High-Voltage Analog Switch without High-Voltage Supply

Question

I am designing a circuit where I need to sequentially test a number of devices by connecting them one at a time to my measurement equipment (a simple source measure unit). There will be a maximum of 24 devices within one batch of measurements and each device requires only one signal connection, so I was thinking to use a 32:1 or two 16:1 multiplexers to select the device under test (DUT). Each DUT is equivalent to a resistive load with resistance >1kOhm, will generally draw <1mA, but I need to be able to apply &plusmn; 60V to each DUT. At the same time I'd like to power and control the multiplexer with a simple 5V or 3.3V controller only. Are there any multiplexers with these characteristics? 
 I have seen the popular ADG732 range, but that seems to only take a signal range of 7V, well below my &plusmn; 60V requirement. I have also found the MAX14866 which seems to do just what I want, but if I understand the datasheet correctly, it has a SPST configuration where each analog input pin is individually switched with no common output. I could wire all the 'B' terminals together to get a common output, but that would be a bit cumbersome within my circuit layout. Or maybe I'm not understanding the MAX14866 properly? 
 I would really appreciate any help!

Christian · Accepted Answer

Hi dkos ,

The ADG732 is ideal for your configuration needs but only supports a voltage supply range of up to 7 V. The MAX14866 on the other hand is in SPST configuration but has a higher voltage range. While it functions as an SPST switch, its outputs can be tied together to form a multiplexer. Additionally, each switch in the MAX14866 is individually controlled via high-speed SPI, offering the necessary flexibility.

Best regards,
Christian

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High-Voltage Analog Switch without High-Voltage Supply