200955C.pdf

DATA SHEET
SKY65127-11: 700-800 MHz High Linearity, 2 W Power
Amplifier
Applications
• WCDMA, CDMA, TDMA, GSM, LTE systems
• Repeaters
• WLL and ISM band transmitters
• Mobile radios
• Femtocell base stations
Features
• High linearity: OIP3 > +47 dBm
• OP1dB = +32.5 dBm
• ACLR = –45 dBc for POUT = +25 dBm
• High efficiency: PAE = 38%
• High gain = 36.5 dB
• Internal RF match and bias circuits
• Single DC supply: 5 V
• MCM (20-pin, 6 x 6 mm) package (MSL3, 260 °C per
JEDEC J-STD-020)
Figure 1. SKY65127-11 Block Diagram
Description
Skyworks SKY65127-11 is a fully-matched, surface mount Power
Amplifier (PA) designed for WCDMA, CDMA, TDMA, GSM, and LTE
radio, repeaters, transmitters, mobile radios, and femtocell base
station applications operating in the 700 to 800 MHz bandwidth.
All active circuitry in the module is contained in a single GaAs
Microwave Monolithic Integrated Circuit (MMIC). The device is
manufactured using Skyworks AlGaAs Heterojunction Bipolar
Transistor (HBT) process, which allows for single supply operation
while maintaining high efficiency and good linearity.
A block diagram of the SKY65127-11 is shown in Figure 1. The
device package and pinout for the 20-pin MCM are shown in
Figure 2.
Figure 2. SKY65127-11 Pinout – 20-Pin MCM
(Top View)
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Table 1. SKY65127-11 Signal Descriptions
Pin #
Description
Pin #
Name
Description
1
GND
Ground
11
VCC2
Stage 2 collector voltage
2
GND
Ground
12
N/C
No connection
3
GND
Ground
13
VCC1
Stage 1 collector voltage
4
VC_BIAS
Bias voltage
14
N/C
No connection
5
N/C
No connection
15
N/C
No connection
6
VREF1
Bias reference voltage 1
16
RF_IN
RF input
7
VREF2
Bias reference voltage 2
17
GND
Ground
8
GND
Ground
18
N/C
No connection
9
RF_OUT
RF output
19
GND
Ground
GND
Ground
20
GND
Ground
10
Note:
Name
The center ground pad must have a low inductance and low thermal resistance connection to the application’s printed circuit board ground plane.
Table 2. SKY65127-11 Absolute Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Units
RF input power
PIN
0
dBm
Supply voltage (VCC1, VCC2, VC_BIAS,
VREF1, VREF2)
VCC
6
V
Operating temperature
TC
–40
+85
°C
Storage temperature
TST
–55
+125
°C
Junction temperature
TJ
+150
°C
Power dissipation
PD
3
W
Thermal resistance
ΘJC
17
°C/W
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.
Technical Description
The SKY65127-11 PA contains two amplifier stages. The
matching circuits for the input stage, interstage, and output stage
are contained within the device. An on-chip active bias circuit is
included within the device for both input and output stages, which
provides excellent gain tracking over temperature and voltage
variations.
The SKY65127-11 is internally matched for optimum linearity and
efficiency. The input and output stages are independently supplied
using the VCC1 and VCC2 supply lines (pins 13 and 11,
respectively). The bias reference voltages for stages 1 and 2 are
supplied using common lines VREF1 and VREF2 (pins 6 and 7,
respectively). The DC control voltage that sets the bias to stages 1
and 2 is supplied by the VC_BIAS signal (pin 4).
Electrical and Mechanical Specifications
Signal pin assignments and functional pin descriptions are
described in Table 1. The absolute maximum ratings of the
SKY65127-11 are provided in Table 2. Recommended operating
conditions are specified in Table 3 and electrical specifications are
provided in Table 4.
Typical performance characteristics are shown in Figures 3
through 14.
