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AN RFMD® APPLICATION NOTE
RFGA2012 Application Note
Product Description
The RFGA2012 is DFN package power linear amplifier specifically designed to achieve high OIP3. It offers ultra-linear performance at low DC power. The RFGA2012 features a VBIAS pin that enables users to optimize the quiescent current for specific
requirement. The VBIAS pin also serves as a power-down pin. This amplifier is ideal for Low Power Linear Gain Stage, IF, cellular, DCS, PCS, UMTS, WiFi, WiMax, TD-SCDMA, LTE Amplifiers, and Low Power LNA.
The RFGA2012 is capable of operating in other bands such as 430MHz to 470MHz, 824MHz to 894MHz, 869MHz to 960MHz,
and 2400MHz to 2500MHz. Its external matching allows for use across various standard frequency bands within 150MHz to
3GHz.
The following performance data was collected at normal operation condition (room temperature, supply voltage and VBIAS of
3.3V, and two tone power of 0dBm).
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2010, RF Micro Devices, Inc.
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
1 of 13
RFGA2012 Application Note
RFGA2012 Typical Performance - 430MHz to 470MHz Application Circuit
VPD
VCC
4.7uF
4.7uF
1uF
10pF
47pF
0Ohm
150nH
100pF
1
8
2
7
3
6
4
5
10nH
RF_In
100pF
RF IN
3.6pF
RF Out/Vcc
RF_OUT
33nH
3.6pF
1.8K Ohm
56pF
0.5pF
Figure 1. Schematic
Figure 2. 430MHz to 470MHz Application Circuit
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
2 of 13
RFGA2012 Application Note
S-Parameters: 430MHz to 470MHz
Input Return Loss versus Frequency
Output Return Loss versus Frequency
0
0
-2
-1
-2
Output Return Loss (dB)
Input Return Loss (dB)
-4
-6
-8
-10
-12
-14
-3
-4
-5
-6
-7
-8
-16
-9
-18
-10
430
435
440
445
450
455
460
465
470
430
435
440
Frequency (MHz)
445
450
455
460
465
470
460
465
470
Frequency (MHz)
Gain versus Frequency
Isolation versus Frequency
0
40
38
-5
36
-10
Isolation (dB)
Gain (dB)
34
32
30
28
-15
-20
-25
26
-30
24
-35
22
20
-40
430
435
440
445
450
455
Frequency (MHz)
AN111112
460
465
470
430
435
440
445
450
455
Frequency (MHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
3 of 13
RFGA2012 Application Note
Data: 430MHz to 470MHz
Output IP3 versus Frequency
34
33
33
32
32
31
31
Output IP3 (dBm)
Gain (dB)
Gain versus Frequency
34
30
29
28
30
29
28
27
27
26
26
25
25
24
24
430
435
440
445
450
455
460
430
470
465
435
440
445
455
460
465
470
465
470
Noise Figure versus Frequency
20
3.0
19
2.9
18
2.8
17
2.7
Noise Figure (dB)
Output P1dB (dBm)
Output P1dB versus Frequency
16
15
14
2.6
2.5
2.4
13
2.3
12
2.2
11
2.1
10
2.0
430
435
440
445
450
455
460
465
430
470
435
440
445
Frequency (MHz)
450
455
460
Frequency (MHz)
Gain versus POUT
Output IP3 versus POUT
30.1
Output IP3 (dBm)
30.2
25.2
Gain (dB)
450
Frequency (MHz)
Frequency (MHz)
20.2
430 MHz
15.2
25.1
20.1
430 MHz
15.1
450 MHz
450 MHz
470 MHz
470 MHz
10.2
10.1
0
2
4
6
8
POUT (dBm)
AN111112
10
12
