This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
ADS1298 RLD lead-off detection
Part Number: ADS1298
I am able to get the Lead off status of all the Leads except RLD. For other leads I am using pull up / pull down method. And it works great so far
I am reading the data at 512 samples / sec in RDATAC (read data continuous) mode.
As per I understand from the datasheet and by going through other threads that to get RLD status we need to power down the RLD amplifier and get the status by reading the CONFIG4 register. But in order to do that I must send SDATAC command first to stop the conversion and do the above mentioned things. Am I right ?
If that is the case I really would not like to do that.
I had another idea please tell me if this works.
In the below schematic RLD_LPF / RLD_OUT (marked in Red)is connected to hardware low pass filter in turn it connects to patient. I observed that if RL lead gets loose the voltage on that pin goes to -2.5v almost immediately. So Can I monitor this pin by my host processor STM32F4 using a hosts 12 bit ADC ? and decide the lead off status independently ? Or do you see any problem with this approach ?
Applications Engineer | Precision ADCs
Are you working on a bio-potential application? Check out these helpful resources: ADS129x FAQ | ECG Online Training
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Ryan Andrews:
In reply to Winston Rodrigues:
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.