Concerned AM3715 will not have the needed Power

KnightAngel

Other Parts Discussed in Thread: AM3715, ADS5404

As I have been looking at the AM3715 and what I need it to do, I have concerns on whether it will be fast enough.

I am trying to design a pocket multi signal digital oscilloscope. The design will have a couple of different configurations. The most involved design will use (2) ADS5404 ADCs operating at their max sampling frequency and a 24 bit digital I/O interface capable of accepting or generating a 200MHz digital signal.

Additionally, I need to be able to interface with a 24 bit 480x272 TFT LCD, eMMC Flash memory, DDR RAM (any type, LPDDR, DDR, DDR2, DDR3, etc.), an SD card, and controlling various ICs utilizing both I2C High speed and SPI interfaces.

I am looking, at this point, at a multi core ARM processor + FPGA solution or a Multi core ARM + DSP solution.

What would be my best bet for getting the right processor for my system?

Any specific suggestions?

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Tidus said:
The most involved design will use (2) ADS5404 ADCs operating at their max sampling frequency and a 24 bit digital I/O interface capable of accepting or generating a 200MHz digital signal.

You will need something much faster to fulfill these requirements. The Sitara processors cannot interface this ADC directly. 200MHz GPIO functionality is also almost impossible.

0 KnightAngel over 11 years ago in reply to Biser Gatchev-XID

Intellectual 335 points

Biser Gatchev-XID said:
You will need something much faster to fulfill these requirements. The Sitara processors cannot interface this ADC directly

So I should look at something in a different family. What would you suggest?

Would I need any additional hardware to interface with a processor? LVDS Receiver, FPGA?

Biser Gatchev-XID said:
200MHz GPIO functionality is also almost impossible.

What would be a realistic functionality?

0 Biser Gatchev-XID over 11 years ago in reply to KnightAngel

TI__Guru**** 393215 points

For the GPIO pins I would expect maximum <10MHz toggle rate, depending on the software you use. For the ADC questions I suggest you turn to the High Speed Data Converters Forum.

Processors

Processors forum

Concerned AM3715 will not have the needed Power