AD5941 Core Test

Hi, 

We have contacted the product owner and will get back to you with an answer. 

Thanks,

Jellenie

Hi,

One simple way I suggest is to connect a dummy resistor between CE0 and SE0, and run Cyclic Voltammetry test. 

As it gives ramp signal on CE0, SE0 current input will be ramp. This input in turn goes to ADC. This way, testing bit by bit can be done by appropriate Ramp settings.

Thank you for this idea but, 

These inputs will be used by the EC sensor so can't connect a resistor here in parallel it.

We are worried to change CEO if sensor is connected, it will distrib the operation of the sensor. ( we will used all types of EC sensor, polarized , non polarized, and 2 gas sensor)

Did you have another idea?

Thanks

Hi,

Are you using 2 electrodes (CE0, SE0) or three(CE0, SE0, RE0).

If you are using two electrode sensors, you may short the internal switch b/w CE0 and RE0, connect resistor between RE0 and DE0, and set DE0 as input to ADC MUX whenever ADC must be tested.

Hi,

We are using 2,3 and 4 electrodes sensors.

We have 2 ideas right now:

First using LPDAC-6bit Vzero out with SW6 and SW7 to read this output on ADC.

• We have identified some values on DAC-6 bits that can generate some ADC bytes set to 'A' or '5' after reading. We will combine these values to check all bits.

Second by changing our design and do connection with an external DAC to one of the AIN input pin of the AD594x

Do you see any problems in these 2 options?

Thanks,

Regards,

Ludovic

Hi,

These 2 options seem good. I don't see any problem in them.