RF5611
3.3V, SWITCH AND LNA FRONT END SOLUTION
Package Style: QFN, 12-pin, 2mmx2mmx0.5mm
C_BT
BT
GND
9
8
7
6
Vdd
Features
ANT
10
Single Supply Voltage 3.0V to
4.5V
Integrated SP3T Switch and
LNA With Bypass
Typical gain is 12dB and
1.7dB NF in RX Mode Pin-to-
Pin
SP3T Switch Control Voltage
is 2.1V to 4.5V (3.0V Typical)
IEEE802.11b/g/n WiFi Appli-
cations
Portable Battery-Powered
Equipment
WiFi/Bluetooth
®
Combination Devices
C_RX
11
5
RX_Out
C_TX
12
1
TX_in
4
LNA_EN
2
GND
Applications
3
GND
Functional Block Diagram
Product Description
The RF5611 is designed specifically for high-performance WiFi applica-
tions in the 2.4GHz to 2.5GHz ISM band, including Personal Media Play-
ers (PMPs), digital cameras, and WiFi enabled handsets. The RF5611
integrates the LNA with bypass and the SP3T switch of a Front-End solu-
tion for WiFi and
Bluetooth
®
combination systems. The integrated match
and DC blocking capacitors on all RF Ports reduce the number of external
components, keeping cost down and utilizing minimum layout area for
implementation. The RF5611 is provided in a 2mmx2mmx0.5mm, 12-
pin QFN package. This LNA + Switch front-end solution meets or exceeds
the specification requirements of IEEE 802.11 b/g/n WiFi RF systems.
Ordering Information
RF5611
RF5611SR
RF5611TR7
RF5611PCK-410
Standard 25 piece bag
Standard 100 piece reel
Standard 2500 piece reel
Fully Assembled Evaluation Board
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
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.
DS110619
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
1 of 10
RF5611
Absolute Maximum Ratings
Parameter
DC Supply Voltage
Full Spec Compliant Temperature
Range
Storage Temperature
Antenna Port Nominal Impedance
Ruggedness Output VSWR
Stability Output VSWR
ESD - Human Body Model
ESD - CDM
LNA Input Power (no damage)
Moisture Sensitivity
Rating
5.5
-10 to +75
-40 to +150
50
10:1
5:1
500
650
5
MSL2
Unit
V
°C
°C
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.
V
V
dBm
Parameter
Compliance
Min.
Specification
Typ.
Max.
Unit
Condition
IEEE802.11b, IEEE802.11g
FCC CFR 15.247, .205, .209, EN & JDEC.
V
DD
=3.3V, LNA EN=2.85V, Temp=+25°C,
Freq=2.4GHz to 2.5GHz, unless noted other-
wise.
Operating Frequency
LNA Voltage Suppy (V
DD
)
LNA Enable Voltage (LNA_EN)
Switch Control Voltage “HIGH”
Switch Control Voltage “LOW”
LNA Bypass (LNA_EN)
Current Consumption
LNA V
DD
LNA Enable
LNA Bypass
Switch Controls
Gain
WiFi Receive Only
Simultaneous WiFi/TB
Receive (note 4)
2.4
3.0
2.7
2.4
3.3
2.85
2.5
4.5
4.5
0.2
0.2
GHz
V
V
V
V
V
V
V
mA
A
mA
uA
uA
dB
dB
dB
LNA Enabled
LNA Off
C_RX, C_TX, C_BT
C_RX, C_TX, C_BT
LNA Bypass Disabled
LNA Bypass Enabled
LNA in “On” state
LNA in “Off” state
LNA Enabled
LNA Bypass Mode
1-3uA per control line
C RX
HI
, C TX
LO
, C BT
LO
, LNA EN
HI
Measured at RX OUT (LNA EN
HI
, C RX
HI
, C BT
HI
,
C TX
LO
)
Measured at BT Port (LNA EN
HI
, C RX
HI
, C BT
HI
,
C TX
LO
)
C RX
HI
, C TX
LO
, C BT
LO
, LNA EN
LO
C BT
HI
, C RX
LO
, C TX
LO
, LNA EN
X
Measured at RX OUT (LNA EN
LO
, C RX
HI
, C BT
HI
,
C TX
LO
)
Measured at BT Port (LNA EN
LO
, C RX
HI
, C BT
HI
,
C TX
LO
)
2.7
4.5
0.2
8.5
0.7
12.5
10
1.1
10
10
9.5
6.5
-4.5
12
Insertion Loss
WiFi Bypass Mode Only
BT Receive Only
Simultaneous WiFi/BT
Bypass (note 4)
3.5
1.1
5
1.5
8
5.5
dB
dB
dB
dB
2 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110619
RF5611
Parameter
Noise Figure
WiFi Rx Mode Only
BT RX Only
Simultaneous WiFi/BT RX
(note 4)
Return Loss
WiFi RX Mode Only
BT RX Only
Transmit Port
Antenna Port (WiFi RX
Mode)
Other Parameters
Input/Output Impedance
Passband Ripple
Switch P1dB
Isolation TX to BT
25
-0.2
28
28
50
+0.2
dB
dBm
dB
Measured at BT port while in TX Mode
(C_TX=2.8V, LNA_EN=0V, C_RX=0V,
C_BT=0V)
Measured at RX port while in TX Mode
(C_TX=2.8V, LNA_EN=0V, C_RX=0V,
C_BT=0V)
(note 1)
All RF Ports (note 2)
All modes
5
5
10
10
dB
dB
dB
dB
Measured at RX OUT
Measured at BT Port
Measured at TX IN
Measured at ANT Port under load conditions
2.2
1.1
2.8
1.5
5.5
dB
dB
dB
Measured at RX OUT (LNA EN
HI
, C RX
HI
, C BT
HI
,
C TX
LO
)
Including switch, LNA EN
HI
Min.
Specification
Typ.
Max.
Unit
Condition
TX to RX
20
dB
Switch Control Speed
50
ns
Note 1: The switch must operate with gated bias voltage input at 1% to 99% duty cycle.
Note 2: No external matching components.
Note 3: Values to be agreed to upon characterization data review.
Note 4: The FEM can be placed in transmit/receive WiFi and Bluetooth modes simultaneously with increased insertion loss.
Switch Control Logic
Switch Controls
MODE
WL RX only
WL RX Bypass
BT only
TX only
Simultaneous
WL/BT RX
C BT
LOW
LOW
HIGH
LOW
HIGH
C RX
HIGH
HIGH
LOW
LOW
HiGH
C TX
LOW
LOW
LOW
HIGH
LOW
LNA EN
HIGH
LOW
LOW
LOW
HIGH
DS110619
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
3 of 10
RF5611
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Function
TX IN
GND
GND
LNA EN
RX OUT
VDD
GND
BT
C BT
ANT
C RX
C TX
Description
RF input for the 802.11b/g PA. TX port includes integrated DC-block and 50match.
Ground.
Ground.
This pin enables the LNA. A logic HIGH enables the LNA.
Receive port for 802.11b/g band. RX output includes integrated DC-block and 50 match.
Supply voltage to the LNA.
Ground.
RF bidirectional port for Bluetooth
TM
. BT port includes integrated DC-block and 50 match.
Bluetooth
TM
mode control voltage. See switch truth table for proper level.
This is the common port (antenna). Antenna port includes integrated DC-block and 50match.
Receive mode control voltage. See switch truth table for proper level.
Transmit mode control voltage. See switch truth table for proper level.
Package Drawing
Top View
Note: Pads are NiPdAu plated.
4 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110619
RF5611
RF5611 PCB Footprint and Stencil Recommendations
DS110619
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
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