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| RF2436 9 Typical Applications * Cordless Phones * Wireless Computer Peripherals * Wireless Security Systems * General Purpose RF Switching * Commercial and Consumer Systems TRANSMIT/RECEIVE SWITCH 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 0.400 1 0.15 0.05 2.90 + 0.10 0.950 2.80 + 0.20 3 MAX 0 MIN 0.45 + 0.10 0.127 1.44 1.04 Dimensions in mm. 9 ATTENTUATORS AND SWITCHES Optimum Technology Matching(R) Applied Si BJT Si Bi-CMOS GaAs HBT SiGe HBT u Package Style: SOT-5 GaAs MESFET Si CMOS Features * Single Positive Power Supply * Low Current Consumption * 0.5dB Insertion Loss at 900MHz * 24dB Crosstalk Isolation at 900MHz * +27dBm Output P1dB RX OUT 1 GND 2 TX IN 3 5 ANT I/O 4 TX/RX Ordering Information RF2436 RF2436 PCBA Transmit/Receive Switch Fully Assembled Evaluation Board Functional Block Diagram RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com Rev A2 010717 9-23 RF2436 Absolute Maximum Ratings Parameter Supply Voltage Control Voltage Input RF Power Operating Ambient Temperature Storage Temperature Rating 0 to +8.0 -1.0 to +6.0 +30 -40 to +85 -40 to +150 Unit VDC V dBm C C 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). Parameter Overall Frequency Range Insertion Loss Isolation RX OUT VSWR TX IN VSWR Output P1dB Output IP3 Specification Min. Typ. Max. DC to 2500 1 22 24 1.1:1 1.1:1 +27 +39 0 0.7 3 1.5 to 6 5 0.5 Unit MHz dB dB dB Condition T=25 C, VDD =3.0V, Freq=900MHz 2 20 20 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 V V V V A mA Receive mode. Transmit mode. Specifications Operating Limits Receive mode. Transmit mode. Control Logic CTRL Logic "Low" Voltage CTRL Logic "High" Voltage Power Supply Voltage 9 ATTENTUATORS AND SWITCHES Current 10 1 9-24 Rev A2 010717 RF2436 Pin 1 2 3 4 5 Function RX OUT GND TX IN TX/RX ANT I/O Description 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. Interface Schematic Evaluation Board Schematic (Download Bill of Materials from www.rfmd.com.) P1 P1-1 1 2 P1-3 3 VDD GND TX/RX J2 TX IN 50 strip C2 1 nF 2 3 4 R1 2 k VDD TX/RX 2436400- Rev A2 010717 9-25 ATTENTUATORS AND SWITCHES J1 RX OUT 50 strip C1 1 nF 1 5 C3 1 nF 50 strip J3 ANT I/O 9 RF2436 Evaluation Board Layout 9 ATTENTUATORS AND SWITCHES 9-26 Rev A2 010717 RF2436 ANT to RX OUT, TX IN Terminated -30.5 Frequency Response=100MHz-3000MHz, Temp=-40C/25C/85C, Input Power= -30dBm, VCC=3V, Output Variation with Termination of Unused Port -31.4 +85c +25c -40c Frequency Response=900MHz-2500MHz, Temp=25C, Input Power= -30dBm, VCC=3V -31.0 -31.6 Unused Port Terminated Unused Port Un-terminated -31.5 -31.8 Output Amplitude (dBm) -32.0 Output Amplitude (dBm) 2500.0 3000.0 3500.0 -32.0 -32.5 -32.2 -33.0 + -32.4 -33.5 -32.6 -34.0 -32.8 -34.5 0.0 500.0 1000.0 1500.0 2000.0 -33.0 0.0 500.0 1000.0 1500.0 2000.0 2500.0 3000.0 Frequency (MHz) Frequency (MHz) 9 ATTENTUATORS AND SWITCHES Rev A2 010717 9-27 ATTENTUATORS AND SWITCHES 9 9-28 Rev A2 010717 RF2436 |
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