1 of 10
Optimum Technology Matching® Applied
GaAs HBT
InGaP HBT
GaAs MESFET
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
Functional Block Diagram
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.
Ordering Information
RF MEMS
LDMOS
V3
NC
RF2
GND
RFIN
GND RF1
GND
V1V2
V4
1
2
3
4
5678
9
10
11
12
1314
1516
NC
GND
GND
GND
NC
RFSW2041
DC TO 20GHz SPDT pHEMT GaAs SWITCH
RFMD’s RFSW2041 is a broadband reflective SPDT GaAs microwave monolithic
integrated circuit (MMIC) switch designed to operate from DC to 20GHz using the
RFMD FD05 0.5μm switch process. It features low insertion loss of 1.7dB at 20GHz
and high isolation of 38dB at 20GHz while being packaged in a compact low cost
3mm x 3mm QFN package for easy end use assembly. The switch uses comple-
mentary control logic of -5/0V and does not require a separate bias supply.
Features
Low Insertion Loss: 1.7dB at
20GHz
High Isolation: 38dB at 20GHz
20nS Switching Speed
GaAs pHEMT Technology
Compact 3mm x 3mm QFN Pack-
age
Applications
Broadband Communications
Test Instrumentation
Fiber Optics
Military
Aerospace
DS120222
Package: QFN, 16-pin, 0.8mm x 3mm x 3mm
RFSW2041DC
to 20Ghz SPDT
pHEMT GaAs
Switch
RFSW2041S2 2-Piece sample bag
RFSW2041SB 5-Piece bag
RFSW2041SQ 25-Piece bag
RFSW2041SR 100 Pieces on 7” reel
RFSW2041TR7 750 Pieces on 7” reel
RFSW2041PCK-410 Evaluation board with a 2-piece sample bag
2 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Absolute Maximum Ratings
Parameter Rating Unit
Drain Bias Voltage (VCTRL)-10V
DC
RF Input Power +30 dBm
Storage Temperature -55 to +150 °C
Operating Temperature -55 to +85 °C
ESD JESD22-A114 Human Body
Model (HBM)
Class 1A (All pads)
Parameter Specification Unit Condition
Min. Typ. Max.
Operating Frequency DC 20 GHz
Insertion Loss (0GHz to 5GHz) 1.1 1.6 dB ON State, All Temps
Insertion Loss (5GHz to 10GHz) 1.2 2.2 dB ON State, All Temps
Insertion Loss (10GHz to 15GHz) 1.4 2.3 dB ON State, All Temps
Insertion Loss (15GHz to 20GHz) 1.7 2.7 dB ON State, All Temps
Isolation (DC to 20GHz) 34 38 dB ON State, All Temps
Input Return Loss (DC to 20GHz) 12 15 dB ON State, All Temps
Output Return Loss (DC to 20GHz) 11 20 dB ON State, All Temps
OIP3 (2GHz to 20GHz) 34 46 dBm 100MHz spacing, 2dBm input, 25 °C
OIP2 (4GHz to 20GHz) 80 83 dBm 100MHz spacing, 2dBm input, 25 °C
Switching Speed 20 25 ns 50% control to 90% RF, All Temps
Control Current 32 50 µA Sum of all control lines, 25 °C
Control Voltage 0/-5 V
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.
3 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
4 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
5 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
6 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Truth Table
High = -5V ±0.2V, Low = 0V, ±0.2V
Pin Function Description Interface Schematic
1, 10, 11 NC No Connect
2, 4, 7, 9,
12, 14
GND Ground. Grounding via should be located as close as possible to
this pin.
8, 13 RF2, RF1 RF output. These pins are DC coupled and matched to 50Ω from
DC to 20GHz.
5, 6, 15, 16 V3, V4, V1,
V2
DC control for switch operation. Nominal operating voltage is -5V.
3RFIN
RF input. This pin is DC coupled and matched to 50Ω from DC to
20GHz.
Control Line RF Path
V1 V2 V3 V4
High Low High Low RFin to RF1
Low High Low High RFin to RF2
Low High High Low OFF (high isolation)
RFout
2kohm
4.4pF
RFin
7 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Package Drawing
Maximum Height=1.0mm
Dimensional Tolerance=+0.05mm
8 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Application Schematic
1
2
3
4
5 6 7 8
12
11
10
9
16 15 14 13
RF 2
50 strip
DC Block*
RFin
50 strip
DC Block*
V2
V1
V3
Bypass
Cap**
RF 1
50 strip
DC Block*
Bypass
Cap**
Bypass
Cap**
Bypass
Cap**
V4
* Not Required
** Not Required but may be necessary
in some applications to maintain noise
free control lines .
9 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Evaluation Board Schematic
V1 15
GND
1
GND
2
RFin
3
GND
4
V3
5
V4
6
GND
7
RF02
8
GND 9
GND 10
GND 11
GND 12
RF01 13
GND 14
V2 16
U1
SW2041
GND
GND
GND
1
2
J1 RFin
1
2
J2
RF02
1
2
J3 RF01
GND
GND
1
2
3
4
5
P1
HDR_1X5
10 of 10
RFSW2041
DS120222
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Evaluation Board Layout
