201043H.pdf

DATA SHEET
SKY73087-11: 700 – 1000 MHz High Gain and Linearity
Diversity Downconversion Mixer
Applications
Description
• 2G/3G base station transceivers:
− GSM/EDGE, CDMA, UMTS/WCDMA
The SKY73087-11 is a fully integrated diversity mixer that
includes Local Oscillator (LO) drivers, an LO switch, high linearity
mixers, and large dynamic range Intermediate Frequency (IF)
amplifiers. Low loss RF baluns have also been included to reduce
design complications and lower system cost.
• Land mobile radio
• High performance radio links
Features
• Operating frequency range: 700 to 1000 MHz
• IF frequency range: 100 to 500 MHz
• Conversion gain: 8.8 dB
• Input IP3: +25.3 dBm
• Output IP3: +34.1 dBm
• Noise figure: 10.7 dB
• Integrated LO drivers
• Integrated low loss RF baluns
• High linearity IF amplifiers
The SKY73087-11 features an input IP3 of +25.3 dBm and a
Noise Figure (NF) of 10.7 dB, making the device an ideal solution
for high dynamic range systems such as 2G/3G base station
receivers. The LO switch provides more than 57 dB of isolation
between LO inputs and supports the switching time required for
GSM/EDGE base stations.
The SKY73087-11 is manufactured using a robust silicon BiCMOS
process and has been designed for optimum long-term reliability.
The SKY73087-11 diversity downconversion mixer is provided in a
compact, 36-pin Multi-Chip Module (MCM). 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.
• On-chip SPDT LO switch (greater than 60 dB LO-to-LO isolation)
• Small, MCM (36-pin, 6 x 6 mm) package (MSL3, 260 °C per
JEDEC J-STD-020)
Figure 1. SKY73087-11 Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201043H • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • April 7, 2011
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 2. SKY73087-11 Pinout – 36-Pin MCM
(Top View)
Table 1. SKY73087-11 Signal Descriptions
Pin #
Name
Description
Pin #
19
Name
LO1
Description
1
RFA
RF channel A input
Local oscillator #1 input
2
N/C
No connect
20
GND
Ground
3
GND
Ground
21
VCC_LOIN
DC supply, +5 V
4
VCC_LO
DC supply, +5 V
22
GND
Ground
5
GND
Ground
23
LO_SEL
Local oscillator switch select
6
VCC_LO
DC supply, +5 V
24
GND
Ground
7
GND
Ground
25
GND
Ground
8
N/C
No connect
26
GND
Ground
9
RFB
RF channel B input
27
LO2
Local oscillator #2 input
10
VCC_RFB
DC supply, +5 V
28
N/C
No connect
11
N/C
No connect
29
RIFA
IF channel A bias control
12
GND
Ground
30
VCC_IFA
DC supply, +5 V
13
IFB+
IF channel B positive output
31
N/C
No connect
14
IFB–
IF channel B negative output
32
IFA+
IF channel A positive output
15
N/C
No connect
33
IFA–
IF channel A negative output
16
VCC_IFB
DC supply, +5 V
34
GND
Ground
17
RIFB
IF channel B bias control
35
N/C
No connect
18
N/C
No connect
36
VCC_RFA
DC supply, +5 V
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Functional Description
The SKY73087-11 is a high gain diversity mixer, optimized for
base station receiver applications. The device consists of two
diversity channels, each consisting of a low loss RF balun, high
linearity passive mixer, and a low noise IF amplifier.
LO amplifiers are also included that allow the SKY73087-11 to
connect directly to the output of a Voltage Controlled Oscillator
(VCO). This eliminates the extra gain stages needed by most
discrete passive mixers. A Single Pole, Double Throw (SPDT)
switch has been included to select between two different LO
inputs for frequency hopping applications (i.e., GSM).
RF Baluns and Passive Mixer
The RF baluns provide a single ended input, which can easily be
matched to 50 Ω using a simple matching circuit. The RF baluns
offer very low loss and excellent amplitude and phase balance.
The high linearity mixer is a passive, double balanced mixer that
provides a very low insertion loss, and excellent 3rd Order Input
Insertion Point (IIP3) and linearity performance.
Additionally, the balanced nature of the mixer provides for
excellent port-to-port isolation.
LO Buffers and SPDT LO Switch
The LO buffers allow the input power of the SKY73087-11 to be
programmed in the range of –6 to +6 dBm. The LO section has
been optimized for high-side LO injection. However, the LO can be
driven over a wide frequency range with only slight degradation in
performance.
