 Evaluation Board Assembly Drawing
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 31. SKY65186-11 Evaluation Board Layer Detail
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 32. Layer Detail Physical Characteristics
*** TBD ***
Figure 33. SKY65186-11 PCB Layout Footprint
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 34. SKY65186-11 32-Pin MCM Package Dimensions
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Figure 35. SKY65186-11 32-Pin MCM Tape and Reel Dimensions
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PRELIMINARY DATA SHEET • SKY65186-11 DUAL-CHANNEL VGA FEM
Ordering Information
Model Name
SKY65186-11 Dual-Channel VGA FEM
Manufacturing Part Number
SKY65186-11
Evaluation Board Part Number
TW18-D930-001
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