ADS1298R: I am experiencing an issue with the ADS1298 signal graph.

Batuhan Kngr

Part Number: ADS1298R
Other Parts Discussed in Thread: ADS1298

Hello,

I've configured the register values for ADS1298 as shown below. I don't have any issues with initializing the ADS1298, and when I read the register values, they appear correctly.

reg:0x01, value: 0x86

reg:0x02, value: 0x02

reg:0x03, value: 0xCE

reg:0x04, value: 0x03

reg:0x05, value: 0x00

reg:0x06, value: 0x00

reg:0x07, value: 0x00

reg:0x08, value: 0x00

reg:0x09, value: 0x00

reg:0x0A, value: 0x00

reg:0x0B, value: 0x00

reg:0x0C, value: 0x00

reg:0x0D, value: 0x03

reg:0x0E, value: 0x01

reg:0x0F, value: 0xFF

reg:0x10, value: 0x02

reg:0x11, value: 0x00

reg:0x12, value: 0x00

reg:0x13, value: 0x03

reg:0x14, value: 0x04

reg:0x15, value: 0x01

reg:0x16, value: 0x00

reg:0x17, value: 0x02

reg:0x18, value: 0x09

reg:0x19, value: 0xC2

After initiating the device, I plot the data sent by the ADS1298 as a graph. However, I'm facing a problem. In the graph, there are square waves highlighted in red. These square waves appear even when I haven't connected any cables to the analog input of the ADS1298. The ADS1298 sends "FF" and "7F" values to me, and I observe a continuous square wave when there is no cable connected to the analog input.

However, when I connect a cable to the analog input, it seems to interfere with my signal. Can you assist me with this issue?

7 months ago

0 Praveen Aroul 7 months ago

TI__Mastermind 49666 points

Hello,

Are you able to verify the register settings on the ADS1298 EVM?

Reg 0x13 shows value of 0x03. Is it during the condition when the cable was disconnected?

0 Batuhan Kngr 7 months ago in reply to Praveen Aroul

Prodigy 40 points

Thank you very much for your response.

When the cable is disconnected: 0x06

When the cable is connected : 0x00

I am observing these values.

0 Praveen Aroul 7 months ago in reply to Batuhan Kngr

TI__Mastermind 49666 points

Are you able to verify the register settings on the ADS1298 EVM? Do you see any issues?

0 Batuhan Kngr 7 months ago in reply to Praveen Aroul

Prodigy 40 points

When I read the values I wrote to the register addresses, I don't see any issues. If we are sure that the value obtained from the 0x13 register address is correct, I don't see any other problems.

0 Stuart McCutchen 7 months ago in reply to Batuhan Kngr

TI__Prodigy 560 points

Hi,

Praveen is currently out of office for the next couple of weeks. I apologize of the inconvenience. Please allow a few weeks delay.

0 Batuhan Kngr 7 months ago in reply to Stuart McCutchen

Prodigy 40 points

Hi,

No worries about the delay. I appreciate the heads up. I'm looking forward to your response when Praveen is back. Thanks!

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ADS1298R: I am experiencing an issue with the ADS1298 signal graph.