Operating SOI Switches with a Single Supply

Q.

Many of the RF and Microwave SOI switches require dual voltage supplies (VDD and VSS). Which of these may be operated with only a single positive supply (VDD)?

 

A.

Certain switches from the SOI portfolio may be operated using only a single positive VDD supply, and with the VSS pin grounded.

Operating the switch in such a manner has minimal effects on the small signal performance (insertion loss, isolation and return loss). However, there may be differences in the large signal (linearity - compression, intermodulation distortion, and power handling) and transient response (switching speed and settling time).

As of Mar 2023, below table summarizes the RF CW power handling of dual supply SOI switches for single supply operation:

Part Number Dual Supply CW RF Power Handling
(Vdd = +3.3V , Vss = -3.3V)		 Single Supply CW RF Power Handling
(Vdd = +3.3V , Vss = 0V)
Through Terminated Through Terminated
Non-Reflective HMC1118 35 dBm 27 dBm 27 dBm 22 dBm
ADRF5019 35 dBm 27 dBm 27 dBm 22 dBm
ADRF5020 24 dBm 24 dBm 21 dBm 21 dBm
ADRF5021 24 dBm 24 dBm 21 dBm 21 dBm
ADRF5023 30 dBm 24 dBm 15 dBm 10 dBm
ADRF5026 24 dBm 24 dBm N/A N/A
ADRF5027 24 dBm 24 dBm N/A N/A
ADRF5040 33 dBm 27 dBm 28 dBm 24 dBm
ADRF5042 24 dBm 24 dBm N/A N/A
ADRF5043 24 dBm 24 dBm N/A N/A
ADRF5044 24 dBm 24 dBm N/A N/A
ADRF5045 24 dBm 24 dBm N/A N/A
ADRF5049 30 dBm 18 dBm 15 dBm 10 dBm
ADRF5050 33 dBm 18 dBm 22 dBm 12 dBm
Reflective ADRF5024 27 dBm   21 dBm  
ADRF5025 27 dBm   21 dBm  
ADRF5046 27 dBm   N/A  
ADRF5047 26 dBm   N/A  
ADRF5144 40 dBm   30 dBm  

Note:

  • Please refer to the application note, AN-1440, for more details on single supply operation. This app note also contains single supply performance on the HMC1118.
  • The ADRF5250 has an integrated negative voltage generator. User may choose to enable or disable the NVG. Please refer to the datasheet.
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