Generating -5V ; 0V ; 5V at 200kS/s

[CyGa]

Hi!
I need to generate 3 voltage levels (-5V ; 0V ; 5V) on 32 outputs at a speed of 200kS/s on each output.
The best would be to use a FPGA card, so I could re-use it in the future for other application but the difficulty is to generate the -5V. All DACs I've seen aren't fast enough to meet my requirements...
Which card would you choose ?

[BruceAmmons]

You could use an FPGA analog output, but you would need four FPGA cards since each only has 8 AOs.  There are some AO waveform boards that comoe close to what you want, but they can only do 180 kHz with 8 channels, and you would still need 4 boards.  These are both fairly expensive solutions.

I wonder how difficult it would be to build a custom circuit to sum or combine two digital signals to get your desired outputs.  You could get the different levels by turning on 0, 1, or 2 digital signals, and it would use a total of 64 DOs.  I'm no expert on building circuits, but it seems like this would be a fairly simple circuit to build.  You could create the signals using either a digital FPGA or a high speed digital board, which is fairly cheap.

Bruce

[R_Duval]

Hello!

You should phone to the NI commercial service.

They will advice on the choice of your board.

Regards.