NFC Reader Meets Digital Key Release 2.0 Spec
By Mat Dirjish
For digital car-key applications, STMicroelectronics’ ST25R3920 next-gen NFC reader IC complies with the recent Digital Key Release 2.0 specification by the Car Connectivity Consortium and certified by the NFC Forum. According to its maker, the device introduces enhanced features for stronger performance, including rapid key response and extended range. Pairing Dynamic Power Output (DPO) and Noise-Suppression Receiver (NSR) technologies, the device increases RF output power and offers an enhanced input-circuit design for rapid car-key response and user convenience.
With DPO, the device operates at RF output power levels up to 1.6W continuous and 2.5W short-term input peak, to maintain reliable NFC connections over distance with a small antenna. Additionally, automatic antenna tuning compensates for changes in the RF environment to maintain the best possible connection to the user’s smartphone, and low-power key-signal detection with inductive wakeup minimizes load on the battery when the key is not in use.
The ST25R3920 is in production now. For deeper insights and wisdom, procure and peruse the ST25R3920 datasheet.
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