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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-
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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
RF4
RF1146
RF3
Charge
Pump/
Decoder
RF2
RF1
ANT
VDD
V1
V2
RF1146
BROADBAND LOW POWER SP4T SWITCH
The RF1146 is a single-pole four-throw (SP4T) switch designed for general
purpose switching applications which require very low insertion loss and
low power handling capability.
The RF1146 is ideally suited for battery operated applications requiring
high performance switching with very low DC power consumption. The
RF1146 features very low insertion loss with excellent linearity perfor-
mance down to 1.8V control voltage. Additionally, RF1146 includes inte-
grated decoding logic, allowing just two control lines needed for switch
control. The RF1146 is packaged in a very compact 3mmx3mmx0.6mm,
16-pin, leadless QFN package. No DC-blocking capacitors are required on
RF paths, unless DC is applied externally to the device ports.
Features
Low Frequency - 2.5GHz
Operation
Very Low Insertion Loss:
Cell Band 0.35dB
PCS Band 0.45dB
High Isolation:
Cell Band 29dB
PCS Band 22dB
Compatible With Low Voltage
Logic: (VHIGH=1.8V)
Excellent Linearity Perfor-
mance (IIP2):
Cell Band 106dBm
PCS Band 110dBm
Lowest BOM Cost and Small
Solution Size: No DC Blocking
Capacitors Required on the
RF Paths
Applications
Cellular Handset Applications
Cellular Infrastructure Appli-
cations
RF1146 Broadband Low Power SP4T Switch
RF1146PCBA-410 Fully Assembled Evaluation Board
DS120102
Package Style: QFN, 16-pin, 3mmx3mm
2 of 9
RF1146
DS120102
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
VDD, V1, V2 6.0 V
Maximum Input Power (DC to
2.5GHz, 2.5V Control)
28 dBm
Operating Temperature -30 to +85 °C
Storage Temperature -65 to +100 °C
Parameter Specification Unit Condition
Min. Typ. Max.
Operating Characteristics Active Mode:VHIGH >1.8V,VLOW <0.4V;
VDD=2.75V; Temp=25°C; PIN=26dBm unless
otherwise specified.
Insertion Loss
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT
0.35 0.50 dB 824MHz to 960MHz
0.35 0.60 dB 1574MHz to 1577MHz
0.45 0.65 dB 1850MHz to 1990MHz
0.55 0.70 2170MHz to 2500MHz
Isolation
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT
18 29 dB 824MHz to 960MHz
22 24 dB 1574 MHz to 1577MHz
20 22 dB 1850MHz to 1990MHz
17 20 dB 2170MHz to 2500MHz
Return Loss
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT
19 dB 600MHz to 2500MHz, All RF ports in Insertion
Loss state.
Harmonics
Second Harmonic (2f0) 70 86 dBc f=880MHz, PIN =26dBm
70 88 dBc f=1880MHz, PIN=26dBm
Third Harmonic (3f0) 70 81 dBc f=880MHz, PIN =26dBm
70 79 dBc f=1880MHz, PIN=26dBm
IIP2
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT (Cell)
102 106 dBm Tone 1: 824MHz @ 16dBm, Tone 2: 1693MHz
@ -20dBm, Receive Freq: 869 MHz
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT (AWS)
104 108 dBm Tone 1: 1710MHz @ 16dBm, Tone 2:
3820MHz @ -20dBm, Receive Freq: 2110MHz
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT (PCS)
106 110 dBm Tone 1: 1850 MHz @ 16dBm, Tone 2:
3780MHz @ -20 dBm, Receive Freq: 1930MHz
Triple Beat Ration (TBR)
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT (Cell)
65 68 dBc VSWR=2:1; Temp = 15°C, 25°C, 60°C; Jam-
mer Freq=881.5MHz
RF1-ANT, RF2-ANT, RF3-ANT,
RF4-ANT (PCS)
65 68 dBc VSWR=2:1; Temp = 15°C, 25°C, 60°C; Jam-
mer Freq=1960MHz
0.1dB Compression (P0.1dB)
28 dBm f=900MHz
28 dBm f=1800MHz
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 EU Directive2002/95/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 9
RF1146
DS120102
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Parameter Specification Unit Condition
Min. Typ. Max.
