How to change AD5940's sampling frequency

Hi,

  With the default AFE configuration, max allowed ODR is 10Hz. 

For ODR more than this, ADC filter parameters must be changed.

If you are running the code through IDE (Keil or IAR), you may add the below code ) inside AppBIASeqMeasureGen () and add to watch “AppBIACfg.MaxODR”, to know the maximum sampling rate allowed for the set configuration.

  AppBIACfg.MeasSeqCycleCount = AD5940_SEQCycleTime();

  AppBIACfg.MaxODR = 1/((( AppBIACfg.MeasSeqCycleCount + 10) / 16.0)* 1E-6)  ; //If Sysclk is16MHz

  if(AppBIACfg.BiaODR > AppBiaCfg.MaxODR)

  {

  /* We have requested a sampling rate that cannot be achieved with the time it takes to acquire a sample.*/

AppBIACfg.BiaODR = AppBIACfg.MaxODR;

  }

Akila said:

With the default AFE configuration, max allowed ODR is 10Hz. 

thanks,Actually it already exists.But the sampling frequency does not change.so I want to know what BiaODR is for.  

Hi,

MaxODR can be increased moe than 10HZ by changing the ADC filter configuration.

It is 10Hz only for the default configuration.

BiaODR is the Output data rate set by the user.

MaxODR is the max allowed ODR calculated for the set AFE configuration.

Thanks,

So where can I change the ADC filter configuration to increase the MaxODR?

and I have increased BiaODR,,but the output data rate don't increase at all.

Hello, 

Has this issue been resolved? I have a similar problem as well. Thank you!. 

No, this question still haunts me.and What is your question?

No, this question still haunts me.and What is your question?

Very similar to your question about the sampling rate for the AD5940 Board