1.6 watt capable NFC reader Ics from STMicro drive antenna directly
Date: 10/06/2022
The new NFC reader ICs ST25R3916B-AQWT and ST25R3917B-AQWT from STMicroelectronics deliver high output power of 1.6W RF output power and can drive antennas directly at high efficiency.
These competitively priced chips support NFC initiator, target, reader, and card-emulation modes, they can be used in contactless-payment, device-pairing, wireless-charging, brand protection, and other industrial and consumer applications.
"The new devices introduce improved active wave shaping (AWS) with increased flexibility that simplifies adjustment of the RF output to optimize overshoot and undershoot. The setup can be done easily by register settings supported by a graphical tool and quickly validated with an oscilloscope. This eases certification according to EMVCo 3.1a and NFC Forum CR13 specifications without the need to touch the matching of the antenna.", explains ST.
Design engineers can keep the radiated power between the upper and lower limits due to ST25R3916B and the ST25R3917B featuring dynamic power-output (DPO) adjustment matching EMVCo and the NFC Forum specifications.
ST25R3916B/17B highly immune to interference from other nearby equipment such as power supplies and POS terminals. Both devices offer a high level of resistance to both radiated noise and conducted noise.
The ST25R3916B/17B Ics offer a wide power-supply voltage range, from as low as 2.4V to 5.5V and operating temperatures from -40°C to 105°C. The peripheral I/O circuitry can operate from as little as 1.65V.
Free samples of the ST25R3916B-AQWT and ST25R3917B-AQWT are available now on ST eStore in 32-lead VFQFPN 5mm x 5mm x 1mm package and 36-bump wafer-level chip-scale package (WLCSP) options.
For more information visit www.st.com/st25r3916b
