H
Hank
- Jan 1, 1970
- 0
I want to interface a ADS1256 24 bit delta-sigma dac to a atmel mega128
microcontroller. The data sheet for the 1256 recommends:
"It is recommended to use a single ground plane for both the analog and digital
supplies. This ground plane should be shared with the bypass capacitors and
analog conditioning circuits. However, avoid using this ground plane for noisy
digital components such as microprocessors."
Only the SPI serial lines (Din, Dout, Sclk, CS) need to be connected between the
uC and the dac. What would be the best way to arrange these two ground planes
between the dac and the uC?
It is a very cool chip...I was searching for something around 16 bits, but this
8 channel 24 bit device that operates up to 30khz sample rate and has a PGA
really caught my attention. I just want to make sure I don't ruin it with a
crappy layout
Thanks,
Hank
microcontroller. The data sheet for the 1256 recommends:
"It is recommended to use a single ground plane for both the analog and digital
supplies. This ground plane should be shared with the bypass capacitors and
analog conditioning circuits. However, avoid using this ground plane for noisy
digital components such as microprocessors."
Only the SPI serial lines (Din, Dout, Sclk, CS) need to be connected between the
uC and the dac. What would be the best way to arrange these two ground planes
between the dac and the uC?
It is a very cool chip...I was searching for something around 16 bits, but this
8 channel 24 bit device that operates up to 30khz sample rate and has a PGA
really caught my attention. I just want to make sure I don't ruin it with a
crappy layout
Thanks,
Hank