14
0
2
4
6
8
10
12
14
POUT (dBm)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
4 of 13
RFGA2012 Application Note
RFGA2012 Typical Performance - 824MHz to 894MHz Application Circuit
Figure 3. Schematic
Figure 4. 824MHz to 894MHz Application Circuit
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
5 of 13
RFGA2012 Application Note
S-Parameters: 824MHz to 894MHz
Input Return Loss versus Frequency
Output Return Loss versus Frequency
-12.6
0
-12.7
-2
Output Return Loss (dB)
Input Return Loss (dB)
-12.8
-12.9
-13.0
-13.1
-13.2
-13.3
-4
-6
-8
-10
-12
-14
-13.4
-13.5
-16
824
834
844
854
864
874
884
824
894
834
844
Frequency (MHz)
854
864
874
884
894
884
894
Frequency (MHz)
Gain versus Frequency
Isolation versus Frequency
30
-25.4
28
-25.6
26
-25.8
Isolation (dB)
Gain (dB)
24
22
20
18
-26
-26.2
16
14
-26.4
12
10
-26.6
824
834
844
854
864
Frequency (MHz)
AN111112
874
884
894
824
834
844
854
864
874
Frequency (MHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
6 of 13
RFGA2012 Application Note
Data: 824MHz to 894MHz
Output IP3 versus Frequency
41
24
40
23
39
22
38
Output IP3 (dBm)
Gain (dB)
Gain versus Frequency
25
21
20
19
37
36
35
18
34
17
33
16
32
31
15
824
834
844
854
864
874
884
824
894
834
844
854
864
884
894
874
884
894
10
12
14
874
Frequency (MHz)
Frequency (MHz)
Output P1dB versus Frequency
Noise Figure versus Frequency
19
4.0
18
3.5
16
Noise Figure (dB)
Output P1dB (dBm)
17
15
14
13
12
11
3.0
2.5
2.0
1.5
10
9
1.0
824
834
844
854
864
874
884
894
824
834
844
Frequency (MHz)
854
864
Frequency (MHz)
Gain versus POUT
Output IP3 versus POUT
23
22
38.2
21
Output IP3 (dBm)
Gain (dB)
20
19
18
17
16
33.2
28.2
23.2
824 MHz
824 MHz
15
14
859 MHz
18.2
859 MHz
894 MHz
894 MHz
13
13.2
0
2
4
6
8
POUT (dBm)
AN111112
10
12
14
0
2
4
6
8
POUT (dBm)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
7 of 13
RFGA2012 Application Note
RFGA2012 Typical Performance - 869MHz to 960MHz Application Circuit
Figure 5. Schematic
Figure 6. 869MHz to 960MHz Application Circuit
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
8 of 13
RFGA2012 Application Note
S-Parameters: 869MHz to 960MHz
Input Return Loss versus Frequency
Output Return Loss versus Frequency
0
-13.8
-14.0
Input Return Loss (dB)
Input Return Loss (dB)
-5
-14.2
-14.4
-14.6
-14.8
-10
-15
-20
-15.0
-15.2
-25
869
879
889
899
909
919
929
939
949
959
869
879
889
899
Frequency (MHz)
909
919
929
939
949
959
939
949
959
Frequency (MHz)
Gain versus Frequency
Isolation versus Frequency
30
-24.6
28
-24.8
26
-25.0
Isolation (dB)
Gain (dB)
24
22
20
18
16
-25.2
-25.4
-25.6
14
-25.8
12
10
-26.0
869
879
889
899
909
919
Frequency (MHz)
AN111112
929
939
949
959
869
879
889
899
909
919
929
Frequency (MHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
9 of 13
RFGA2012 Application Note
Data: 869MHz to 960MHz
Output IP3 versus Frequency
40
23
39
22
38
21
37
Output IP3 (dBm)
Gain (dB)
Gain versus Frequency
24
20
19
18
36
35
