Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201266H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 2, 2011 1
DATA SHEET
SKY67101-396LF: 0.4-1.2 GHz High Linearity, Active Bias
Low-Noise Amplifier
Applications
• GSM, CDMA, WCDMA, and TD-SCDMA cellular infrastructure
• Ultra low-noise systems
Features
• Ultra Low Noise Figure: 0.57 dB @ 0.9 GHz
• Input and output return loss > 18 dB @ 0.9 GHz
• High OIP3 performance: +33.8 dBm @ 0.9 GHz
• Adjustable supply current and gain
• Temperature and process-stable active bias
• Miniature DFN (8-pin, 2 x 2 mm) package (MSL1 @ 260 °C per
JEDEC J-STD-020)
Figure 2. SKY67101-396LF Pinout – 8-Pin DFN
(Top View)
Figure 1. SKY67101-396LF Block Diagram
Description
The SKY67101-396LF is GaAs, pHEMT Low-Noise Amplifier (LNA)
with an active bias and high linearity performance. The advanced
GaAs pHEMT enhancement mode process provides excellent
return loss, low noise, and high linearity performance.
The internal active bias circuitry provides stable performance over
temperature and process variation. The device offers the ability to
externally adjust supply current and gain. Supply voltage is
applied to the RFOUT/VDD pin through an RF choke inductor. Pin 4
(VIN) should be connected to RFOUT/VDD through an external
resistor to control the supply current. The RFIN and RFOUT/VDD
pins should be DC blocked to ensure proper operation. Pin 5
(FEEDBACK) is connected through an RC network to externally
adjust the gain of the device without affecting the Noise Figure
(NF) of the LNA.
The SKY67101-396LF operates in the frequency range of 0.4 to
1.2 GHz with proper tuning. For higher frequency operation, the
pin-compatible SKY67100-396LF should be used.
The LNA is manufactured in a compact, 2 x 2 mm, 8-pin Dual Flat
No-Lead (DFN) package. 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.
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Table 1. SKY67101-396LF Signal Descriptions
Pin # Name Description Pin # Name Description
1 N/C No connection. May be connected to ground
with no change in performance.
5 FEEDBACK LNA external gain control. Connect to
RFOUT using a series RD network.
2 RFIN RF input. DC blocking capacitor required. 6 N/C No connection. May be connected to ground
with no change in performance.
3 RFGND RF ground. Connect to ground through a
capacitor.
7 RFOUT/VDD RF output. Apply VDD through RF choke
inductor. DC blocking capacitor required.
4 VIN LNA supply current. Connect through series
resistor to VDD.
8 N/C No connection. May be connected to ground
with no change in performance.
Table 2. SKY67101-396LF Absolute Maximum Ratings
Parameter Symbol Minimum Typical Maximum Units
Supply voltage VDD 5.5 V
Supply current IDD 100 mA
RF input power PIN +20 dBm
Storage temperature TSTG –65 +25 +125 °C
Operating temperature TA –40 +25 +85 °C
Junction temperature TJ +150 °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.
Thermal resistance = 80 °C/W @ 4 V bias.
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. The
SKY67101-396LF is a Human Body Model (HBM) Class A ESD device.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY67101-396LF are
provided in Table 2. Electrical specifications are provided in
Table 3.
Typical performance characteristics of the SKY67101-396LF are
illustrated in Figures 3 through 14.
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201266H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 2, 2011 3
Table 3. SKY67101-396LF Electrical Specifications (Note 1)
(VDD = 4.0 V, IDD = 56 mA, TA = +25 °C, PIN = –20 dBm, Characteristic Impedance [ZO] = 50 Ω, Thermal Resistance = 80 °C/W, Unless
Otherwise Noted)
Parameter Symbol Test Condition Min Typical Max Units
RF Specifications
Noise Figure (Note 2) NF @ 0.80 GHz
@ 0.85 GHz
@ 0.90 GHz
0.63
0.59
0.57
1.00
dB
dB
dB
Small signal gain |S21| @ 0.80 GHz
@ 0.85 GHz
@ 0.9 GHz
17.7
17.0
16.6
18.7
18.0
17.6
19.7
19.0
18.6
dB
dB
dB
Input return loss |S11| @ 0.80 GHz
@ 0.85 GHz
@ 0.9 GHz
17.2
18.8
18.2
dB
dB
dB
Output return loss |S22| @ 0.80 GHz
@ 0.85 GHz
@ 0.9 GHz
19.8
33.0
20.0
dB
dB
dB
Reverse isolation |S12| @ 0.80 GHz
@ 0.85 GHz
@ 0.9 GHz
30.5
30.3
30.3
dB
dB
dB
3rd Order Input Intercept Point IIP3 @ 0.9 GHz, Δf = 5 MHz,
PIN = –20 dBm/tone
+16.2 dBm
3rd Order Output Intercept Point OIP3 @ 0.9 GHz, Δf = 5 MHz,
PIN = –20 dBm/tone
+32.5 +33.8 dBm
1 dB Input Compression Point IP1dB @ 0.9 GHz +2.6 dBm
1 dB Output Compression Point OP1dB @ 0.9 GHz +19.2 dBm
Stability u1, u2 Up to 18 GHz,
–40 °C to +85 °C
>1 –
DC Specifications
Supply voltage VDD 4 V
Supply current IDD Set with external resistor 56 mA
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2 Loss from the input SMA connector and Evaluation Board up to component C1 has been de-embedded from the NF measurement.
