9-11
Product Description
Ordering Information
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching Applied
Si BJT
GaAs MESFET
GaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
InGaP/HBT
GaN HEMT
SiGe Bi-CMOS
RX OUT
GND
TX IN
TX/RX
ANT I/O
1
2
3
4
5
RF2436
TRANSMIT/RECEIVE SWITCH
Cordless Phones
Wireless Computer Peripherals
Wireless Security Systems
General Purpose RF Switching
Commercial and Consumer Systems
The RF2436 is a very low-cost transmit/receive GaAs
MESFET switch. The device can handle power levels as
high as +28dBm and spans a frequency range from DC
to 2500MHz. The switch will operate from power supply
voltages as low as 1.5V and as high as 6V with a CMOS
logic driver for the control input. No negative voltage is
required, and current consumption is very low. VSWR for
the active channel (transmit or receive) is 1.1:1. The
device is housed in a very small industry-standard SOT
5-lead plastic package.
Single Positive Power Supply
Low Current Consumption
1dB Insertion Loss at 900MHz
24dB Crosstalk Isolation at 900MHz
+27dBm Output P1dB
RF2436
Transmit/Receive Switch
RF2436 PCBA
Fully Assembled Evaluation Board
0
Rev A4 030122
1
1.60
+ 0.01
0.400
2.80
+ 0.20
2.90
+ 0.10
0.45
+ 0.10
3 MAX
0 MIN
0.127
0.15
0.05
1.44
1.04
Dimensions in mm.
0.950
Package Style: SOT-5
!
9-12
RF2436
Rev A4 030122
Absolute Maximum Ratings
Parameter
Rating
Unit
Supply Voltage
0 to +8.0
V
DC
Control Voltage
-1.0 to +6.0
V
Input RF Power
+30
dBm
Operating Ambient Temperature
-40 to +85
C
Storage Temperature
-40 to +150
C
Parameter
Specification
Unit
Condition
Min.
Typ.
Max.
Overall
T=25 C, V
DD
=3.0V, Freq=900MHz
Frequency Range
DC to 2500
MHz
Insertion Loss
1
2
dB
Transmit or receive mode.
Isolation
20
22
dB
Receive mode; ANT I/O to TX IN crosstalk
20
24
dB
Transmit mode; ANT I/O to RXOUT crosstalk
RX OUT VSWR
1.1:1
Receive mode.
TX IN VSWR
1.1:1
Transmit mode.
Output P1dB
+27
dBm
Output IP3
+39
dBm
Control Logic
CTRL Logic "Low" Voltage
0
V
Receive mode.
CTRL Logic "High" Voltage
0.7
V
Transmit mode.
Power Supply
Voltage
3
V
Specifications
1.5 to 6
V
Operating Limits
Current
5
10
A
Receive mode.
0.5
1
mA
Transmit mode.
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
9-13
RF2436
Rev A4 030122
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
Pin
Function
Description
Interface Schematic
1
RX OUT
Output pin for Receive mode. VSWR is 1.1:1 when Receive mode is
selected and highly capacitive when Transmit mode is selected.
2
GND
Ground connection. For best performance, keep traces physically short
and connect immediately to the ground plane.
3
TX IN
Input pin for Transmit mode. The input VSWR is 1.1:1 when Transmit
mode is selected and highly capacitive when Receive mode is
selected.
4
TX/RX
Transmit Mode/Receive Mode control pin. A "low" level chooses
Receive mode; a "high" level chooses Transmit mode. CMOS logic may
be used to drive the control input.
5
ANT I/O
Input/Output pin from/to antenna and power supply pin. This pin must
be biased with VDD through a resistor.
2436400-
1
2
3
5
4
C1
1 nF
C2
1 nF
C3
1 nF
50
strip
TX/RX
J3
ANT I/O
VDD
R1
2 k
50
strip
50
strip
J1
RX OUT
J2
TX IN
P1-3
TX/RX
GND
P1-1
C4
1
F
+
VDD
P1
1
2
3
9-14
RF2436
Rev A4 030122
Evaluation Board Layout
9-15
RF2436
Rev A4 030122
ANT to RX OUT, TX IN Terminated
Frequency Response=100MHz-3000MHz, Temp=-40C/25C/85C,
Input Power= -30dBm, V
CC
=3V,
-34.5
-34.0
-33.5
-33.0
-32.5
-32.0
-31.5
-31.0
-30.5
0.0
500.0
1000.0
1500.0
2000.0
2500.0
3000.0
3500.0
Frequency (MHz)
Output Amplitude (dBm)
+85c
+25c
-40c
+
Output Variation with Termination of Unused Port
Frequency Response=900MHz-2500MHz, Temp=25C,
Input Power= -30dBm, VCC=3V
-33.0
-32.8
-32.6
-32.4
-32.2
-32.0
-31.8
-31.6
-31.4
0.0
500.0
1000.0
1500.0
2000.0
2500.0
3000.0
Frequency (MHz)
Output Amplitude (dBm)
Unused Port
Terminated
Unused Port
Un-terminated
9-16
RF2436
Rev A4 030122
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