SKY65142 Data Sheet Skyworks - Preliminary SKY65142 - Preliminary Data Sheet 100 – 1000 MHz; Ultra Wideband Variable Gain Amplifier Description Skyworks SKY65142 is an ultra-wideband Variable Gain Amplifier (VGA) in a small footprint module. The module contains a Variable Voltage Attenuator with Gain control range of over 20 dB. The device is internally matched for 50 Ohms on all RF ports. The VGA maintains very linear performance over a wide frequency bandwidth with P1dB greater than 27 dBm, and OIP3 greater than 35 dBm. ESD Sensitivity The SKY65142 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions. Electrical and Mechanical Specifications The signal pin assignments and functions are described in Table 1. The absolute maximum ratings for the SKY65142 are provided in Table 2. The recommended operating conditions for the SKY65142 are specified in Table 3. The remaining tables and figures illustrate the device performance at various operating bands. Figure 1. SKY65142 Pinout – 8x8mm MCM Package Features • Wideband Frequency Operation: 100 MHz – 1000 MHz. • Gain Control Range: 20 dB • Gain at Zero Attenuation: 20 dB • Linear Output Power > +27 dBm • Output IP3 > 35 dBm • Single DC Supply: +5V • Low Power Consumption, PAE > 40% • Low Cost Lead Free SMT Package Applications • AMPS / PCS / DCS / GSM / EDGE / GPRS • VHF / UHF TV / Tetra • Base Stations • Repeaters Figure 2. SKY65142 Functional Block Diagram Proprietary Information and Specifications Are Subject to Change August 17, 2006
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100 – 1000 MHz; Ultra Wideband Variable Gain Amplifier100 – 1000 MHz; Ultra Wideband Variable Gain Amplifier Description Skyworks SKY65142 is an ultra-wideband Variable Gain Amplifier
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SKY65142 Data Sheet Skyworks - Preliminary
SKY65142 - Preliminary Data Sheet 100 – 1000 MHz; Ultra Wideband Variable Gain Amplifier
Description
Skyworks SKY65142 is an ultra-wideband Variable Gain Amplifier (VGA) in a small footprint module. The module contains a Variable Voltage Attenuator with Gain control range of over 20 dB. The device is internally matched for 50 Ohms on all RF ports.
The VGA maintains very linear performance over a wide frequency bandwidth with P1dB greater than 27 dBm, and OIP3 greater than 35 dBm.
ESD Sensitivity
The SKY65142 is a static-sensitive electronic device. Do not operate or store near strong electrostatic fields. Take proper ESD precautions.
Electrical and Mechanical Specifications
The signal pin assignments and functions are described in Table 1. The absolute maximum ratings for the SKY65142 are provided in Table 2. The recommended operating conditions for the SKY65142 are specified in Table 3. The remaining tables and figures illustrate the device performance at various operating bands.
Figure 1. SKY65142 Pinout – 8x8mm MCM Package
Features
• Wideband Frequency Operation: 100 MHz – 1000 MHz. • Gain Control Range: 20 dB • Gain at Zero Attenuation: 20 dB • Linear Output Power > +27 dBm • Output IP3 > 35 dBm • Single DC Supply: +5V • Low Power Consumption, PAE > 40% • Low Cost Lead Free SMT Package
Proprietary Information and Specifications Are Subject to Change August 17, 2006
<SKY65142> <Wideband Linear Variable Gain Amplifier >
Table 1. SKY65142 Pin Out Description
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Table 2. SKY65142 Absolute Maximum Ratings
Parameter Symbol Min. Typical Max. Units RF Output power Pout +29 dBm
Supply voltages Vcc, Bias, Vref, Vcnt, V_Att
5.5 V
Power dissipation PD 2000 mW
Case Operating temperature Tc -40 +85 oC
Storage temperature Tst -55 +125 oC
Junction temperature Tj +150 oC
Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device if only one parameter is set at the limit and all other parameters set at or below their nominal conditions.
