201316A.pdf

PRELIMINARY DATA SHEET
IFA+
Applications
 2G/3G base station transceivers:
 GSM/EDGE, CDMA, UMTS/WCDMA
 Land mobile radio
 ISM band transceivers
 High performance radio links
 RF identification
IFA–
SKY73090-21: 1700 – 2200 MHz High Gain and Linearity
Diversity Downconversion Mixer With Power-Down Mode
RFA
LO1
LO_SEL
(Switch Enable)
Features
 Operating frequency range: 1700 to 2200 MHz
 IF frequency range: 50 to 500 MHz
 Conversion gain: 8.7 dB
 Input IP3: +24.2 dBm
 Output IP3: +32.8 dBm
 Noise figure: 9.4 dB
 Power-down mode
 Integrated LO drivers
 Integrated low loss RF baluns
 High linearity IF amplifiers
 On-chip SPDT LO switch (greater than 40 dB LO-to-LO isolation)
 Small, MCM (36-pin, 6 x 6 mm) package (MSL3, 260 C per
JEDEC J-STD-020)
LO2
RFB
PWRDN
IFB+
IFB–
S2027
Figure 1. SKY73090-21 Block Diagram
Description
The SKY73090-21 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.
The SKY73090-21 features an input IP3 of +24.2 dBm and a
Noise Figure (NF) of 9.4 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 40 dB of isolation
between LO inputs and supports the switching time required for
GSM/EDGE base stations.
The SKY73090-21 is manufactured using a robust silicon BiCMOS
process and has been designed for optimum long-term reliability.
The SKY73090-21 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.
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1
VCC7
N/C
GND
IFA–
IFA+
N/C
VCC6
RIFA
N/C
PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
36
35
34
33
32
31
30
29
28
3
25
GND
VCC1
4
24
GND
GND
5
23
LO_SEL
VCC2
6
22
PWRDN
GND
7
21
VCC5
N/C
8
20
GND
RFB
9
19
LO1
10
11
12
13
14
15
16
17
18
N/C
GND
RIFB
GND
VCC4
26
N/C
2
IFB–
N/C
IFB+
LO2
GND
27
N/C
1
VCC3
RFA
S1916
Figure 2. SKY73090-21 Pinout – 36-Pin MCM
(Top View)
Table 1. SKY73090-21 Signal Descriptions
Pin #
Name
Description
Pin #
Name
Description
1
RFA
RF channel A input
19
LO1
Local oscillator #1 input
2
N/C
No connect
20
GND
Ground
3
GND
Ground
21
VCC5
DC supply, +5 V
4
VCC1
DC supply, +5 V
22
PWRDN
Power-down mode enable
5
GND
Ground
23
LO_SEL
Local oscillator switch select
6
VCC2
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
VCC3
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
VCC6
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
VCC4
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
VCC7
DC supply, +5 V
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
Functional Description
The SKY73090-21 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.
The SKY73090-21 also includes a power-down feature used to
lower the supply current for standby operation.
LO amplifiers are also included that allow the SKY73090-21 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).
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 SKY73090-21 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  impedance. The IF amplifiers are
optimized for IF frequencies between 40 and 250 MHz. The IF
amplifiers can be operated outside of this range, but with a
slight degradation in performance.
RF Baluns and Passive Mixer
The RF baluns provide a single ended input, which can easily be
matched to 50  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.
Addtionally, the balanced nature of the mixer provides for
excellent port-to-port isolation.
LO Buffers and SPDT LO Switch
Power-Down Mode
The SKY73090-21 also includes a low current power-down
mode controlled by pin 22 (PWRDN). When this pin is at a logic
high level, the power-down function is enabled with the total
mixer current under 1 μA.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY73090-21 are
provided in Table 2. The recommended operating conditions are
specified in Table 3 and electrical specifications are provided in
Table 4.
The LO buffers allow the input power of the SKY73090-21 to be
programmed in the range of –6 to +6 dBm. The LO section has
been optimized for low-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 SKY73090-21 to be
used for frequency hopping applications. This switch provides
greater than 55 dB of LO1 to LO2 isolation:
LO_SEL Logic:
State:
High
LO1 enabled
Low
LO2 enabled
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
Table 2. SKY73090-21 Absolute Maximum Ratings
Parameter
Symbol
Supply voltage, +5 V (VCC1 – VCC7)
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
0
–40
–40
420
mA
+20
dBm
+20
dBm
+85
C
+150
C
+125
C
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.