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Table 3. SKY65127-11 Recommended Operating Conditions
Parameter
Symbol
Minimum
Supply voltage (VCC1, VCC2, VC_BIAS,
VREF1, VREF2)
VCC
Operating frequency
f
730
Operating temperature
TC
–40
Typical
Maximum
Units
5
V
+25
770
MHz
+85
°C
Table 4. SKY65127-11 Electrical Specifications (Note 1)
(VCC1 = VCC2 = VREF1 = VREF2 = VC_BIAS = 5 V, f = 750 MHz, TC = +25 °C, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typical
730
Max
Units
770
MHz
Frequency
f
Small signal gain
|S21|
PIN = –15 dBm
35.0
36.5
dB
Input return loss
|S11|
PIN = –15 dBm
8.5
9.6
dB
Output return loss
|S22|
PIN = –15 dBm
9
12
dB
1 dB Output Compression Point
OP1dB
CW
3rd Order Output Intercept Point
OIP3
POUT/tone = +25 dBm,
tone spacing = 1 MHz
Noise Figure
NF
CW
Adjacent Channel Leakage Ratio
@ POUT = +25 dBm
ACLR1
Adjacent Channel Leakage Ratio
@ POUT = +25 dBm
+47
+32.5
dBm
+48
dBm
4.4
6.0
dB
WCDMA test model #1:
64 DPCH, 5 MHz offset
–46.0
–45.0
dBc
ACLR2
WCDMA test model #1:
64 DPCH, 10 MHz offset
–63.5
–55.0
dBc
Power Added Efficiency
PAE
CW, POUT @ OP1dB
Quiescent Current
ICCQ
No RF signal
35
38
%
270
mA
Note 1: Performance is guaranteed only under the conditions listed in this Table.
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Typical Performance Characteristics
(VCC1 = VCC2 = VREF1 = VREF2 = VC_BIAS = 5 V, f = 750 MHz, TC = +25 °C, Unless Otherwise Noted)
Figure 3. Small Signal Gain vs Frequency Over Temperature
Figure 4. Gain vs Output Power Over Temperature
(f = 750 MHz)
Figure 5. Input Return Loss vs Frequency Over Temperature
Figure 6. Output Return Loss vs Frequency Over Temperature
Figure 7. OIP3 vs Output Power Over Frequency
(Δf = 1 MHz Spacing)
Figure 8. OIP3 vs Output Power Over Temperature
(Δf = 1 MHz Spacing)
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Figure 9. ACLR vs Output Power Over Frequency
(WCDMA Test Model 1 w/64 DPCH @ 5 MHz Offset)
Figure 10. ACLR vs Output power Over Frequency
(WCDMA Test Model 1 w/64 DPCH @ 10 MHz Offset)
Figure 11. Noise Filter vs Frequency Over Voltage
Figure 12. Noise Figure vs Frequency Over Temperature
Figure 13. Current vs Output Power Over Frequency
Figure 14. Current vs Output Power Over Temperature
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Evaluation Board Description
The SKY65127-11 Evaluation Board is used to test the
performance of the SKY65127-11 PA. An Evaluation Board
schematic diagram is provided in Figure 15. Table 5 provides the
Bill of Materials (BOM) list for Evaluation Board components.
An assembly drawing for the Evaluation Board is shown in
Figure 16. An Evaluation Board layer detail drawing is shown in
Figure 17. Layer detail physical characteristics are noted in
Figure 18.
Circuit Design Considerations
The following design considerations are general in nature and
must be followed regardless of final use or configuration:
1. Paths to ground should be made as short as possible.
2. The ground pad of the SKY65127-11 has special electrical and
thermal grounding requirements. This pad is the main thermal
conduit for heat dissipation. Since the circuit board acts as the
heat sink, it must shunt as much heat as possible from the
device. Therefore, design the connection to the ground pad to
dissipate the maximum wattage produced by the circuit board.
Multiple vias to the grounding layer are required.
NOTE: A poor connection between the slug and ground increases
junction temperature (TJ), which reduces the lifetime of the
device.
Evaluation Board Test Procedure
Step 1: Connect RF test equipment to the input/output SMA
connectors.
Step 2: Connect DC ground.
Step 3: Connect all VCC, VREF, and VC_BIAS lines to a +5 V
supply. Verify that the ICCQ current is approximately
270 mA.
Step 4: Apply RF signal data at –20 dBm and observe that the
output level is approximately +16.5 dBm or that the gain
of the device is approximately 36.5 dB.
