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DATA SHEET
SKY67022-396LF: 1.6-2.2 GHz High Linearity, Active Bias
Low-Noise Amplifier
Applications
GSM, CDMA, WCDMA, TD-SCDMA cellular infrastructure
Ultra low-noise systems
Balanced, single-ended low-noise amplifier designs
Features
Extended operating temperature range: 40 °C to +100 °C
Low Noise Figure: 0.65 dB @ 1.85 GHz
Excellent IIP3 performance: +21.3 dBm @ 1.85 GHz
Gain: 17.3 dB @ 1.85 GHz
Adjustable supply current
Integrated enable circuitry
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. SKY67022-396LF Pinout – 8-Pin DFN
(Top View)
Figure 1. SKY67022-396LF Block Diagram
Description
The SKY67022-396LF is GaAs, pHEMT Low-Noise Amplifier (LNA)
with an active bias and high linearity performance. The advanced
GaAs pHEMT enhancement mode process provides good 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 3
(VBIAS) 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.
The SKY67022-396LF operates in the frequency range of 1.6 to
2.2 GHz. For lower and higher frequency operation, the pin-
compatible SKY67021-396LF and SKY67023-396LF, respectively,
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 • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Table 1. SKY67022-396LF Signal Descriptions
Pin # Name Description Pin # Name Description
1 N/C No connection. May be connected to ground
with no change in performance.
5 N/C No connection. May be connected to ground
with no change in performance.
2 RFIN RF input. DC blocking capacitor required. 6 ENABLE Enable pin. Active “low” (0 V) = amplifier on
state.
3 VBIAS Bias for 1st stage amplifier. External resistor
sets current consumption.
7 RFOUT/VDD RF output. Apply VDD through RF choke
inductor. DC blocking capacitor required.
4 N/C No connection. May be connected to ground
with no change in performance.
8 N/C No connection. May be connected to ground
with no change in performance.
Table 2. SKY67022-396LF Absolute Maximum Ratings
Parameter Symbol Minimum Typical Maximum Units
Supply voltage VDD 5.0 5.5 V
RF input power PIN +20 dBm
Channel temperature TCH +150 °C
Thermal resistance ΘJC 70 °C/W
Storage temperature TSTG 65 +25 +150 °C
Operating temperature TA 55 +25 +100 °C
Electrostatic Discharge:
Charged Device Model (CDM), Class 4
Human Body Model (HBM), Class 1A
Machine Model (MM), Class A
ESD
1000
250
25
V
V
V
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 = 70 °C/W @ 5 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.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY67022-396LF are
provided in Table 2. Electrical specifications are provided in
Table 3.
Typical performance characteristics of the SKY67022-396LF are
illustrated in Figures 3 through 20.
Table 4 provides noise source pull information versus frequency.
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Table 3. SKY67022-396LF Electrical Specifications (Note 1, 2)
(VDD = 5 V, IDD = 95 mA, TA = +25 °C, PIN = –20 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted)
Parameter Symbol Test Condition Min Typical Max Units
RF Specifications
Noise Figure (Note 3) NF @ 1.85 GHz 0.65 0.85 dB
Small signal gain |S21| @ 1.85 GHz 16.5 17.5 18.5 dB
Input return loss |S11| @ 1.85 GHz 15 20 dB
Output return loss |S22| @ 1.85 GHz 11 16 dB
Reverse isolation |S12| @ 1.85 GHz 27 31 dB
3rd Order Input Intercept Point IIP3 @ 1.85 GHz, Δf = 1 MHz,
PIN = –20 dBm/tone
+19.5 +22.0 dBm
3rd Order Output Intercept Point OIP3 @ 1.85 GHz, Δf = 1 MHz,
PIN = 20 dBm/tone
+37.0 +39.5 dBm
1 dB Input Compression Point IP1dB @ 1.85 GHz +3.5 +5.5 dBm
1 dB Output Compression Point OP1dB @ 1.85 GHz +20 +22 dBm
Stability (Note 4) μ, μ1 Up to 18 GHz,
40 °C to +85 °C
> 1
DC Specifications
Supply voltage VDD 5.0 V
Quiescent supply current IDD Set with external resistor 80 95 110 mA
Amplifier enable off current (logic “high”) IEN 900 1000 μA
Enable rise time TR @ 1.85 GHz 250 500 ns
Enable fall time TF @ 1.85 GHz 250 500 ns
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: Circuit topology optimized for balanced configuration with best IIP3 and NF performance.
Note 3: Loss from the input SMA connector and Evaluation Board up to component M1 has been de-embedded from the NF measurement (0.06 dB).
Note 4: Applies to typical application circuit and components shown in Figure 25.