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. SKY73090-21 Recommended Operating Conditions
Parameter
Symbol
Minimum
Typical
Maximum
Units
RF frequency range
FRF
1700
2200
MHz
LO frequency range (Note 1)
FLO
1750
2700
MHz
IF frequency range
FIF
50
350
500
MHz
4.75
5.00
5.25
Supply voltage, +5 V (VCC1 – VCC7)
VCC
Supply current
ICC
LO input power
PLO
Logic levels (LO_SEL, PWRDN):
high
low
Operating case temperature
364
–6
0
+6
dBm
0.8
V
V
+85
C
2.2
TC
–40
Note 1: The SKY73090-21 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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V
mA
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
Table 4. SKY73090-21 Electrical Specifications (Note 1)
(Voltage Supply = +5 V, TC = +25 C, LO = 0 dBm, RF Frequency = 2020 MHz, IF Frequency = 350 MHz, LO Frequency = 2370 MHz,
PWRDN = 0, Unless Otherwise Noted)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
Conversion gain
G
8.7
dB
Noise Figure
NF
9.4
dB
Noise Figure with a blocker signal
NFBLK
Blocking signal input
power = +8 dBm
Third order input intercept point
IIP3
Tone space = 800 kHz,
input tone power =
–10 dBm
+24.2
dBm
Third order output intercept point
OIP3
Tone space = 800 kHz,
input tone power =
–10 dBm
+32.8
dBm
2RF – 2LO
2x2
PRF = –10 dBm
–62
dBc
3RF – 3LO
3x3
PRF = –10 dBm
Input 1 dB compression point
IP1dB
Output 1 dB compression point
OP1dB
25
dB
–70
–80
dBc
+9.5
+13.3
dBm
+20.8
dBm
LO1 to LO2 isolation
30
39
dB
Channel-to-channel isolation
40
52
dB
RF to IF isolation
30
62
dB
LO leakage @ IF port
–23
–44
dBm
LO leakage:
1xLO @ RF
2xLO @ RF
3xLO @ RF
4xLO @ RF
–25
–25
–28
–28
–28
–30
–78
–84
dBm
dBm
dBm
dBm
–85
–85
–107
–108
dBc
dBc
Spurious measurements:
6RF-5LO
8RF-7LO
PIN = 0 dBm
6x5
8x7
LO switching time (Note 2)
Power-down current (Note 2) (Note 3)
IOFF
PWRDN = 1
0.1
Power-down/up time (Note 2)
Logic input current (Note 2)
–20
+150
1
μs
1.0
μA
1
μs
+250
μA
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: Characterized and guaranteed by design; not tested in production.
Note 3: Power-down functionality tested in production. Power-down current (IOFF) production-tested to be < 1 mA.
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
Evaluation Board Description
Package Dimensions
The SKY73090-21 Evaluation Board is used to test the
performance of the SKY73090-21 downconversion mixer. An
assembly drawing for the Evaluation Board is shown in Figure 3
and the layer detail is provided in Figure 4. A schematic diagram
of the SKY73090-21 Evaluation Board is shown in Figure 5.
The PCB layout footprint for the SKY73090-21 is provided in
Figure 6. Figure 7 shows the package dimensions for the 36-pin
MCM and Figure 8 provides the tape and reel dimensions.
Package and Handling Information
Circuit Design Configurations
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 SKY73090-21 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 5) are high-Q
low loss inductors. These inductors must be able to pass
currents in excess of 200 mA DC.
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 SKY73090-21 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 5) set the bias current for
the IF amplifiers. Skyworks recommends that these resistors
have a tolerance of 1% to optimize performance consistency
of the SKY73090-21. These resistors are not required for the
Evaluation Board to operate as specified in Tables 3 and 4.
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
J5
J7
C29
C34 C35
L16 L17
R4
C28
L13 L12
T2
J3
J1
C33
C32
L14
C38
C26
C39
R5
C27
C25
R2
L11
C3
C2
L1
L15
C1
L2
C4
L4
C5
C23
C21
C20
L3
C18
C17
C8
C6
C24
C7
C41
L5
L6
C12
R1
C14
R6
C13
C11
C22 R10
R7
C42
R9
R8
L10
C19
C40
T1
J2
J4
R3
L18
J8
L8
L19
C36 C37
P1
C15
L9
C16
J6
S1037
Figure 3. SKY73090-21 Evaluation Board Assembly Diagram
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
Layer 1: Top – Metal
Layer 2: Ground
Layer 3: Power Plane
Layer 4: Solid Ground Plane
S1038
Figure 4. SKY73090-21 Evaluation Board Layer Detail
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
R4
0Ω
DB714
L14
470 nH
L13
0Ω
T2
C29
15 pF
L15
470 nH
VCC
L12
0Ω
J5
C28
DNI
C27
33 pF
C28
1 μF
VCC
R2
DNI
5
6
7
J7
L3
0Ω
L4
6.8 nH
C8
0Ω
C7
0.4 pF
x
8
9
N/C
N/C
IFA+
IFA–
N/C
GND
28
LO2
N/C
GND
GND
GND
GND
VCC1
SKY73090-21
GND
LO_SEL
VCC2
PWRDN
VCC5
GND
N/C
GND
RFB
LO1
10
11
12
13
14
15
×
16
×
17
L11
0Ω
27
26
J8
C23
33 pF
25
Element Jumper
VCC
24
C22
12 pF
23
22
Power-Down
Enable
21
C20
1 μF
20
19
N/C
VCC
29
RIFB
4
×
30
VCC4
3
31
N/C
2
32
IFB–
x
RFA
33
IFB+
C3
0.4 pF
1
×
34
GND
C1
0Ω
N/C
L2
6.8 nH
VCC7
L1
0Ω
VCC3
J4
35
RIFA
×
36
VCC6
VCC
VCC
L10
0Ω
J3
C17
33 pF
18
R1
DNI
×
VCC
L5
470 nH
VCC
C14
33 pF
C13
1 μF
L9
0Ω
VCC
L6
470 nH
Note: The SKY73090-21 Evaluation Board can be converted to
provide a differential output by removing components
T1, T2, R3, and R4.
