RF2436 0 TRANSMIT/RECEIVE SWITCH Typical Applications * Cordless Phones * General Purpose RF Switching * Wireless Computer Peripherals * Commercial and Consumer Systems * 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 +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. 1.60 + 0.01 0.15 0.05 0.400 1 2.90 + 0.10 0.950 2.80 + 0.20 3 MAX 0 MIN 1.44 1.04 Dimensions in mm. 0.127 0.45 + 0.10 Optimum Technology Matching(R) Applied ! Si BJT GaAs HBT Si Bi-CMOS SiGe HBT Si CMOS InGaP/HBT GaN HEMT SiGe Bi-CMOS Package Style: SOT-5 GaAs MESFET Features * Single Positive Power Supply * Low Current Consumption * 1dB Insertion Loss at 900MHz * 24dB Crosstalk Isolation at 900MHz * +27dBm Output P1dB RX OUT 1 5 ANT I/O GND 2 TX IN 3 4 TX/RX Ordering Information RF2436 RF2436 PCBA Functional Block Diagram Rev A4 030122 Transmit/Receive Switch Fully Assembled Evaluation Board RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 9-11 RF2436 Absolute Maximum Ratings Parameter Supply Voltage Control Voltage Input RF Power Operating Ambient Temperature Storage Temperature Parameter Rating Unit 0 to +8.0 -1.0 to +6.0 +30 -40 to +85 -40 to +150 VDC V dBm C C Specification Min. Typ. Max. 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). Unit T=25 C, VDD =3.0V, Freq=900MHz Overall Frequency Range Insertion Loss Isolation RX OUT VSWR TX IN VSWR Output P1dB Output IP3 Condition 20 20 DC to 2500 1 22 24 1.1:1 1.1:1 +27 +39 2 MHz dB dB dB Transmit or receive mode. Receive mode; ANT I/O to TX IN crosstalk Transmit mode; ANT I/O to RXOUT crosstalk Receive mode. Transmit mode. dBm dBm Control Logic CTRL Logic "Low" Voltage CTRL Logic "High" Voltage 0 0.7 V V Receive mode. Transmit mode. 3 1.5 to 6 5 0.5 V V A mA Specifications Operating Limits Receive mode. Transmit mode. Power Supply Voltage Current 9-12 10 1 Rev A4 030122 RF2436 Pin 1 Function RX OUT 2 GND 3 TX IN 4 TX/RX 5 ANT I/O Description Interface Schematic 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" level chooses Transmit mode. 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 Schematic (Download Bill of Materials from www.rfmd.com.) P1 P1-1 + C4 1 F P1-3 J1 RX OUT J2 TX IN 50 strip VDD 2 GND 3 TX/RX C1 1 nF C3 1 nF 1 50 strip 1 C2 1 nF 5 50 strip J3 ANT I/O R1 2 k 2 VDD 3 4 TX/RX 2436400- Rev A4 030122 9-13 RF2436 Evaluation Board Layout 9-14 Rev A4 030122 RF2436 ANT to RX OUT, TX IN Terminated Output Variation with Termination of Unused Port Frequency Response=100MHz-3000MHz, Temp=-40C/25C/85C, Input Power= -30dBm, VCC=3V, -30.5 Frequency Response=900MHz-2500MHz, Temp=25C, Input Power= -30dBm, VCC=3V -31.4 +85c Unused Port Terminated +25c -40c -31.0 -31.6 -31.8 Output Amplitude (dBm) Output Amplitude (dBm) -31.5 Unused Port Un-terminated -32.0 -32.5 + -33.0 -32.0 -32.2 -32.4 -33.5 -32.6 -34.0 -32.8 -34.5 -33.0 0.0 500.0 1000.0 1500.0 2000.0 Frequency (MHz) Rev A4 030122 2500.0 3000.0 3500.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 Frequency (MHz) 9-15 RF2436 9-16 Rev A4 030122