Switching Speed
0.55 1.5 us 50% control to 10%/90%
Supply and Control Signal
Characteristics
Switch Supply Voltage (VDD) 2.50 2.75 3.30 V Continuously
Supply Current (IDD) 650 990 A At Pin=16dBm
Control Voltage
VHIGH 1.3 1.8 2.9 V
VLOW 0 0.4 V
Control Current 0.1 1 uA PIN=16dBm
4 of 9
RF1146
DS120102
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Pin Function Description
1GND
Ground
2VDD
Supply
3V2
Control Signal 2
4V1
Control Signal 1
5GND
Ground
6RF4
RF Output 4
7GND
Ground
8RF3
RF Output 3
9GND
Ground
10 GND Ground
11 ANT RF input. Connected to antenna
12 GND Ground
13 RF1 RF Output 1
14 GND Ground
15 RF2 RF Output 2
16 NC Can be left floating or grounded
PKG
BASE
GND Ground
6 of 9
RF1146
DS120102
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
General Information
Control Logic
The switch is operable in four states (see Truth table, below). The switch is designed for two modes: Active and Stand-by. These
modes are controlled by the VDD signal. When VDD is high, the switch is active.
Control Logic
Electrical Test Methods
The electrical parameters for the switch were measured on test Evaluation Board provided by the switch supplier. The test Eval-
uation Board includes means for decoupling RF signals from control signal port (shunt capacitor at control signal ports).
All measurements are done with calibration plane at switch pins. The effect of test board losses and phase delay has been
removed from the results.
Mode V1 V2 S1 S2 S3 S4
ANT-RF1 Low Low ON OFF OFF OFF
ANT-RF2 High Low OFF ON OFF OFF
ANT-RF3 Low High OFF OFF ON OFF
ANT-RF4 High High OFF OFF OFF ON
7 of 9
RF1146
DS120102
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
Application Diagram and Guidelines
The decoupling capacitors are optional and, if necessary, may be used for noise reduction. Decoupling capacitors on the con-
trol pins protect the control circuitry from possible RF leakage. DC Blocking capacitors are not needed on the RF paths as there
is no DC on the RF paths, however care should be taken to ensure that DC is not injected into the switch from external circuitry.
An ESD filter is needed to protect the switch from antenna ESD events. The filter is formed by LESD inductor and CESD capaci-
tor. The switch has a supply input to feed the built-in logic decoding.
*LESD value will depend on the level of ESD protection and the loss acceptable in a given application.
8 of 9
RF1146
DS120102
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
Board Thickness 0.0658”, Board Material FR-4
Component Layer Topside RF Layer Inner Layer 1
Inner Layer 2 Ground Plane Layer
Typical Performance Data on Evaluation Board
9 of 9
RF1146
DS120102
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Fixture losses have been de-embedded (Temp= 25°C, VDD=2.75V, VCONTROL High=1.8V, VCONTROL Low=0V)
-1.5
-1.3
-1.0
-0.8
-0.5
-0.3
0.0
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600
Insertion
Loss
(dB)
Freque ncy (MHz)
Insertion Loss
(Temp = 25°C, VDD=2.75V)
RF1146 E3.1
Average Inser tion
Loss
(Temp = 25°C,
Vdd=2.6V)
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600
Return Loss
(dB)
Frequency (MHz)
Return Loss
(Temp = 25°C, VDD=2.75V)
RF1136 E2.1
Average Ant Por t
Return Loss
(Temp = 25°C,
Vdd=2.6V)
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600
Isolation
(dB)
Frequency (MHz)
Antenna to Port Isolation
(Temp = 25°C, VDD=2.75V)
RF1136
Average Ant-
Port
Isolation
-110.0
-100.0
-90.0
-80.0
-70.0
-60.0
17 18 19 20 21 22 23 24 25 26 27
Harmonic
Level
(dBc)
Input Power (dBm)
Harmonics
(Temp=25°C, VDD=2.75v, Frequency=880MHz)
2Fo
3Fo
16. 0
18.0
20.0
22.0
24. 0
26.0
28.0
17 18 19 20 21 22 23 24 25 26 27
Output
Power
POUT
(dBm)
Input Power Pin (dBm)
Output Power versus Input Power
(Temperature=25°C, Frequency=1880MHz, VDD=2.75v)
Minimum
of Pout
