RF3931
30W GaN WIDEBAND POWER AMPLIFIER
Package Style: Hermetic 2-Pin Flanged Ceramic
Features
Broadband Operation DC to
3.5GHz
Advanced GaN HEMT
Technology
Advanced Heat-Sink
Technology
Gain = 15dB at 2GHz
48V Operation Typical
Performance at 900MHz
• Output Power 50W
• Drain Efficiency 65%
• -40°C to 85°C Operation
RF IN
VGQ
Pin 1 (CUT)
GND
BASE
RF OUT
VDQ
Pin 2
Functional Block Diagram
Product Description
Applications
Commercial Wireless
Infrastructure
Cellular and WiMAX
Infrastructure
Civilian and Military Radar
General Purpose Broadband
Amplifiers
Public Mobile Radios
Industrial, Scientific and
Medical
The RF3931 is a 48V 30W high power discrete amplifier designed for commercial
wireless infrastructure, cellular and WiMAX infrastructure, industrial/scien-
tific/medical, and general purpose broadband amplifier applications. Using an
advanced high power density Gallium Nitride (GaN) semiconductor process, these
high-performance amplifiers achieve high efficiency and flat gain over a broad fre-
quency range in a single amplifier design. The RF3931 is an unmatched GaN tran-
sistor packaged in a hermetic, flanged ceramic package. This package provides
excellent thermal stability through the use of advanced heat sink and power dissi-
pation technologies. Ease of integration is accomplished through the incorporation
of simple, optimized matching networks external to the package that provide wide-
band gain and power performance in a single amplifier.
Ordering Information
RF3931S2
2-Piece sample bag
RF3931SB
5-Piece bag
RF3931SQ
25-Piece bag
RF3931SR
100 Pieces on 7” short reel
RF3931TR7
750 Pieces on 7” reel
RF3931PCK-411 Fully assembled evaluation board optimized for 2.14GHz; 48V
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
BiFET HBT
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark 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. ©2012, RF Micro Devices, Inc.
DS120406
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
1 of 14
RF3931
Absolute Maximum Ratings
Parameter
Drain Voltage (V
D
)
Gate Voltage (V
G
)
Gate Current
Operational Voltage
Ruggedness (VSWR)
Storage Temperature Range
Operating Temperature Range (T
L
)
Operating Junction Temperature (T
J
)
Human Body Model
MTTF (T
J
< 200°C, 95% Confidence Limits)*
Thermal Resistance, R
TH
(junction to case)
measured at T
C
= 85°C, DC bias only
Rating
150
-8 to +2
23
65
10:1
-55 to +125
-40 to +85
200
Class 1A
3 x 10
6
3.6
Unit
V
V
mA
V
°C
°C
°C
hours
°C/W
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical perfor-
mance or functional operation of the device under Absolute Maximum Rating condi-
tions is not implied.
The information in this publication is believed to be accurate and reliable. However, no
responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any
infringement of patents, or other rights of third parties, resulting from its use. No
license is granted by implication or otherwise under any patent or patent rights of
RFMD. RFMD reserves the right to change component circuitry, recommended appli-
cation circuitry and specifications at any time without prior notice.
RFMD Green: RoHS compliant per EU Directive 2002/95/EC, halogen free
per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric
materials and red phosphorus as a flame retardant, and <2% antimony in
solder.
*MTTF - median time to failure for wear-out failure mode (30%ldss
degradation) which is determined by the technology reliability. Refer to
product qualification report for FIT (random) Failure rate.
Operation of this device beyond any one of these limits may cause permanent
damage. For reliable continuous operation, the device voltage and current
must not exceed the maximum operating values specified in the table on page
two.
Bias Conditions should also satisfy the following expression:
P
DISS
< (T
J
– T
C
) / R
TH
J-C and T
C
= T
CASE
Parameter
Recommended Operating Conditions
Drain Voltage (V
DSQ
)
Gate Voltage (V
GSQ
)
Drain Bias Current
Frequency of Operation
Specification
Min.
Typ.
Max.
