!DRDY on ADS1298 won't toggle

Jordan LeNoach

Other Parts Discussed in Thread: ADS1298

I'm trying to interface an ADS1298 to an FPGA but I can't seem to get it running for whatever reason. I set START high, !RESET high, !CS low, and CLKSEL high and turn the ADS1298 on, but !DRDY doesn't begin toggling as the data sheet says it should. !PWRDWN is tied high permanently. I've got 3V on the analog supply and 2.5V on the digital supply. Here's the ADS1298 portion of my schematics, sorry if its a little difficult to read:

http://www.filesavr.com/jwwDIJiG

I only have the first one, U9 soldered on and connected. I'm wondering if the chip might be fried. Is there an easy way to tell?

Thanks,

-Jordan

over 13 years ago

Tom Hendrick over 13 years ago

TI__Guru**** 168485 points

Hi Jordan,

Your file link comes up with 'File not Found'. If you can read back the register contents of the part, chances are it is not 'fried' - that would be the simplest way to try and verify the unit is functional.

Jordan LeNoach over 13 years ago in reply to Tom Hendrick

Prodigy 30 points

Sorry about that, try this one

http://www.filesavr.com/WcsYcQfm

I haven't tried sending/receiving any SPI data to it yet so I'll see if that works, thanks for the suggestion

-Jordan

Data converters

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!DRDY on ADS1298 won't toggle