Hi,
I am trying to build a delta-sigma dac using the outputs of an fpga. I need about 30mhz bandwidth and 8-10 bits. I was going to use an 8-bit r-2r ladder, but the i/o requirements are huge since i need
16 channels. The maximum output rate of the fpga pins is about 300mhz which is far to slow to get 8-10 bits@30mhz. If i use a dac larger than 1-bit could this work. Eg a 4-bit r-2r used in a delta sigma. Does anyone have the equations for frequency/amount of quantization/ output bandwidth?
Thanks,
Jon Pry