34
17
33
16
32
15
31
30
14
869
879
889
899
909
919
929
939
949
869
959
879
889
899
Output P1dB versus Frequency
919
929
939
949
959
949
959
Noise Figure versus Frequency
19
4.0
18
3.8
17
3.6
16
3.4
Noise Figure (dB)
Output P1dB (dBm)
909
Frequency (MHz)
Frequency (MHz)
15
14
13
3.2
3.0
2.8
12
2.6
11
2.4
10
2.2
9
2.0
869
879
889
899
909
919
929
939
949
869
959
879
889
899
Frequency (MHz)
909
919
929
939
Frequency (MHz)
Gain versus POUT
Output IP3 versus POUT
24
23
39.1
22
34.1
Output IP3 (dBm)
Gain (dB)
21
20
19
18
29.1
24.1
17
869 MHz
869 MHz
16
19.1
915 MHz
15
915 MHz
960 MHz
960 MHz
14
14.1
0
2
4
6
8
POUT (dBm)
10
12
14
0
2
4
6
8
10
12
14
POUT (dBm)
T
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
10 of 13
RFGA2012 Application Note
RFGA2012 Typical Performance - 2400MHz to 2500MHz Application Circuit
VBIAS
VCC
C
4.7 uF
C
4.7 uF
C
1000 pF
VBIAS
NC
1
C
1 uF
RFIN
2
C
0.2 pF
Joh
R
10Ÿ
GND
3
NC
4
C
1 uF
L
2.2 nH
8
AMP
RF_In
R1
160Ÿ
RFOUT/VCC
C
0.9 pF
Joh
RF_Out
7
NC
6
C
0.2 pF
Joh
R
2kŸ
GND
5
Figure 7. Schematic
Figure 8. 2400MHz to 2500MHz Application Circuit
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
11 of 13
RFGA2012 Application Note
S-Parameters: 2400MHz to 2500MHz
Input Return Loss versus Frequency
Output Return Loss versus Frequency
0
-12.5
-2
Output Return Loss (dB)
Input Return Loss (dB)
-13.0
-13.5
-14.0
-14.5
-4
-6
-8
-10
-12
-15.0
-14
-15.5
2400
2410
2420
2430
2440
2450
2460
2470
2480
2490
-16
2400
2500
2410
2420
2430
Frequency (MHz)
13.5
-17.70
13
-17.75
12.5
-17.80
12
11.5
10.5
-18.00
2440
2450
2460
Frequency (MHz)
AN111112
2480
2490
2500
2480
2490
2500
-17.90
-17.95
2430
2470
-17.85
11
2420
2460
Isolation versus Frequency
-17.65
Isolation (dB)
Gain (dB)
Gain versus Frequency
2410
2450
Frequency (MHz)
14
10
2400
2440
2470
2480
2490
2500
-18.05
2400
2410
2420
2430
2440
2450
2460
2470
Frequency (MHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
12 of 13
RFGA2012 Application Note
Data: 2400MHz to 2500MHz
Output IP3 versus Frequency
39
16
38
15
37
14
36
Output IP3 (dBm)
Gain (dB)
Gain versus Frequency
17
13
12
11
35
34
33
10
32
9
31
8
30
7
2400
2410
2420
2430
2440
2450
2460
2470
2480
2490
29
2400
2500
2410
2420
2430
2440
2450
2460
2470
2480
2490
2500
2480
2490
2500
Frequency (MHz)
Frequency (MHz)
Output P1dB versus Frequency
Noise Figure versus Frequency
19
3.0
18
2.5
16
Noise Figure (dB)
Output P1dB (dBm)
17
15
14
13
12
11
2.0
1.5
1.0
0.5
10
9
2400
2410
2420
2430
2440
2450
2460
2470
2480
2490
2500
0.0
2400
2410
2420
2430
Frequency (MHz)
2440
2450
2460
2470
Frequency (MHz)
Gain versus POUT
Output IP3 versus POUT
17
39.6
16
15
34.6
Output IP3 (dBm)
Gain (dB)
14
13
12
11
29.6
24.6
10
2400 MHz
2400 MHz
9
2450 MHz
19.6
2450 MHz
8
2500 MHz
2500 MHz
14.6
7
0
2
4
6
8
POUT (dBm)
10
12
14
0
2
4
6
8
10
12
14
POUT (dBm)
T
AN111112
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
13 of 13
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