NOTE: It is important to adjust the VCC1 and VCC2 voltage sources
so that +5 V is measured at the board. High collector
currents drop the collector voltage significantly if long leads
are used. Adjust the bias voltage to compensate.
Figure 15. SKY65127-11 Evaluation Board Schematic
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Table. 5. SKY65127-11 Evaluation Board Bill of Materials (BOM)
Component
Value
Size
Product #
Manufacturer
Manufacturer’s Part #
Characteristics
C1, C6, C11
3300 pF
0603
SK204-000-007
Murata
GRM188R71H332KA01D
X7R, 50 V, ±10%
C2, C3, C7,
C10
68 pF
0603
540R23-023
Murata
GRM1885C1H680JA01D
COG, 50 V, ±5%
C8, C12, C13
10 μF
1206
5404R91-005
TDK
C3216X5R0J106KT
X5R, 6 V, ±10%
R1
360 Ω
0603
5424R20-038
Rohm
MCR03EZHUJ360
50 V, 0.063 W, ±5%
R2
330 Ω
0603
5424R20-037
Rohm
MCR03EZHUF330
50 V, 0.063 W, ±5%
Figure 16. Evaluation Board Assembly Drawing
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Figure 17. Evaluation Board Layer Detail
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Figure 18. Layer Detail Physical Characteristics
Application Circuit Notes
Center Ground. It is extremely important to sufficiently ground the
bottom ground pad of the device for both thermal and stability
reasons. Multiple small vias are acceptable and will work well
under the device if solder migration is an issue.
GND (pins 1, 2, 3, 8, 10, 17, 19, and 20). Attach all ground pins
to the RF ground plane with the largest diameter and lowest
inductance via that the layout allows. Multiple small vias are
acceptable and will work well under the device if solder migration
is an issue.
N/C (pins 5, 12, 14, 15, and 18). These pins are open and may
or may not be connected to ground.
VC_BIAS (pin 4). The bias supply voltage for stages 1 and 2,
typically set to +5 V.
VREF1 (pin 6). Bias reference voltage for amplifier stage 1. This
signal should be operated over the same voltage range as VCC
with a nominal voltage of +5 V.
VREF2 (pin 7). Bias reference voltage for amplifier stage 2. This
signal should be operated over the same voltage range as VCC
with a nominal voltage of +5 V.
RF_OUT (pin 9). Amplifier RF output pin (ZO = 50 Ω). The module
includes an onboard internal DC blocking capacitor. All impedance
matching is provided internal to the module.
VCC2 (pin 11). Supply voltage for the output (final) stage collector
bias (typically +5 V). To bypass VCC2, capacitors C10, C11, and
C12 (see Figure 15) should be placed in the approximate location
shown on the Evaluation Board, although exact placement is not
critical.
VCC1 (pin 13). Supply voltage for the first stage collector bias
(typically +5 V). To bypass VCC1, capacitors C6, C7, and C8 (see
Figure 15) should be placed in the approximate location shown on
the Evaluation Board, although exact placement is not critical.
RF_IN (pin 16). Amplifier RF input pin (ZO = 50 Ω). The module
includes an onboard internal DC blocking capacitor. All impedance
matching is provided internal to the module.
Package Dimensions
The PCB layout footprint for the SKY65152-11 is shown in
Figure 35. Typical case markings are shown in Figure 36.
Package dimensions for the 20-pin MCM are shown in Figure 37,
and tape and reel dimensions are provided in Figure 38.
Package and Handling Information
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 SKY65127-11 is rated to Moisture Sensitivity Level 3 (MSL3)
at 250 °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.
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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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Figure 19. SKY65127-11 PCB Layout Footprint
Figure 20. SKY65127-11 Typical Case Markings
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Figure 21. SKY65127-11 20-Pin MCM Package Dimensions
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Figure 22. SKY65127-11 20-Pin MCM Tape and Reel Dimensions
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DATA SHEET • SKY65127-11 700-800 MHZ HIGH LINEARITY PA
Ordering Information
Model Name
SKY65127-11 700-800 MHz High Linearity Power
Amplifier
Manufacturing Part Number
SKY65127-11
Evaluation Board Part Number
TW17-D510-001
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