Error rate of capacitor between EXT_CAP and Vss

Hi Azki ,

  is currently checking this query and will get back to you soon.

Best Regards,

Den

Thank you Den, appreciated ;-)

Hi Azki,

We do not have data regarding the error rate of the capacitance. I have few questions regarding your setup. what is your Vdd and Vss? What is your capacitor voltage rating? You can increase the voltage rating of your capacitor as having a lower voltage rating can affect the capacitance of the capacitor. How does the board fail? What do you do before it fails?

Best Regards,

Yokki

Hi Yokki,

Thank you so much for your support.

Vdd: 5V
Vss: 0V
Voltage rating: 16V

So I thing the voltage rating is enough for AD5271...

I'm using two AD5271 in parrarell, one for control brightess of LED, and the rest for control sensitivity of photo diode.
Unfortunatelly, there is no signes before is fails, the AD5271 for PD is suddenly fell into uncontrolable state.
The sequence of my software is below:
1. Send Commnand 1(0x4xx) to update RDAC value.
2. Send Commnand 2(0x800) to read RDAC value.
3. Send Commnand 0(0x000) to read data from DIN(must be RDAC value).
In the case of failure, data from DIN at step 3 is 0x3FFF (because of 2 bits right-shift).

B.R.

Azki

Hi Azki,

When it fails, what is the capacitance of your capacitor?

Best Regards,

Yokki