Datasheet RF2436, RF2436PCBA Datasheet (RF Micro Devices)

RF2436

9

Typical Applications

• Cordless Phones

• Wireless Computer Peripherals

• Wireless Security Systems

Product Description

The RF2436 is a very low-cost transmit/receive GaAs
MESFET switch. The device can handle power levels as
high as +28 dBm 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.

TRANSMIT/RECEIVE SWITCH

• General Purpose RF Switching

• Commercial and Consumer Systems

2.90

+0.10

3° MAX

0° MIN

+0.01

0.950

1.60

1

2.80

+0.20

0.45

+0.10

0.400

0.127

0.15

0.05

1.44

1.04

Dimensions in mm.

9

Optimum Technology Matching® Applied

Si BJT GaAs MESFETGaAs HBT
Si Bi-CMOS

RX OUT

GND

TX IN

SiGe HBT

1

2

3

ü

Si CMOS

54ANT I/O

TX/RX

Functional Block Diagram

Package Style: SOT-5

Features

• Single Positive Power Supply

• Low Current Consumption

• 0.5dB Insertion Loss at 900MHz

• 24dB Crosstalk Isolation at 900MHz

• +27dBm Output P1dB

Ordering Information

RF2436 Transmit/ReceiveSwitch
RF2436 PCBA Fully Assembled Evaluation Board

RF Micro Devices, Inc.
7625 ThorndikeRoad
Greensboro,NC 27409, USA

Tel [phone]

Fax [phone]

http://www.rfmd.com

SWITCHES

ATTENTUATORSAND

Rev A2 010717

9-23

RF2436

Absolute Maximum Ratings

Parameter Rating Unit

Supply Voltage 0 to +8.0 V
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

DC

Caution! ESD sensitive device.

RF Micro Devices believes the furnished information is correctand accurate
at the time ofthis 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).

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Parameter

Min. Typ. Max.

Overall

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

RX OUT VSWR 1.1:1 Receive mode.
TX IN VSWR 1.1:1 Transmit mode.
Output P1dB +27 dBm
Output IP3 +39 dBm

Specification

20 24 dB Transmit mode; ANT I/O to RXOUT crosstalk

Unit Condition

T=25 °C, VDD=3.0V,Freq=900MHz

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 µA Receive mode.

0.5 1 mA Transmit mode.

SWITCHES

ATTENTUATORSAND

9-24

Rev A2 010717

RF2436

Pin Function Description Interface Schematic

1RXOUT
2GND
3TXIN

4TX/RX

5ANTI/O

Output pin for Receive mode. VSWR is 1.1:1 when Receive mode is
selected and highly capacitive when Transmit mode is selected.

Ground connection. For best performance, keep traces physically short
and connect immediately to the ground plane.

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.

Transmit Mode/Receive Mode control pin. A “low” level chooses
Receive mode; a “high” levelchoosesTransmitmode. CMOS logic may
be used to drive the control input.

Input/Output pin from/to antenna and power supply pin. This pin must
be biased with VDD through a resistor.

Evaluation Board Schemati c

(Download Bill of Materi als from www.rfmd.com.)

P1

P1-1 VDD

1

GND

2

J1

RX OUT

J2

TX IN

50 Ωµstrip

50 Ωµstrip

C1

1nF

C2

1nF

P1-3 TX/RX

1

2

3

3

C3

1nF

5

R1

2kΩ

4

2436400-

50 Ωµstrip

J3

ANT I/O

VDD
TX/RX

9

SWITCHES

ATTENTUATORSAND

Rev A2 010717

9-25

RF2436

Evaluation Board Layout

9

SWITCHES

ATTENTUATORSAND

9-26

Rev A2 010717

RF2436

ANT to RX OUT, TX IN Terminated

-30.5

-31.0

-31.5

-32.0

-32.5

-33.0

Output Amplitude (dBm)

-33.5

-34.0

-34.5

Frequency Response=100MHz-3000MHz, Temp=-40°C/25°C/85°C,

0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 3500.0

Input Power=-30dBm, V

=3V,

CC

+

Frequency (MHz)

+85c
+25c

-40c

Output Variation with Termination of Unused Port

Frequency Response=900MHz-2500MHz, Temp=25°C,

-31.4

-31.6

-31.8

-32.0

-32.2

-32.4

Output Amplitude (dBm)

-32.6

-32.8

-33.0

0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0

Input Power= -30dBm, VCC=3V

Unused Port
Terminated

Unused Port
Un-terminated

Frequency (MHz)

9

SWITCHES

ATTENTUATORSAND

Rev A2 010717

9-27

ATTENTUATORSAND

SWITCHES

9-28

9

RF2436

Rev A2 010717