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Typical Performance Characteristics
(VDD = 4.0 V, IDD = 56 mA, TA = +25 °C, PIN = –20 dBm, Characteristic Impedance [ZO] = 50 Ω, Thermal Resistance = 80 °C/W, Unless
Otherwise Noted)
Figure 3. Broadband Gain Response vs Frequency
Figure 5. Broadband Input Return Loss vs Frequency
Figure 7. Broadband Reverse Isolation vs Frequency
Figure 4. Narrowband Gain Response vs Frequency
Figure 6. Narrowband Input Return Loss vs Frequency
Figure 8. Narrowband Reverse Isolation vs Frequency
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201266H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 2, 2011 5
Figure 9. Broadband Output Return Loss vs Frequency
Figure 11. Noise Figure vs Frequency
Figure 13. u1 Stability vs Frequency
Figure 10. Narrowband Output Return Loss vs Frequency
Figure 12. OIP3 vs Frequency
(PIN = –20 dBm, Spacing = 5 MHz)
Figure 14. u2 Stability vs Frequency
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Evaluation Board Description
The SKY67101-396LF Evaluation Board is used to test the
performance of the SKY67101-396LF LNA. An assembly drawing
for the Evaluation Board is shown in Figure 15. An Evaluation
Board schematic diagram is provided in Figure 16. Table 4
provides the Bill of Materials (BOM) list for Evaluation Board
components.
The test board uses a 10 mil Rogers 4350B substrate on a 50 mil
FR4 supporting substrate. The Rogers 4350B material was
selected for the RF circuit because of its low dielectric constant
(εr) and low εr variation over temperature for the best possible
noise performance.
Package Dimensions
The PCB layout footprint for the SKY67101-396LF is provided in
Figure 17. Typical case markings are shown in Figure 18.
Package dimensions for the 8-pin DFN are shown in Figure 19,
and tape and reel dimensions are provided in Figure 20.
Package and Handling Information
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 SKY67101-396LF is rated to Moisture Sensitivity Level 1
(MSL1) at 260 °C. It can be used for lead or lead-free soldering.
For additional information, refer to the Skyworks Application Note,
Solder Reflow Information, document number 200164.
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.
Figure 15. SKY67101-396LF Evaluation Board Assembly Diagram
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201266H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 2, 2011 7
Figure 16. SKY67101-396LF Evaluation Board Schematic
Table 4. SKY67101-396LF Evaluation Board Bill of Materials
Component Value Size Manufacturer
C1 4.7 pF SMT 0402 Murata GJM (high Q)
C2 47 pF SMT 0402 Murata GRM
C3 0.1 μF SMT 0402 Murata GRM
C4 3.3 pF SMT 0402 Murata GRM
C5 100 pF SMT 0402 Murata GRM
C6 10 pF SMT 0402 Murata GRM
C7 1000 pF SMT 0402 Murata GRM
C8 – – Do not populate
L1 9 nH SMT 0402 Coilcraft HP
L2 4.3 nH SMT 0402 TDK MLG
R1 1300 Ω SMT 0402 Panasonic
R2 51 Ω SMT 0402 Panasonic
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Figure 17. SKY67101-396LF PCB Layout Footprint
(Top View)
Figure 18. Typical Case Markings
(Top View)
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201266H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 2, 2011 9
Figure 19. SKY67101-396LF 8-Pin DFN Package Dimensions
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Figure 20. SKY67101-396LF Tape and Reel Dimensions
DATA SHEET • SKY67101-396LF HIGH LINEARITY, ACTIVE BIAS LNA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201266H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • June 2, 2011 11
Ordering Information
Model Name Manufacturing Part Number Evaluation Board Part Number
SKY67101-396LF LNA SKY67101-396LF SKY67101-396LF-EVB
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