Features
1 of 6
Optimum Technology
Matching® Applied
GaAs HBT
InGaP HBT
GaAs MESFET
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
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. ©2006, RF Micro Devices, Inc.
Product Description
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
InP HBT
LDMOS
RF MEMS
FMS2031-001
10W GaAs pHEMT SPDT SWITCH
The FMS2031-001 is a 10W, Single-pole, Double-throw, (SPDT) GaAs pHEMT reflec-
tive antenna switch. The switch offers excellent power handling capability and har-
monic performance. The FMS2031-001 is designed for use in WiMax, L-, S-, and C-
band wireless applications and WLAN access points where high linearity switching
is required.
V1
RF1
ANT
V2
RF2
31dB Isolation at 2.5GHz
0.5dB Insertion Loss at
2.5GHz
P0.1dB 41dBm at 2.3GHz
Less than 10μA Control Cur-
rent at 35dBm Input Power
Applications
WiMax
L-, S-, and C-band Applica-
tions
WLAN Applications
DS100331
9
Package: 3mmx3mm QFN
FMS2031-001
10W GaA s
pHEMT SPDT
Switch
Parameter Specification Unit Condition
Min. Typ. Max.
Electrical Specifications TAMBIENT=2C, VCTRL =0V/2.7V, ZIN =ZOUT =50Ω
Insertion Loss 0.5 0.7 dB DC to 3GHz
1dB3GHz to 4GHz
0.9 dB 4GHz to 5GHz
Return Loss 20 dB DC to 4GHz
15 dB 4GHz to 5GHz
10 dB 4.9GHz to 5.9GHz
Isolation 30 32 dB DC to 3GHz
29 dB 3GHz to 4GHz
23 dB 4GHz to 5GHz
PIN at 0.1dB Compression Point 43 dBm 900MHz
41 dBm 2.3 GHz
2nd Harmonic -83 dBc 900MHz, 35dBm CW
-85 -73 dBc 1950MHz, 33dBm CW
3rd Harmonic -85 dBc 900MHz, 35dBm CW
-81 -73 dBc 1950MHz, 33dBm CW
EVM (Contribution Due to Switch) Δ0.5 % 35dBm at 5.9GHz (OFDM WLAN 54)
IIP3 60 dBm 1950MHz, 1MHz spacing, +20dBm per tone
IIP2 87 dBm 1950MHz, 1MHz spacing, +20dBm per tone
Switching Speed: TRISE, TFALL 90 ns 10% to 90% RF and 90% to 10% RF
Switching Speed: TON, TOFF 350 ns 50% control to 10% and 90% RF
Control Current <5 10 μA +35dBm RF input @ 0.96GHz
2 of 6 DS100331
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
FMS2031-001
Disclaimer
This product is not designed for use in any space-based or life-sustaining/supporting equipment.
Note: External DC blocking capacitors are required on all RF ports. All unused ports terminated in 50Ω.
High: +2.3V to +6V. Low: +0V to +0.2V.
Ordering Information
Absolute Maximum Ratings
Parameter Rating Unit
Max Input Power, OFDM Modulated,
3:1 Load VSWR +39 dBm
Max Input Power, 2:1 VSWR +41 dBm
ESD HBM Rating Class 1A
Control Voltage +6 V
Operating Temperature -40 to 85 °C
Maximum Junction Temperature 125 °C
Storage Temperature -55 to 150 °C
Notes:
At high powers, the dissipation in the switch can be significant and the resulting
thermal effects need to be taken into account. The device should be appropri-
ately heat-sinked.
For thermal calculations, the dissipation within the switch should be taken as η =
5.5%. This should include the power input to the switch and reflected back from
an external mismatch.
The thermal resistance of the switch is RTH=70°C/W.
TJ=TOP+PIN .η. RTH, where TJ<TJMAX
Truth Table
Switch State VC1 VC2 ANT - RF1 ANT - RF2
A High Low Insertion loss Isolation
B Low High Isolation Insertion Loss
Delivery Quantity Ordering Code
Reel of 1000 FMS2031-001
Reel of 100 FMS2031-001SR
Bag of 25 FMS2031-001SQ
Bag of 5 FMS2031-001SB
Evaluation Board FMS2031-001-PCK1
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.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
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.
3 of 6DS100331
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
FMS2031-001
Typical Measured Performance on Evaluation Board (De-embedded)
Measurement Conditions: VCTRL=2.7V (high) and 0V (low), TAMBIENT=25°C unless otherwise stated.
