ad5941 ocp measurement

Hi,

You may change the ADC mux inputs as shown below and monitor the output keeping RE0 and SE0 Open circuited.

In AppIMPSeqCfgGen() function,

dsp_cfg.ADCBaseCfg.ADCMuxN = ADCMUXN_HSTIA_N; //Replace with ADCMUXN_AIN3. You may short RE0 to AIN3.
dsp_cfg.ADCBaseCfg.ADCMuxP = ADCMUXP_HSTIA_P; //Replace with ADCMUXP_VSE0

Hi,

I am using CN0510 which includes AD5941BATZ and the battery we wan to test has no RE, is it still applied?

Hi,

Only the +ve and -ve terminals of the battery are required to be connected. No RE is required.

But is the code change would work with the BATZ EVAL board? As the BATZ board does not have any way of measuring the DC voltage over the battery. All ADC inputs are AC coupled. And RE is not connected. 

Hi,

Apologies. I am not sure what your question is.

Below is the block diagram of AD5940BATZ board:

Do you want to measure voltage supplied by the battery?

If so, you may set in the code,

dsp_cfg.ADCBaseCfg.ADCMuxN = ADCMUXN_AIN3;
dsp_cfg.ADCBaseCfg.ADCMuxP =ADCMUXP_VCE0;

to measure the voltage.

Thanks for your reply. But no, it's the open circuit potential of battery I want to know

Thanks for your reply. But no, it's the open circuit potential of battery I want to know

Hi,

  If you want to measure just the open potential drop across the battery, in A5940BATZ, this drop is across AIN2 and AIN3 inputs.

Hence 

If so, you may configure ADC mux as below:

dsp_cfg.ADCBaseCfg.ADCMuxN = ADCMUXN_AIN3;
dsp_cfg.ADCBaseCfg.ADCMuxP =ADCMUXP_AIN2;

This way, open circuit potential across the battery can be measured.