A high isolation SPDT switch allows the SKY73087-11 to be used
for frequency hopping applications. This switch provides greater
than 57 dB of LO1 to LO2 isolation:
LO_SEL Logic:
State:
High
LO1 enabled
Low
LO2 enabled
For applications that do not require frequency hopping, LO_SEL is
fixed to one state and the appropriate LO input is used.
IF Amplifier
The SKY73087-11 includes high dynamic range IF amplifiers that
follow the passive mixers in the signal path. The outputs require a
supply voltage connection using inductive chokes. These choke
inductors should be high-Q and have the ability to handle 200 mA
or greater.
A simple matching network allows the output ports to be matched
to a balanced 200 Ω impedance. The IF amplifiers are optimized
for IF frequencies between 100 and 500 MHz. The IF amplifiers
can be operated outside of this range, but with a slight
degradation in performance.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY73087-11 are provided
in Table 2. The recommended operating conditions are specified
in Table 3 and electrical specifications are provided in Table 4.
Spurious performance measurements for the 3GPP bands #20, 8,
and 5 are listed in Tables 5, 6, and 7, respectively.
Typical performance characteristics of the SKY73087-11 are
illustrated in Figures 3 through 43.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Table 2. SKY73087-11 Absolute Maximum Ratings
Parameter
Symbol
Supply voltage, +5 V (VCC_LO, VCC_RFB,
VCC_IFB, VCC_LOIN, VCC_IFA, VCC_RFA)
VCC
Supply current
ICC
RF input power
PRF
LO input power
PLO
Operating case temperature
TC
Junction temperature
TJ
Storage case temperature
TSTG
Minimum
Typical
Maximum
Units
4.5
5.0
5.5
V
370
430
mA
+20
dBm
0
+20
dBm
+85
°C
+150
°C
+150
°C
–40
–40
Notes: 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.
Nominal thermal resistance (junction to center ground pad) is 5.1 °C/W.
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. SKY73087-11 Recommended Operating Conditions (Note 1)
Parameter
Symbol
Minimum
Typical
Maximum
Units
4.75
5.00
5.25
V
700
1000
MHz
FLO
800
1500
MHz
FIF
100
500
MHz
LO input power
PLO
–6
+6
dBm
LO select logic:
high
low
LO_SELH
LO_SELL
2.2
0.8
V
V
Operating case temperature
TC
–40
+85
°C
Supply voltage, +5 V ((VCC_LO, VCC_RFB,
VCC_IFB, VCC_LOIN, VCC_IFA, VCC_RFA)
VCC
Supply current
ICC
RF frequency range
FRF
LO frequency range (Note 1)
IF frequency range
370
0
mA
Note 1: The SKY73087-11 has been optimized for high-side LO injection. However, the LO can be used outside of the specified frequency range with degraded performance.
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Table 4. SKY73087-11 Electrical Specifications (Note 1)
(Voltage Supply = +5 V, TC = +25 °C, LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 350 MHz, LO Frequency = 1250 MHz, Unless
Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typical
8.3
8.8
Max
Units
dB
Conversion gain
G
FRF = 824 to 940 MHz,
VCC = 4.75 to 5.25 V,
PLO = –3 to +3 dBm
Noise Figure
NF
FRF = 900 MHz
10.7
12.2
dB
Noise Figure with a blocker signal
NFBLK
Blocking signal input
power = +8 dBm
20.5
25.0
dB
Third order input intercept point
IIP3
FRF = 900 and 900.8 MHz,
PRF = –10 dBm/each tone,
VCC = 4.75 to 5.25 V,
PLO = –3 to +3 dBm
2RF – 2LO
2x2
PRF = –10 dBm
3RF – 3LO
3x3
PRF = –10 dBm
Input 1 dB compression point
IP1dB
LO1 to LO2 isolation
+23.5
40
+25.3
dBm
–62
–53
–75
–65
dBc
dBc
+12.7
dBm
57
dB
Channel-to-channel isolation
37
42
dB
RF to IF isolation
30
47
dB
LO leakage:
1xLO to RF port
2xLO to RF port
3xLO to RF port
4xLO to RF port
1xLO to IF port
LO_SEL input
–20
LO switching time
–36
–25
–71
–73
–40
–25
–20
–28
–28
–23
dBm
dBm
dBm
dBm
dBm
+150
+250
µA
1.0
µs
RF port input return loss
ZIN_RF
With external matching
components
14
dB
LO port input return loss
ZIN_LO
With external matching
components
14
dB
IF port input return loss
ZOUT_IF
With external matching
components
14
dB
Note 1: Performance is guaranteed only under the conditions listed in this Table.
