NXP – Smart NFC healthcare sensors perform wireless monitoring of patients


NXP Semiconductors has launched two NTAG SmartSensor chips for temperature logging and efficient medication delivery, extending its family of NFC ICs used in healthcare products and in industrial, logistics and consumer applications.

Both the NHS3100 and NHS3152 are compact smart sensors containing an ISO 14443 type A NFC/RFID interface and an ARM® Cortex®-M0+ processor core which can be used to implement custom firmware, or be programmed with off-the-shelf firmware. They also have an I2C interface for communication with a host controller.

The NHS3100 is optimised for temperature monitoring and logging and features the embedded NFC interface alongside an internal temperature sensor and a direct battery connection. The pre-calibrated temperature sensor is accurate to ±0.3°C over the temperature range 0°C to 40°C and to ±0.5°C over the full temperature range of -40°C to 85°C.

Designers can realise an effective temperature monitoring circuit with just the NHS3100 and very few external components.

The NHS3100 draws very little energy from the battery, thanks to its multiple power-down modes and a selectable core frequency up to a maximum of 8MHz.

NXP’s NHS3152 is for therapy adherence monitoring and logging, which allows the physician to check whether patients maintain a prescribed course of medication.

As well as an embedded NFC interface, the NHS3152 includes a resistive-network sensor interface, the same accurate temperature sensor as the NHS3100, and a direct battery connection. The ICs may be powered either by battery or by harvesting energy from the transmissions of NFC readers.


  • 32kbytes of Flash
  • 4kbytes of EEPROM
  • 8kbytes of SRAM
  • Up to 12 GPIOs
  • Integrated power-management unit
  • 50nA power-down current


  • Temperature measurement
  • Temperature logging
  • Therapy adherence
  • Cold-chain validation
  • Smart logistics
  • Smart packaging
  • Animal tagging

The NHS3100 Starter Kit includes an NHS3100 temperature-monitoring demonstration board, an LPC-Link 2 board and a cable. Firmware developed on this starter kit may be re-used in production designs.

Orderable Part Number: NHS3100TEMOADK