C15
15 pF
T1
DB714
L8
0Ω
J6
C16
DNI
R3
0Ω
Some component labels may be different than the
corresponding component symbol shown here.
Component values, however, are accurate as of the
date of this Data Sheet.
S2032
Figure 5. SKY73090-21 Evaluation Board Schematic
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
6.3
0.4
Component Outline
0.25
0.075
0.15
0.075
0.75 0.9
12X 0.062
Stencil and
Metallization
6.3
36X 0.875
Component Outline
Solder Mask Opening
24X 0.125
SMT Pad Detail
Scale: 2X
9X This Rotation
9X Rotated 180o
9X Rotated 90o CW
9X Rotated 90o CCW
Stencil aperture size for center
ground pads should be 80% to
100% (by area) of the solder
mask opening of the package.
12X 0.063
24X 0.125
36X 0.875
Stencil Aperture
Top View
6.3
Pin 36
6.45
2X 2.775
3.88
Pin 1
2X 2.775
6.45
6.3
3.88
0.5
Pitch
Typ
0.25 Typ
Component Outline
Metallization
Top View
Note: The cross-hatched area represents the merger of the center
ground pad +9 individual I/O ground pads. All I/O ground
pads should have at least one via connected to internal ground
planes for optimum electrical performance.
Component Outline
Solder Mask Opening
Thermal Via Array.
∅0.3 mm on 0.6 mm pitch.
Top View
Additional vias in common ground
pad will improve thermal and electrical
performance. NOTE: thermal vias
should be tented and filled with solder
mask, 30-35 μm Cu plating recommended.
All measurements are in millimeters
S1125
Figure 6. PCB Layout Footprint for the SKY73090-21 6 x 6 mm MCM
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
18X 2.9
Pin 1 Indicator
C
Pin 36
4X 2
B
6
Pin 1 Indicator
(See Detail D)
Pin 1
4X 1.5
4X 0.5
4X 1
A
4X 2
4X 1
4X 1.5
6
4X 0.5
2X 1.9
18X 2.9
36x SMT Pad
0.15 A B C
1.05 ± 0.1
A
3X R0.2
2X 1.9
0.1
0.15 A B C
Top View
Side View
Bottom View
Solder Mask Opening
0.2 A B C
0.5 ± 0.1
0.2 x 0.2
(0.1)
0.25 ± 0.05
0.4 ± 0.05
Detail D
Metal Pad Edge
All measurements are in millimeters
Detail A
Pads are solder mask defined on one edge and metal
defined on three edges.
Dimensioning and tolerancing according to ASME Y14.5M-1994
S689_C
Figure 7. SKY73090-21 36-Pin MCM Package Dimensions
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PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
∅1.50 ± 0.10
0.25 ± 0.02 (T)
4.00 ± 0.10
2.00 ± 0.10
1.75 ± 0.10
6.35 ± 0.10 (Bo)
A
A
B
1.30 ± 0.10 (Ko)
12.00 ± 0.20
B
5.50 ± 0.10
Pin #1 Indicator
(see Notes)
∅1.55 ± 0.05
8.00 ± 0.10
B
6.35 ± 0.10 (Ao)
Notes:
1. Carrier tape: black conductive polycarbonate
2. Cover tape material: transparent conductive PSA
3. Cover tape size: 9.3 mm width
4. All dimensions are in millimeters
5. Pin 1 orientation is in top left corner for the following Skyworks products:
A
SKY73022-21, -31
SKY73023-21, -31
For all other 6 x 6 mm MCM/RFLGA products, pin 1 orientation is
in top right corner.
Figure 8. SKY73090-21 Tape and Reel Dimensions
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S1850
PRELIMINARY DATA SHEET • SKY73090-21 DOWNCONVERSION MIXER
Ordering Information
Model Name
SKY73090-21 1700 – 2200 MHz Downconversion Mixer
with Power-Down Mode
Manufacturing Part Number
SKY73090-21
Evaluation Board Part Number
*** TBD ***
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DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS
SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION,
LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
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,
death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any
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
products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for
applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.
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
and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com,
are incorporated by reference.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201316A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • June 21, 2010
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