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Table 5. SKY73087-11 Spurious Suppression Measurements, 3GPP Band #20 (Note 1)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
–50
–45
dBc
2RF – 1LO
2x1
PRF = –10 dBm
4RF – 3LO
4x3
PRF = 0 dBm
–89
–85
dBc
6RF – 4LO
6x4
PRF = 0 dBm
–110
–85
dBc
7RF – 5LO
7x5
PRF = 0 dBm
–115
–85
dBc
8RF – 6LO
8x6
PRF = 0 dBm
–114
–85
dBc
9RF –6LO
9x6
PRF = 0 dBm
–111
–85
dBc
10RF – 7LO
10x7
PRF = 0 dBm
–107
–85
dBc
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Table 6. SKY73087-11 Spurious Suppression Measurements, 3GPP Band #8 (Note 1)
Typical
Max
Units
4RF – 3LO
Parameter
4x3
Symbol
PRF = –3 dBm
Test Condition
Min
–86
–80
dBc
5RF – 4LO
5x4
PRF = –1.5 dBm
–102
–95
dBc
6RF – 4LO
6x4
PRF = 0 dBm
–109
–95
dBc
8RF – 6LO
8x6
PRF = 0 dBm
–114
–95
dBc
9RF – 6LO
9x6
PRF = +8.5 dBm
–112
–95
dBc
10RF –7LO
10x7
PRF = +7.5 dBm
–103
–95
dBc
11RF – 8LO
11x8
PRF = +9 dBm
–108
–95
dBc
12RF – 8LO
12x8
PRF = +10 dBm
–109
–95
dBc
12RF – 9LO
12x9
PRF = +8.5 dBm
–102
–95
dBc
13RF – 9LO
13x9
PRF = 0 dBm
–122
–95
dBc
14RF – 10LO
14x10
PRF = +9 dBm
–118
–95
dBc
15RF – 10LO
15x10
PRF = +11.5 dBm
–115
–95
dBc
15RF – 11LO
15x11
PRF = 0 dBm
–119
–95
dBc
16RF – 11LO
16x11
PRF = +11.5 dBm
–112
–95
dBc
16RF – 12LO
16x12
PRF = +11 dBm
–108
–95
dBc
17RF – 12LO
17x12
PRF = +11.5 dBm
–117
–95
dBc
18RF – 13LO
18x13
PRF = +12 dBm
–109
–95
dBc
19RF – 13LO
19x13
PRF = +12 dBm
–116
–95
dBc
20RF – 14LO
20x14
PRF = +12 dBm
–114
–95
dBc
21RF – 15LO
21x15
PRF = +12 dBm
–118
–95
dBc
22RF – 15LO
22x15
PRF = +12 dBm
–121
–95
dBc
23RF – 17LO
23x17
PRF = +12 dBm
–127
–95
dBc
Note 1: Performance is guaranteed only under the conditions listed in this Table.
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Table 7. SKY73087-11 Spurious Suppression Measurements, 3GPP Band #5 (Note 1)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
–48
–45
dBc
2RF – 1LO
2x1
PRF = –10 dBm
4RF – 3LO
4x3
PRF = +5 dBm
–80
–95
dBc
6RF – 4LO
6x4
PRF = +5 dBm
–108
–95
dBc
7RF – 5LO
7x5
PRF = +5 dBm
–102
–95
dBc
8RF – 6LO
8x6
PRF = +5 dBm
–108
–95
dBc
9RF –6LO
9x6
PRF = +5 dBm
–116
–95
dBc
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Typical Performance Characteristics
(Voltage Supply = +5 V, TC = +25 °C, LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 350 MHz, LO Frequency = 1250 MHz, Unless
Otherwise Noted)
Figure 3. Mixer A Conversion Gain vs Frequency and Supply
Voltage
Figure 4. Mixer B Conversion Gain vs Frequency and Supply
Voltage
Figure 5. Mixer A Conversion Gain vs Frequency and Temperature
Figure 6. Mixer B Conversion Gain vs Frequency and Temperature
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 7. Mixer A Conversion Gain vs Frequency and LO Power
Figure 8. Mixer B Conversion Gain vs Frequency and LO Power
Figure 9. Mixer A Noise Figure vs Frequency and Supply Voltage
Figure 10. Mixer B Noise Figure vs Frequency and Supply Voltage
Figure 11. Mixer A Noise Figure vs Frequency and Temperature
Figure 12. Mixer B Noise Figure vs Frequency and Temperature
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 13. Mixer A Noise Figure vs Frequency and LO Power
Figure 14. Mixer B Noise Figure vs Frequency and LO Power
Figure 15. Mixer A GSM850 Band IIP3 vs Frequency and Supply
Voltage
Figure 16. Mixer A EGSM900 Band IIP3 vs Frequency and Supply
Voltage
Figure 17. Mixer B GSM850 Band IIP3 vs Frequency and Supply
Voltage
Figure 18. Mixer B EGSM900 Band IIP3 vs Frequency and Supply
Voltage
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 19. Mixer A GSM850 Band IIP3 vs Frequency and
Temperature
Figure 20. Mixer A EGSM900 Band IIP3 vs Frequency and
Temperature
Figure 21. Mixer B GSM850 Band IIP3 vs Frequency and
Temperature
Figure 22. Mixer B EGSM900 Band IIP3 vs Frequency and
Temperature
Figure 23. Mixer A GSM850 Band IIP3 vs Frequency and LO
Power
Figure 24. Mixer A EGSM900 Band IIP3 vs Frequency and LO
Power
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 25. Mixer B GSM850 Band IIP3 vs Frequency and LO
Power
Figure 26. Mixer B EGSM900 Band IIP3 vs Frequency and LO
Power
Figure 28. Mixer B 2RF–2LO vs Frequency and Temperature
Figure 27. Mixer A 2RF–2LO vs Frequency and Temperature
