This video appeared in Electronic Design and has been published here with permission.
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Important for the development of passive smart devices that need to operate with high accuracy, efficiency, and design convenience, NFC-based sensing controllers with energy-harvesting capabilities are critical for a wide range of IoT applications. The NGC1081 is a single-chip solution for low-cost, miniaturized, smart edge computing/sensing devices, enabling them to be controlled and powered by mobile phones.
The tag-side controller supports a dual power-supply function, operating in battery-free passive mode using energy harvesting, or in battery-powered mode as a self-contained sensing node using a 3- to 3.3-V external power supply. Its galvanically isolated sensing interface can create innovative sensing use cases that require no batteries with minimal maintenance. It's based on a low-power Arm Cortex-M0 microcontroller that's NFC front-end-compliant with the ISO 14443 type-A standard and a motor-control driver that employs an H-bridge circuit with a current drive capability of up to 250 mA.
In addition, the NGC1081 features a sensing unit based on a 12-bit SAR ADC with four analog inputs and a 10-bit DAC with one analog output. The sensing unit also comprises an I2V converter and an integrated temperature sensor that provides an accuracy of ±0.3°C over the temperature range of 0 to 45°C and ±0.4°C from –20 to 0°C and 45 to 85°C.