-80
-70
-60
-50
-40
-30
-20
-10
0
0123456
Isolation
(dB)
Frequency (GHz)
Isolation Loss versus Frequency
No Capacitor
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0123456
Insertion Loss
(dB)
Frequency (GHz)
Insertion Loss versus Frequency Over Temp
C=100pF
-40°C
25°C
85°C
-30
-25
-20
-15
-10
-5
0
0123456
Isolation
(dB)
Frequency (GHz)
Return Loss versus Frequency Over Temp
C=100pF
-40°C
25°C
85°C
-80
-70
-60
-50
-40
-30
-20
-10
0
0123456
Isolation
(dB)
Frequency (GHz)
Isolation versus Frequency Over Temp
-40°C
25°C
85°C
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Insertion
Loss
(dB)
Frequency (GHz)
Insertion Loss versus Frequency
No Capacitor
-30
-25
-20
-15
-10
-5
0
0123456
Insertion
Loss
(dB)
Frequency (GHz)
Return Loss versus Frequency
No Capacitor
4 of 6 DS100331
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
FMS2031-001
Typical Measured Performance on Evaluation Board (De-embedded)
Measurement Conditions: VCTRL=2.7V (high) and 0V (low), TAMBIENT=25°C unless otherwise stated.
-90
-85
-80
-75
-70
-65
30 32 34 36 38 40
Harmonics
(dBc)
Input Power (dBm)
Harmonics versus Input Power
(1880MHz, VC=2.7V, 25°C)
2nd
3rd
-90.0
-85.0
-80.0
-75.0
-70.0
-65.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0
Harmonics
(dBc)
Control Voltage
3rd Harmonic, 880MHz, 35dBm, Over Temp
-40°C
25°C
85°C
-90
-85
-80
-75
-70
-65
2.0 2.5 3.0 3.5 4.0 4.5 5.0
Harmonics
(dBc)
Control Voltage
2nd Harmonic, 880MHz, 35dBm, Over Temp
-40°C
25°C
85°C
-90
-85
-80
-75
-70
-65
2.0 2.5 3.0 3.5 4.0 4.5 5.0
Harmonics
(dBc)
Control Voltage
3rd Harmonic , RF1, 1880MHz, 33dBm, Over Temp
-40°C
25°C
85°C
-90
-85
-80
-75
-70
-65
2.0 2.5 3.0 3.5 4.0 4.5 5.0
Harmonics
(dBc)
Control Voltage
2nd Harmonic, 1880MHz, 33dBm, Over Temp
-40°C
25°C
85°C
30.0
35.0
40.0
45.0
50.0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Input
Power
(dBm)
Control Voltage (V)
FMS2031 P0.1dB Compression versus Voltage
880MHz
1.8GHz
2.3GHz
5 of 6DS100331
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
FMS2031-001
Part Identification
First row: Device code “2031”. Second row: Trace Code, to be assigned by SubCon.
Package Drawing
QFN 12-Lead 3mmx3mm
Pad Layout
Tape and Reel Specification
Tape and reel information on this material is in accordance with EIA-481-1 except where exceptions are identified.
Pin Function Description
1NC
No connect.
2NC
No connect.
3NC
No connect.
4RF2
RF port 2, DC block required
5NC
No connect.
6NC
No connect.
7V2
V2 logic control voltage
8ANT RF
RF common port, DC block
required
9V1
V1 logic control voltage
10 NC No connect.
11 NC No connect.
12 RF1 RF port 1, DC block required
Paddle Ground.
1.150±0.050
Exp.DAP
SIDE VIEW
BOTTOM VIEW
1.000
Ref.
TOP VIEW
0.000-0.050
3.000±0.050
PIN 1 DOT
BY MARKING 3.000±0.050
0.230±0.050
0.500 Bsc
0.203 Ref.
1.150±0.050
Exp.DAP
0.550±0.050
PIN #1 IDENTIFICATION
SQ 0.430
0.850±0.050
10
5
3
V1
12
1 2
9
Pin 1
RF1
V2
RF2
ANT
11
4
6
7 8
PADDLE
6 of 6 DS100331
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
FMS2031-001
Evaluation Board Layout
Bill of Materials
Label Component
C1-C9 Capacitor, 100pF, 0402
V1 V2
RFC
RF1 RF2
FMS2031410(B)
FMS2031410(B)