28
-5
DC
4
17
12
2
2.5
-4.2
0.25
-3.5
10
55
12
60
-12
-10
-3
130
3500
48
-2.5
Unit
V
V
mA
MHz
pF
pF
pF
mA
mA
V
V
V
dB
%
dB
V
G
= -8V, V
D
= 0V
V
G
= -8V, V
D
= 0V
V
G
= -8V, V
D
= 0V
V
G
= -8V, V
D
= 0V
V
G
= -8V, V
D
= 48V
Condition
Capacitance
C
RSS
C
ISS
C
OSS
DC Function Test
I
G (OFF)
- Gate Leakage
I
D (OFF)
- Drain Leakage
V
GS (TH)
- Threshold Voltage
V
DS (ON)
- Drain Voltage at high current
V
G
= -8V, I
D
= 6.6mA
V
G
= 0V, I
D
= 1.5A
[1],[2]
V
D
= 48V, I
D
= 130mA
CW, P
OUT
= 45.8dBm, f = 2140MHz
CW, P
OUT
= 45.8dBm, f = 2140MHz
CW, P
OUT
= 45.8dBm, f = 2140MHz
RF Function Test
V
GS (Q)
Gain
Drain efficiency
Input Return Loss
2 of 14
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS120406
RF3931
Parameter
RF Typical Performance
Small Signal Gain
Small Signal Gain
Output Power at P3dB
Output Power at P3dB
Drain Efficiency at P3dB
Drain Efficiency at P3dB
20
14
47
46.5
65
65
dB
dB
dBm
dBm
%
%
Specification
Min.
Typ.
Max.
Unit
[1],[2]
CW, f = 900MHz
CW, f = 2140MHz
CW, f = 900MHz
CW, f = 2140MHz
CW, f = 900MHz
CW, f = 2140MHz
Condition
[1] Test Conditions: CW Operation, V
DSQ
= 48V, I
DQ
= 130mA, T = 25°C
[2] Performance in a standard tuned test fixture
DS120406
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
3 of 14
RF3931
Typical Performance in standard 2.14GHz fixed tuned test fixture
(CW, T = 25°C, unless noted)
Small Signal Performance vs. Frequency, Pout = 30dBm
(Vd = 48V, Idq = 130mA)
16
15
14
13
12
Gain (dB)
-5
Fixed tuned test circuit
-7
-9
Input Return Loss (dB)
-11
-13
-15
-17
-19
Gain
IRL
-21
-23
2110
2140
Frequency (MHz)
2170
-25
2200
11
10
9
8
7
6
2080
Gain/IRL vs. Frequency, Pout = 46dBm
(CW, Vd = 48V, Idq = 130mA)
15
14
13
12
11
Gain (dB)
10
9
8
7
6
5
2080
2100
2120
2140
2160
Frequency (MHz)
2180
Gain
IRL
Fixed tuned test circuit
-5
-7
-9
Input Return Loss (dB)
-11
-13
-15
-17
-19
-21
-23
-25
2200
50
2080
58
60
Drain Efficiency vs. Frequency, Pout = 46dBm
(CW, Vd = 48V, Idq = 130mA)
Fixed tuned test circuit
Drain Efficiency (%)
56
54
Eff
52
2100
2120
2140
2160
Frequency (MHz)
2180
2200
4 of 14
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS120406
RF3931
Gain/ Efficiency vs. Pout, f = 2140MHz
(CW, Vd = 48V, Idq = 130mA)
16
14
12
70
60
50
40
30
20
10
0
29
31
33
35
37
39
41
Pout, Output Power (dBm)
43
45
47
Gain/ Efficiency vs. Pout, f = 2140MHz
(Pulsed 10% duty cycle, 10uS, Vd = 48V, Idq = 130mA)
16
14
12
Gain (dB)
70
60
Drain Efficiency (%)
Drain Efficiency (%)
50
40
30
Gain
Drain Eff
20
10
0
30
32
34
36
38
40
Pout, Output Power (dBm)
42
44
46
Gain (dB)
10
8
6
4
2
10
8
6
4
2
Gain
Drain Eff
IMD3 vs. Pout
(2-Tone 1MHz Sepera on, Vd = 48V, Idq varied, fc = 2140MHz)
-10
IMD3, Intermodula on Distor on (dBc)
-15
-20
-25
-30
-35
-40
65mA
100mA
130mA
260mA
390mA
Gain vs. Pout
(2-Tone 1MHz Sepera on, Vd = 48V, Idq varied, fc = 2140MHz)
18
17
16
15
Gain (dB)
14
13
12
65mA
100mA
130mA
260mA
390mA
1
10
Pout, Output Power (W-PEP)
100
-45
11
-50
1
10
Pout, Output Power (W-PEP)
100
10
IMD vs. Output Power
(Vd = 48V, Idq = 130mA, f1 = 2139.5MHz, f2 = 2140.5MHz)
0
-IMD3
Intermodula on Distor on (IMD - dBc)
IMD3
IMD5
IMD7
-10
-20
-30
-40
-50
-60
-70
1
-IMD5
-IMD7
10
Pout, Output Power (W- PEP)
100
DS120406
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
5 of 14
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