Figure 29. Mixer A 3RF–3LO vs Frequency and Temperature
Figure 30. Mixer B 3RF–3LO vs Frequency and Temperature
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 31. Mixer A IP1dB vs Frequency and Temperature
Figure 32. Mixer B IP1dB vs Frequency and Temperature
Figure 33. Mixer A IP1dB vs Frequency and Supply Voltage
Figure 34. Mixer B IP1dB vs Frequency and Supply Voltage
Figure 35.Mixer A IP1dB vs Frequency and LO Power
Figure 36. Mixer B IP1dB vs Frequency and LO Power
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 37. Mixer A & B Channel-to-Channel Isolation vs
Frequency and Temperature
Figure 38. Mixer A LO to IF Leakage vs Frequency and
Temperature
Figure 39. Mixer B LO to IF Leakage vs Frequency and
Temperature
Figure 40. Mixer A LO to RF Leakage vs Frequency and
Temperature
Figure 41. Mixer B LO to RF Leakage vs Frequency and
Temperature
Figure 42. Mixer A RF to IF Isolation vs Frequency and
Temperature
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 43.Mixer B RF to IF Isolation vs Frequency and Temperature
Evaluation Board Description
Package Dimensions
The SKY73087-11 Evaluation Board is used to test the
performance of the SKY73087-11 downconversion mixer. An
assembly drawing for the Evaluation Board is shown in Figure 44
and the layer detail is provided in Figure 45. A schematic diagram
of the SKY73087-11 Evaluation Board is shown in Figure 46.
The PCB layout footprint for the SKY73087-11 is provided in
Figure 47. Figure 48 shows the package dimensions for the
36-pin MCM and Figure 49 provides the tape and reel dimensions.
Circuit Design Considerations
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 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 SKY73087-11 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.
3. Skyworks recommends including external bypass capacitors
on the VCC voltage inputs of the device.
4. Components L5, L6, L14, and L15 (see Figure 46) are high-Q
low loss inductors. These inductors must be able to pass
currents in excess of 200 mA DC.
Package and Handling Information
THE SKY73087-11 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.
5. Components R1 and R2 (see Figure 46) set the bias current for
the IF amplifiers. Skyworks recommends that these resistors
have a tolerance of ±1% to optimize performance consistency
of the SKY73087-11. These resistors are not required for the
Evaluation Board to operate as specified in Tables 3 through 6.
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 44. SKY73087-11 Evaluation Board Assembly Diagram
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 45. SKY73087-11 Evaluation Board Layer Detail
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 46. SKY73087-11 Evaluation Board Schematic
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 47. PCB Layout Footprint for the SKY73087-11 6 x 6 mm MCM
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 48. SKY73087-11 36-Pin MCM Package Dimensions
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Figure 49. SKY73087-11 Tape and Reel Dimensions
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DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Ordering Information
Model Name
SKY73087-11 700-1000 MHz Downconversion Mixer
Manufacturing Part Number
SKY73087-11
Evaluation Board Part Number
TW17-D870
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Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by
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information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to
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Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury,
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damages resulting from such improper use or sale.
Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of
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Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands
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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201043H • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • April 7, 2011
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