Convert the analog signal output of the PCIe-6733 board to an SMA connector.

[Jude Green]

Hello. I am building an analog signal output system for ultracold atom experiments. I plan to use a PCIe-6738 to generate signals, and use an SHC68-68-A2 cable to connect the signals to an SCB-68A breakout box to separate the 32 analog channels. My question is: after the signals come out of the SCB-68A, can I directly connect them to my load via SMA connectors, without adding any additional protection circuitry for the PCIe-6738? Would such a direct connection affect signal accuracy or shorten the lifespan of the device?

[santo_13]

It all depends on what you connect to on the other end.

[Jude Green]

Do I need to calculate the loop current based on the load resistance? Regardless, does NI have any recommendations or manuals for designing such a circuit?

[Henrik_Volkers]

The spec tell you +-10 mA in four quadrat  (you can sink and source up to 10 mA)

Nowbody else than you know the (complex) impedance network you want to drive or other external sources that are involved....

Maxwell (this old guy with his 4 laws 😉 ) will answer you your questions

(and maybe the are easy ways and shotcuts ... but who knows?  Maybe you? )

[rolfk]

Your inquiry is very unclear. SMA for me is mainly a specific type of mini-coax connector. It could also stand for Semiconductor Manufacturers' Association, Surface Mount Assembly, System Management Application, SNA Measurement Assembly and several dozen other things.

Assuming it is most likely a connector tells us still nothing. Is it connected to a high impedance amplifier input, or something else? Is the input range of the amplifier within +-10V, or is it a low voltage input? Or something else? Is there any chance those SNA connectors can ever get in contact with high voltage such a your mains, or some lightning or similar?