AFE4900EVM: AFE4900 EVM, ECG DATA does not come out like samples

HAN DONGHO

Part Number: AFE4900EVM
Other Parts Discussed in Thread: AFE4900

In the AFE4900 EVM, ECG DATA does not come out like samples, but like noise. Can you confirm which settings are working fine?

Even if you change various setting values and jumpers by directly contacting the ECG input terminals INM_ECG and INP_ECG, it is difficult to check because there is still a lot of noise.

As for the condition, it would be appreciated if you could tell us the setting value to check the ECG waveform.

over 2 years ago

+1 Praveen Aroul over 2 years ago

TI__Mastermind 49176 points

Hello Han,

We would like to take this discussion offline since the device AFE4900 is shared under selective disclosure.

Can you please reach out to biosensing_afe-support@list.ti.com along with a reference to this E2E post?

The EVM default settings should be sufficient to capture the ECG data. Run the laptop (to which the EVM is connected) on battery and not on mains power to avoid noise pickup from the mains.

+1 HAN DONGHO over 2 years ago in reply to Praveen Aroul

Prodigy 30 points

I switched to battery mode and operated, so the noise was reduced a lot, 

but Waveform changes can be detected at low frequencies, but at frequencies above 200Hz, there is a lot of noise and it is difficult to check the measured values.

I want to set it to 1Khz or 2Khz or higher for ECG accuracy. Is there any use case like this?

0 HAN DONGHO over 2 years ago in reply to Praveen Aroul

Prodigy 30 points

yes

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AFE4900EVM: AFE4900 EVM, ECG DATA does not come out like samples