Features
• Low-thermal resistance: 35 °C/W
• Suitable for 100 W Continuous Wave T/R switches
• Low capacitance: 0.3 pF
• Low distortion performance
• QFN (3-pin, 2 x 2 mm) package (MSL1, 260 °C per JEDEC J-STD-020)

Description
The SMP1304-085LF is a surface mountable, low capacitance silicon PIN diode designed as a shunt connected PIN diode for high power, high volume switch and attenuator applications from 10 MHz to beyond 6 GHz. Maximum resistance at 100 mA is 2 Ω and maximum capacitance at 30 V is 0.3 pF. The combination of low junction capacitance, low parasitic inductance, low thermal resistance, and nominal 100 μm I-region width, makes the SMP1304-085LF useful in large signal switches and attenuator applications. The device has a 2.5 W dissipation power rating, making it capable of handling more than 100 W Continuous Wave (CW) and 1000 W peak (1 μs pulse, 1 percent duty cycle) in a shunt-connected transmit/receive (T/R) switch. Design information for high power switches may be found in the Skyworks Application Note, Design With PIN Diodes (document number 200312). A block diagram of the SMP1304-085LF is shown in Figure 1.