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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. ©2012, 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 customerservice@rfmd.com.
Ordering Information
BiFET HBT
NC
RFOut
RFIN
V2
NC
GND
1
2
3
4
5678
9
10
11
12
1314
1516
NC
GND
GNDGND
NC
NC
NC
NC NC
V1
RFSW2044
DC TO 25GHz SPST pHEMT GaAs SWITCH
RFMD’s RFSW2044 is a broadband absorptive SPST GaAs microwave monolithic
integrated circuit (MMIC) switch designed to operate from DC to 25GHz using the
RFMD FD05 0.5μm switch process. It features low insertion loss of 2.7dB at 25GHz
and high isolation of 41dB at 25GHz 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: 2.7dB at
25GHz
High Isolation: 41dB at 25GHz
Excellent Return Loss
23ns Switching Speed
GaAs pHEMT Technology
Compact 3mm x 3mm QFN
package
Applications
Broadband Communications
Test Instrumentation
Fiber Optics
Military
Aerospace
DS120530
Package: QFN, 16 pin, 0.8mm x 3mm x 3mm
RFSW2044DC
to 25Ghz SPST
pHEMT GaAs
Switch
RFSW2044S2 2-Piece sample bag
RFSW2044SB 5-Piece bag
RFSW2044SQ 25-Piece bag
RFSW2044SR 100 Pieces on 7” reel
RFSW2044TR7 750 Pieces on 7” reel
RFSW2044PCK-410 Evaluation board with 2-piece sample bag
2 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Absolute Maximum Ratings
Parameter Rating Unit
Drain Bias Voltage (VCTRL)-10V
DC
RF Port Power +21 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 25 GHz
Insertion Loss (0GHz to 5GHz) 1.0 1.6 dB ON State, All Temps
Insertion Loss (5GHz to 10GHz) 1.25 2.5 dB ON State, All Temps
Insertion Loss (10GHz to 15GHz) 1.6 2.6 dB ON State, All Temps
Insertion Loss (15GHz to 20GHz) 1.9 3.0 dB ON State, All Temps
Insertion Loss (20 GHz to 25 GHz) 2.7 3.8 dB ON State, All Temps
Isolation (DC to 25GHz) 30 45 dB OFF State, All Temps
Input Return Loss (DC to 25GHz) 8 20 dB ON State, All Temps
Input Return Loss (DC to 25GHz) 5 10 dB OFF State, All Temps
Output Return Loss (DC to 25GHz) 8 20 dB ON State, All Temps
Output Return Loss (DC to 25GHz) 5 10 dB OFF State, All Temps
OIP3 (2GHz to 20GHz) 39 47 dBm 100MHz spacing, 2dBm input, 25°C
OIP2 (4GHz to 20GHz) 86 91 dBm 100MHz spacing, 2dBm input, 25°C
Switching Speed 23 28 ns 50% control to 90% RF, All Temps
Control Current 6 15 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 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
4 of 11
RFSW2044
DS120530
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 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
6 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
7 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Truth Table
High = -5V ± 0.2V, Low = 0V, ± 0.2V
Pin Names and Descriptions
Pin Name Description Interface Schematic
1, 2, 3, 4, 5,
9, 12, 16
NC No Connect
6, 8, 13, 15 GND Ground. Grounding via should be located as close as possible to
this pin.
14 RFOut RF output. These pins are DC coupled and matched to 50Ω from
DC to 25GHz.
10, 11 DC DC control for switch operation. Nominal operating voltage is -5V.
7RFIN
RF input. This pin is DC coupled and matched to 50Ω from DC to
25GHz.
Control Line RF Path
V1 V2 RFIn - RFOut
High Low ON (low loss)
Low High OFF (high isolation)
RFout
50ohm
2kohm
4.4pF
RFin
50ohm
8 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Package Drawing
Maximum Height = 1.0mm
Dimensional Tolerance = +0.05mm
9 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Application Schematic
1
2
3
4
5678
12
11
10
9
16 15 14 13
RFin
50 strip DC Block*
V2
V1
RFout
50 strip
DC Block*
Bypass
Cap**
Bypass
Cap**
* Not Required
** Not Required but may be necessary
in some applications to maintain noise
free control lines.
10 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Evaluation Board Schematic
11 of 11
RFSW2044
DS120530
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Evaluation Board Layout