Parameter Symbol Test Condition Min Typical Max Units
Test Frequency = 150 MHz
Gain at minimum Attenuation Gmax CW 24 dB
Gain Control Range Grange CW 23 dB
Output Power at 1 dB P1dB CW 29 dBm
PAE at P1dB PAE CW 50 %
Output 3rd. Order Intercept Point OIP3 2 tones, 5 dBm/ Output
Tone, 1 MHz separation 36 dBm
Test Frequency = 450 MHz
Gain at minimum Attenuation Gmax CW 23 dB
Gain Control Range Grange CW 20 dB
Output Power at 1 dB P1dB CW 27 dBm
PAE at P1dB PAE CW 40 %
Output 3rd. Order Intercept Point OIP3 2 tones, 5 dBm/ Output
Tone, 1 MHz separation 36 dBm
Test Frequency = 905 MHz
Gain at minimum Attenuation Gmax CW 21 dB
Gain Control Range Grange CW 20 dB
Output Power at 1 dB P1dB CW 27 dBm
PAE at P1dB PAE CW 45 %
Output 3rd. Order Intercept Point OIP3 2 tones, 5 dBm/ Output
Tone, 1 MHz separation 37 dBm
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Gain (dB) vs. Frequency
10
15
20
25
30
100 200 300 400 500 600 700 800 900 1000 1100
Frequency (MHz)
Gai
n (d
B)
Figure 3. Gain (Minimum Attenuation) vs. Frequency
SKY65142Gain vs. Vcon over Frequency
-5
0
5
10
15
20
25
30
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Vcon(V)
Gai
n(dB
)
156MHz
453MHz
908MHz
Figure 4. Gain vs. Vcon vs. Frequency
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Output P1dB vs. Frequency
25
26
27
28
29
30
100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
Out
put P
1dB
(dB
m)
Figure 5. Output P1dB vs Frequency.
PAE vs. Frequency
35
40
45
50
55
100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
PAE
(%)
Figure 6. Power Added Efficiency (PAE) vs. Frequency
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OIP3 vs. Attenuation
32
34
36
38
40
42
0 2.5 5 7.5 10 12.5 15 17.5 20
Attenuation level (dB)
OIP
3 (d
Bm
)156MHz450MHz905MHz
Figure 7. Typical OIP3 vs. Attenuation Value vs. Frequency.
6 SKY65142 Proprietary Information and Specifications Are Subject to Change August 17, 2006
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Evaluation Board Description Skyworks SKY65142 Evaluation Board is used to test the performance of the VGA. The Evaluation Board schematic diagram is shown in Figure 8. The schematic shows the basic design of the board for the 100 to 1000 MHz range. An assembly drawing for the Evaluation Board is shown in Figure 9. Circuit Design Considerations 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 at the bottom of the module 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 module. As such, design the connection to the ground pad to dissipate the maximum wattage produced by the module to the circuit board. Multiple vias to the grounding layer are required. 3. Bypass capacitors should be used on the DC supply lines. RF inductor is required on the Vcc supply line to block RF signal from the DC supply. See Evaluation Board schematic drawing for more details. 4. The RF lines should be well separated from each other, with solid ground in between traces, to maximize input-to-output isolation.
Testing Procedure Use the following procedure to set up the SKY65142 Evaluation Board for testing. 1. Connect +5.0 V DC supply voltages to Bias, and Vref. If available, enable the current limiting function of these power supplies to 0.1 A. 2. Connect a +5.0 V to the Attenuators supply voltages, V_Att and Vcnt. If available, enable the current limiting function of the power supply to 0.05 A. 3. Connect a +5.0 V to the Amplifier supply voltage, Vcc. If available, enable the current limiting function of the power supply to 0.5 A. 4. Connect signal generator(s) to the required RF input port. Set the desired RF signal frequency. Set RF power level to 8 dBm or less to the Evaluation Board but do NOT enable the RF signal. 5. Set the required Attenuation by adjusting the voltage level on Vcnt supply lines. 6. Enable the RF signal. 7. Take measurements. CAUTION: If the input signal exceeds the rated power, the SKY65142 Evaluation Board can be permanently damaged.
SKY65142 7 August 17, 2006 Proprietary Information and Specifications Are Subject to Change
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J2
SMA
V_Att
L168 nH
VCCBIAS
C8
DNI
C9
100 pF
C10
0.01uF
C11
0.01uFC14
1 uF
C15
1uF
Vcnt
VREF
C7
DNI
C12
DNIC13
DNI
11
RFIN2
33
BIA
S4
RE
F5
VC
C6
GND13
9 9
RFOUT8
77
V_C
TR
L11
V_A
TT
12
1010J6
SP00-D311_m4
J1
SMA
Figure 8. Evaluation Board Schematic.
8 SKY65142 Proprietary Information and Specifications Are Subject to Change August 17, 2006
Figure 9. Evaluation Board Drawing.
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Figure 10. SKY65142 Package Details.
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Ordering Information
Model Name Ordering Part Number Evaluation Kit Part Number SKY65142 , 100 - 1000 MHz VGA SKY65142 TW13-D965-0037
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