DATA SHEET
SKY65385-11: 791 to 821 MHz Variable Gain Amplifier
Applications
WCDMA base stations
Femto cells
Description
Skyworks SKY65385-11 is a high linearity, Variable Gain Amplifier
(VGA) module. The device includes an input amplifier driver, a
Variable Voltage Attenuator (VVA), and an output Power Amplifier
(PA). The two amplifiers and voltage attenuator are optimized for
superior ACLR performance with WCDMA signals.
The high linearity (high OP1dB, OIP3, and ACLR) and high
efficiency of this device make it ideal for use at the final stage (or
close to the final stage) of a WCDMA transmit chain.
The output of the first PA (PA1) is matched to the input of the VVA.
The output of the VVA is matched to the input of the second PA
(PA2). The RF_IN and RF_OUT signals (pins 1 and 8, respectively)
are both internally matched, including DC blocking capacitors.
The SKY65385-11 VGA uses low-cost Surface Mount Technology
(SMT) in the form of a compact, 8 x 8 mm 12-pin Multi-Chip
Module (MCM), which allows for a highly manufacturable low-cost
solution. 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
Frequency range: 791 to 821 MHz
High gain: > 34 dB
Attenuation range: > 30 dB
OP1dB: > +30 dBm
ACLR < –65 dBc for P
OUT
= +12 dBm
Single DC supply: +5 V
Small MCM (12-pin, 8.385 x 8.385 mm) SMT package (MSL3,
260
C
per JEDEC J-STD-020)
Skyworks
Pb-free products are compliant with
all applicable legislation. For additional
information, refer to
Skyworks Definition of
Lead (Pb)-Free,
document number
SQ04-0073.
VCTRL
RF_IN
Input Match
PA1
Variable Attenuator
PA2
Output Match
RF_OUT
S2326
Figure 1. SKY65385-11 Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201750B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 28, 2014
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DATA SHEET • SKY65385-11 VARIABLE GAIN AMPLIFIER
VCC_AMP1
11
12
10
RF_IN
GND
1
VCC_AMP2
GND
9
GND
RF_OUT
2
8
VCTRL
3
7
GND
4
5
6
GND
GND
GND
S2328
Figure 2. SKY65385-11 Pinout – 12-Pin MCM
(Top View)
Table 1. SKY65385-11 Signal Descriptions
Pin
1
2
3
4
5
6
RF_IN
GND
VCTRL
GND
GND
GND
Name
RF input
Ground
Variable attenuator control voltage
Ground
Ground
Ground
Description
Pin
7
8
9
10
11
12
GND
RF_OUT
GND
VCC_AMP2
VCC_AMP1
GND
Name
Ground
RF output
Ground
Voltage supply for PA2 (after the variable
voltage attenuator)
Voltage supply for PA1 (before the variable
voltage attenuator)
Ground
Description
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY65385-11 are provided
in Table 2. The recommended operating conditions are specified
in Table 3 and electrical specifications are provided in Table 4.
Typical performance characteristics of the SKY65385-11 are
illustrated in Figures 3 to 12.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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January 28, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201750B
DATA SHEET • SKY65385-11 VARIABLE GAIN AMPLIFIER
Table 2. SKY65385-11 Absolute Maximum Ratings
Parameter
Supply voltage
Control voltage
RF output power (CW)
Operating case temperature
Storage case temperature
Junction temperature
Thermal resistance (P
OUT
= +12 dBm)
Electrostatic discharge:
Charged Device Model (CDM), Class 3
Human Body Model (HBM), Class 1B
Machine Model (MM), Class A
Note:
Symbol
VCC_AMP1,
VCC_AMP2
V
CTL
P
OUT
T
C
T
STG
T
J
θ
R
ESD
Minimum
Maximum
5.5
5.0
+29
Units
V
V
dBm
C
C
C
C/W
–40
–55
+85
+125
+150
24
500
500
50
V
V
V
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.
