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ADS1298: The trigger rate of ads sampling rate is insufficient

Part Number: ADS1298

Dear Expert

1. Register configuration: (detailed program in the compressed package)


2. Because the program has the problem of losing points, the modification program is only triggered to read data. No other operation is required.
Capture the pulse change of the drdy pins using a logic analyzer.
The results are as follows:
250 hz sampling rate:

The obtained pulse shows that the sampling rate is 250hz, but the actual sampling rate is only about 246hz, which is less than 250 Hz.

500 hz sampling rate:

The obtained pulse shows that the sampling rate is 500hz, but the actual pulse sampling rate is only about 493hz, less than 500hz.

1000 hz sampling rate:

The obtained pulse shows that the sampling rate is 1000hz, but the actual pulse sampling rate is only about 986hz, which cannot reach 1000hz.