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NFC smart sensor IC

ams has introduced the AS39513, an NFC sensor tag and data logger IC for smart labels which will enable more efficient and accurate monitoring of the condition of assets such as food and healthcare products in storage and in transit.

The device is a complete digital sensor with an NFC front end that can be integrated into smart labels. A unique ID as well as logged temperature and other data stored in its internal memory can be read by any authorised NFC reader.

The AS39513 includes an NFC front end, a temperature sensor and an analogue interface to an external sensor. Other integrated functions include a real-time clock, a 10-bit ADC, a configurable data-logging engine, a 9kbit password-protected EEPROM and a serial peripheral interface (SPI) to connect to an external microcontroller.

The AS39513 is available as a bumped die or in a chipscale package which is 0.3mm high.

Powered by a single-cell (typically 1.5V) or dual-cell (3V) battery, the device can store up to 1,020 time-stamped sensor measurements. Fully compliant with ISO15693 and NFC-V (T5T) standards, it can be read over a range of a few centimetres with an NFC mobile phone. An extended read range of 1-2m can be achieved when using dedicated ISO15693 readers, offering the ability to read multiple AS39513 tags simultaneously in cabinets or refrigerators.

The AS39513 offers guaranteed accuracy of ±0.5°C in the critical range from -20°C to 10°C, and ±1°C over an extended range from -20°C to 55°C.

Its integrated temperature sensor makes it suitable for use in cold-chain monitoring products such as smart labels used in the food, pharmaceuticals and healthcare sectors. It is powered by the ams Cool-Log engine, which allows for full control and configuration of logging modes and timings. Temperature measurements can be taken at fixed intervals, or triggered when the temperature crosses a set threshold, or by a signal from an external device.

The Cool-Log engine offers operational flexibility and ultra-low power consumption without the need for a microcontroller. Drawing just 2µA of stand-by current, the AS39513 can autonomously log temperature data for more than a year on a 30mAh single-cell battery.

The chip operates in passive mode and harvests energy from a reader’s incoming RF field, supplying external circuitry with a current of up to 3mA at 1.8V.

The AS39513 is available in production volumes now.

Author
Neil Tyler

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Websites

http://www.ams.com

Companies

AMS AG

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