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. SKY65385-11 Recommended Operating Conditions
Parameter
Frequency range
RF output power (CW)
Supply voltage, measured at terminals of
Evaluation Board
Variable voltage attenuator control range
Ruggedness, load VSWR with no permanent
damage
Operating case temperature
f
P
OUT
VCC_AMP1,
VCC_AMP2
VCTRL
P
MAX
_
LOAD
8:1
T
C
–40
+85
C
4.75
0
5.00
Symbol
Minimum
791
Typical
Maximum
821
+12
5.25
3.3
Units
MHz
dBm
V
V
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201750B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 28, 2014
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DATA SHEET • SKY65385-11 VARIABLE GAIN AMPLIFIER
Table 4. SKY65385-11 Electrical Specifications (Note 1)
(VCC_AMP1 = VCC_AMP2 = 5 V, VCTRL = 0 V, f = 805 MHz, T
C
= +25
C,
Characteristic Impedance [Z
O
] = 50
Ω,
Unless Otherwise Noted)
Parameter
Frequency range
Small signal gain
Gain control range
Output 1dB Compression Point
3
rd
Order Output Intercept Point
ACLR for P
OUT
= +12 dBm
Noise Figure
Input return loss
Output return loss
Quiescent current
Operating current
Maximum VSWR for stable operation
f
|S
21
|
G
_
RANGE
OP1dB
OIP3
ACLR
NF
|S
11
|
|S
22
|
I
Q
I
OP
VSWR
_
MAX
CW
CW
CW
P
TONE
= +12 dBm,
Δf
= 1 MHz
WCDMA, test mode 1
At maximum gain
P
IN
= –20 dBm
P
IN
= –20 dBm
No RF
P
OUT
= +12 dBm
CW
8:1
10
10
Symbol
Test Condition
Min
791
30.0
28
+30
+42
34.5
33
+31
+46
–70
4.2
14
12
460
460
510
510
–65.0
5.0
Typical
Max
821
Units
MHz
dB
dB
dBm
dBm
dBc
dB
dB
dB
mA
mA
–
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
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January 28, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201750B
DATA SHEET • SKY65385-11 VARIABLE GAIN AMPLIFIER
Typical Performance Characteristics
(VCC_AMP1 = VCC_AMP2 = 5 V, VCTRL = 0 V, f = 805 MHz, T
C
= +25
C,
Characteristic Impedance [Z
O
] = 50
Ω,
Unless Otherwise Noted)
600
+40
+30
S-Parameters
(dB)
+20
+10
0
–10
–20
–30
650
700
750
800
850
900
950
S11
S21
S22
Quiescnet
Current
(mA)
550
500
450
400
Y0464
350
300
4.75
5.00
–40°C
+25°C
+85°C
1000
Frequency (MHz)
5.25
Vcc (V)
Figure 4. Quiescent Current vs Voltage over Temperature
Figure 3. Small Signal Parameters vs Frequency
40
39
38
37
36
35
34
33
32
31
30
29
–20
39
37
Gain
(dB)
Gain
(dB)
35
33
31
–40°C
+25°C
+85°C
17
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
31
33
Y0465
–18
–16
–14
–12
–10
–8
–6
–4
–2
0
29
15
33
Input Power (dBm)
Figure 5. Gain vs Input Power over Temperature
Output Power (dBm)
Figure 6. Gain vs Output Power over Temperature
600
900
Operating
Current
(mA)
550
Operating
Current
(mA)
800
700
600
500
400
300
200
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
29
30
–40°C
+25°C
+85°C
30
30
30
31
500
450
400
350
300
250
200
4.75
5.00
Y0467
5.25
Vcc (V)
Figure 7. Operating Current vs VCC over Temperature
Output Power (dBm)
Figure 8. OIP3 vs Output Power
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201750B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • January 28, 2014
5
Y0468
–40°C
+25°C
+85°C
Y0466
–40°C
+25°C
+85°C
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