Application: Find my tag
Customer: SHENZHEN FEASYCOM TECH CO LTD
Hi,
Feedback 1: C35 should be 2.2 nF on DECRF pin.
Feedback 2: Add a 3.9 pF capacitor at nRESET, placed right at the pin, as in the reference. See image below.
Reference below,
Feedback 3: The ANT matching network does not match Nordic’s reference. The first series inductor is missing, and the component values differ. Copy the reference as shown below.
Reference below,
Feedback 4: Both pin 5 (P1.04) and pin 6 (P1.05) are labelled UARTE20_TXD. One of them must be UARTE20_RXD.
Feedback 5: The NFC net labels are crossed. Pin 3 (P1.02/NFC1) goes to net NFC2, and pin 4 (P1.03/NFC2) goes to net NFC1.
Feedback 6: Typo on pin 21
Rest of the schematic looks fine. Make sure the footprint is close to our reference schematic, most important for the ANT network and the supply. If you can send me the datasheet for the crystals, I can check them too.
Best regards,
Nissanth Karunanithy
