**note** Customer is using TRF7962RHB, but part number was not available for entry so input TRF7962A
Hi Team,
My customer is using the RFID reader IC fo their product, but they have been facing issues in the field, where the RFID is not being read.
Situations in the field that this issue has occurred in:
- Around 5% of the time, the RFID tag is not being read
- It happens in cold seasons
- Happens often for devices received after March 2022
- The frequency is increasing yearly (this years winter season has a higher error rate compared to last year)
They have investigated the following about the devices that produce read errors:
- Happens approx. 1/10 times when receiving from tag, and a CRC error or framing error occurs
- The correlation between temperature and error frequency is clear, as errors do not occur below 40℃, and the lower the temperature is the higher the probability of this error occurring
- Error occurs on reader board, where they have some surrounding ICs and pattern coil
- They checked the receiving signal from the tag (RX_IN1) with the oscilloscope, but there was no big difference between normal operations and when it produced an error
- They wanted to figure out which devices are causing error by using and icer and lower temperature, and were able to determine that the TRF device and the surrounding crystal oscillator seemed suspicious, but could not specifically diagnose the cause.
Why is it causing this error and how can they determine which ones will cause error?
Best regards,
Mari Tsunoda