DATA SHEET
SKY73087-11: 700 – 1000 MHz High Gain and Linearity
Diversity Downconversion Mixer
Applications
•
2G/3G base station transceivers:
−
GSM/EDGE, CDMA, UMTS/WCDMA
•
Land mobile radio
•
High performance radio links
Description
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.
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.
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
•
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 #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
RFA
N/C
GND
VCC_LO
GND
VCC_LO
GND
N/C
RFB
VCC_RFB
N/C
GND
IFB+
IFB–
N/C
VCC_IFB
RIFB
N/C
Name
No connect
Ground
DC supply, +5 V
Ground
DC supply, +5 V
Ground
No connect
RF channel B input
DC supply, +5 V
No connect
Ground
IF channel B positive output
IF channel B negative output
No connect
DC supply, +5 V
IF channel B bias control
No connect
Description
RF channel A input
Pin #
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
LO1
GND
VCC_LOIN
GND
LO_SEL
GND
GND
GND
LO2
N/C
RIFA
VCC_IFA
N/C
IFA+
IFA–
GND
N/C
VCC_RFA
Name
Ground
DC supply, +5 V
Ground
Local oscillator switch select
Ground
Ground
Ground
Local oscillator #2 input
No connect
IF channel A bias control
DC supply, +5 V
No connect
IF channel A positive output
IF channel A negative output
Ground
No connect
DC supply, +5 V
Description
Local oscillator #1 input
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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April 7, 2011 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201043H
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 3
rd
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:
High
Low
State:
LO1 enabled
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
201043H • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • April 7, 2011
3
DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Table 2. SKY73087-11 Absolute Maximum Ratings
Parameter
Supply voltage, +5 V (VCC_LO, VCC_RFB,
VCC_IFB, VCC_LOIN, VCC_IFA, VCC_RFA)
Supply current
RF input power
LO input power
Operating case temperature
Junction temperature
Storage case temperature
VCC
I
CC
P
RF
P
LO
T
C
T
J
T
STG
–40
–40
0
Symbol
Minimum
4.5
Typical
5.0
370
Maximum
5.5
430
+20
+20
+85
+150
+150
Units
V
mA
dBm
dBm
°C
°C
°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. 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
Supply voltage, +5 V ((VCC_LO, VCC_RFB,
VCC_IFB, VCC_LOIN, VCC_IFA, VCC_RFA)
Supply current
RF frequency range
LO frequency range (Note 1)
IF frequency range
LO input power
LO select logic:
high
low
Operating case temperature
VCC
I
CC
F
RF
F
LO
F
IF
P
LO
LO_SEL
H
LO_SEL
L
T
C
700
800
100
–6
2.2
0.8
–40
+85
0
Symbol
Minimum
4.75
Typical
5.00
370
1000
1500
500
+6
Maximum
5.25
Units
V
mA
MHz
MHz
MHz
dBm
V
V
°C
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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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April 7, 2011 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201043H
DATA SHEET • SKY73087-11 DOWNCONVERSION MIXER
Table 4. SKY73087-11 Electrical Specifications (Note 1)
(Voltage Supply = +5 V, T
C
= +25
°C,
LO = 0 dBm, RF Frequency = 900 MHz, IF Frequency = 350 MHz, LO Frequency = 1250 MHz, Unless
Otherwise Noted)
Parameter
Conversion gain
G
Symbol
Test Condition
F
RF
= 824 to 940 MHz,
VCC = 4.75 to 5.25 V,
P
LO
= –3 to +3 dBm
F
RF
= 900 MHz
Blocking signal input
power = +8 dBm
F
RF
= 900 and 900.8 MHz,
P
RF
= –10 dBm/each tone,
VCC = 4.75 to 5.25 V,
P
LO
= –3 to +3 dBm
P
RF
= –10 dBm
P
RF
= –10 dBm
40
37
30
+23.5
Min
8.3
Typical
8.8
Max
Units
dB
Noise Figure
Noise Figure with a blocker signal
Third order input intercept point
NF
NF
BLK
IIP3
10.7
20.5
+25.3
12.2
25.0
dB
dB
dBm
2RF – 2LO
3RF – 3LO
Input 1 dB compression point
LO1 to LO2 isolation
Channel-to-channel isolation
RF to IF isolation
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
LO switching time
RF port input return loss
LO port input return loss
IF port input return loss
2x2
3x3
IP1dB
–62
–75
+12.7
57
42
47
–36
–25
–71
–73
–40
–20
+150
–53
–65
dBc
dBc
dBm
dB
dB
dB
–25
–20
–28
–28
–23
+250
1.0
dBm
dBm
dBm
dBm
dBm
µA
µs
dB
dB
dB
Z
IN
_
RF
Z
IN
_
LO
Z
OUT
_
IF
With external matching
components
With external matching
components
With external matching
components
14
14
14
Note 1:
Performance is guaranteed only under the conditions listed in this Table.
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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