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Typical Performance Characteristics
(VDD = 5 V, IDD = 95 mA, TA = +25 °C, PIN = –20 dBm, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted)
Figure 3. Broadband Gain Response vs Frequency Over
Temperature
Figure 5. Broadband Input Return Loss vs Frequency Over
Temperature
Figure 7. Broadband Reverse Isolation vs Frequency Over
Temperature
Figure 4. Narrowband Gain Response vs Frequency Over
Temperature
Figure 6. Narrowband Input Return Loss vs Frequency Over
Temperature
Figure 8. Narrowband Reverse Isolation vs Frequency Over
Temperature
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 9. Broadband Output Return Loss vs Frequency Over
Temperature
Figure 11. Noise Figure vs Frequency Over Temperature
Figure 13. IIP3 vs Input Power Over Temperature
@ 5 V, 1850 MHz (Tone Spacing = 1 MHz)
Figure 10. Narrowband Output Return Loss vs Frequency Over
Temperature
Figure 12. IIP3 vs Input Power Over Temperature
@ 5 V, 1700 MHz (Tone Spacing = 1 MHz)
Figure 14. IIP3 vs Input Power Over Temperature
@ 5 V, 2000 MHz (Tone Spacing = 1 MHz)
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 15. Gain vs Input Power Over Temperature
@ 5 V, 1700 MHz
Figure 17. Gain vs Input Power Over Temperature
@ 5.0 V, 2000 MHz
Figure 19. Stability Factor (μ1) vs Frequency Over Temperature
@ 5 V
Figure 16. Gain vs Input Power Over Temperature
@ 5 V, 1850 MHz
Figure 18. Stability Factor (μ) vs Frequency Over Temperature
@ 5 V
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 20. Load Pull, @ 5 V and 95 mA
Table 4. Noise Parameters vs Frequency (5 V, 95 mA)
Frequency
(GHz)
Minimum Noise
Figure (FMIN)
(dB)
Noise Resistance
(RN)
(Ω)
Γopt Associated Gain
(dB)
Maximum Gain
(GMAX)
(dB)
Magnitude Phase
0.80 0.3943 0.0568 0.2238 87.63 24.5523 25.2847
0.84 0.4094 0.0471 0.2306 92.18 24.1907 24.8043
0.89 0.3536 0.0471 0.2612 96.64 23.7780 24.2572
1.20 0.4557 0.0492 0.2812 109.80 21.3562 21.5950
1.42 0.4733 0.0372 0.3975 129.07 20.0944 20.1705
1.52 0.5374 0.0445 0.3073 133.12 19.5423 19.6000
1.76 0.6205 0.0379 0.3401 148.53 18.3915 18.3948
1.84 0.6403 0.0360 0.3616 156.51 18.0381 18.0424
1.92 0.6477 0.0336 0.3760 158.03 17.6947 17.7022
1.98 0.7190 0.0339 0.3614 159.47 17.4468 17.4548
2.00 0.7497 0.0398 0.3744 161.91 17.3564 17.3731
2.38 0.8417 0.0321 0.4238 174.63 15.8965 15.9979
2.48 0.8800 0.0340 0.4230 179.22 15.541 15.6796
2.52 0.9242 0.0332 0.4217 176.79 15.3704 15.5535
2.60 0.9003 0.0368 0.4334 179.03 15.1584 15.3139
3.00 1.0519 0.0413 0.5207 153.49 13.4396 14.2395
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Evaluation Board Description
The SKY67022-396LF Evaluation Board is used to test the
performance of the SKY67022-396LF LNA. An assembly drawing
for the Evaluation Board is shown in Figure 21. The layer detail is
provided in Figure 22. An Evaluation Board schematic diagram is
provided in Figure 23. Table 5 provides the Bill of Materials (BOM)
list for Evaluation Board components.
Package Dimensions
The PCB layout footprint for the SKY67022-396LF is provided in
Figure 24. Typical case markings are shown in Figure 25.
Package dimensions for the 8-pin DFN are shown in Figure 26,
and tape and reel dimensions are provided in Figure 27.
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 SKY67022-396LF 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 21. SKY67022-396LF Evaluation Board Assembly Diagram
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 22. Layer Detail Physical Characteristics
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 23. SKY67022-396LF Evaluation Board Schematic
Table 5. SKY67022-396LF Evaluation Board Bill of Materials (Optimized for 1.7 to 2.0 GHz)
Component Size Value
(5 V @ 95 mA)
Value for Improved IIP3
(4 V @ 95 mA)
Manufacturer Part #
C1 0402 12 pF 12 pF Murata GJM1555C1H120JB01
C2 0402 0.5 pF 0.5 pF Murata GJM1555C1HR50BB01
C3 0402 3.6 pF 3.6 pF Murata GJM1555C1H3R6CB01
C4 0402 2.2 pF 2.2 pF Murata GRM1555C1H2R2CZ01
C5, C7, C8, C10,
C11
0402 1000 pF 1000 pF Murata GRM1555C1H102JA01
C6 0402 100 pF 100 pF Murata GRM1555C1H101JZ01
C9 0402 DNI DNI
L1 0402 6.8 nH 6.8 nH Coilcraft HP 0402HP-6N8X_L
L2 0402 2.4 nH 2.4 nH Coilcraft HP 0402HP-2N4X_L
L3 0402 4.7 nH 4.7 nH TDK MLG1005S4N7S
L4 0402 6.8 nH 6.8 nH TDK MLG1005S6N8JT
R1 0402 DNI DNI
R2, R4 0402 0 Ω 0 Ω Panasonic ERJ-2GEOROOX
R3 0402 5.1 kΩ 3.6 kΩ Panasonic ERJ-2GEJ512X (5.1 kΩ)
ERJ-2GEJ362X (3.6 kΩ)
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 24. SKY67022-396LF PCB Layout Footprint
(Top View)
Figure 25. Typical Case Markings
(Top View)
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 26. SKY67022-396LF 8-Pin DFN Package Dimensions
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Figure 27. SKY67022-396LF Tape and Reel Dimensions
DATA SHEET • SKY67022-396LF HIGH LINEARITY, ACTIVE BIAS LNA
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Ordering Information
Model Name Manufacturing Part Number Evaluation Board Part Number
SKY67022-396LF LNA SKY67022-396LF SKY67022-396LF-EVB
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