Capture data from high-speed ADC

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Capture data from high-speed ADC

Unread postby yur » Wed Sep 13, 2017 11:37 pm

Dear Hardkernel Team,

What Odroid device would you recommend to use for building the system, which must capture the data flow from the external high-speed ADC, and forward it to the Gbit ethernet?

The ADC variants (alternatives):
* ADS1675 (4MSPS, 24-bit, SPI-like serial interface): http://www.ti.com/lit/ds/symlink/ads1675.pdf
* AD7760 (2.5MSPS, 24-bit, parallel interface): http://www.analog.com/media/en/technica ... AD7760.pdf

We considered Odroid-C2, but it has no SPI, and no external parallel interface. Odroid-XU4 has SPI, but according to your wiki the maximum baurate there is limited to 0.5Mbit/sec.

Thanks in advance,
Yuri
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Re: Capture data from high-speed ADC

Unread postby odroid » Fri Sep 15, 2017 8:29 am

XU4 SPI bus can handle 20~30Mbps.
500Kbps should be I2S bus.

BTW, 4MSPS * 24bit is very close to 100Mbps.
SPI can't handle 100Mbps.
Consider using a USB 3.0 interface on XU4 to get near 1000Mbps(1Gbps) of data acquisition.
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