A Low-Cost 0.28 mm2 Dual-Mode ASK Demodulator NFC Forum Type 5 Compatible Fully Integrated IoT Tag
Abstract:
With the increasing prevalence of NFC-enabled smartphones, next-generation IoT devices demand contactless information interaction capabilities. This paper presents an NFC tag chip architecture for large-scale IoT applications, achieving reliable data transmission through RF coupling. Addressing the critical challenge of balancing power consumption and cost in industrial deployment, the design features a dual-mode ASK demodulator (supporting 100% and 10% modulation depth) compliant with NFC Forum Type 5 specifications, achieving ultra-low power consumption of 83.06µW through dynamic clock division and gating techniques. For cost optimization, the archi-tecture employs a byte-level anti-collision protocol for memory structure optimization and replaces conventional comparators with inverter chains. Implemented in SMIC 0.13µm EEPROM process, the compact layout of 544.24µm × 516.60µm maintains unit cost below 1 cent. Experimental results demonstrate stable communication under maximum 9.44µs modulation gap through RC-delay pulse shaping and LDO with <7% ripple. This research provides an economical and reliable hardware solution for billion-scale IoT node deployment.
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A Low-Cost 0.28 mm2 Dual-Mode ASK Demodulator NFC Forum Type 5 Compatible Fully Integrated IoT Tag
