The ST25DV-PWM series of dynamic NFC/RFID tags offers a 13.56 MHz long-range interface compatible with NFC phones and readers. The ST25DV02K-W1/W2 device is an NFC/RFID tag IC with PWM outputs.
The PWM output can be programmed independently and securely, allowing a large field of application. The IC provides live update of PWM parameters by contactless interface, extending the user experience.
Contactless interface
- Based on ISO/IEC 15693 and NFC Forum Type 5 Tag
Pulse width modulation outputs
- Up to 2x independent outputs:
- 1x PWM output with ST25DV02K-W1
- 2x PWM outputs with ST25DV02K-W2 - From 488 Hz to 31250 Hz
- 62.5 ns pulse width resolution:
- From 15-bit resolution at 488 Hz to 9-bit resolution at 31.25 kHz - Accuracy: ±10% over temperature range
- No need for external oscillator
- Supply voltage from 1.8 V to 5.5 V, independent from contactless interface
- TruST25™ digital signature
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ST25DV-PWM-eSET
The ST25DV-PWM-eSET is a dynamic NFC tag evaluation board based on the ST25DV02K-W2 device, an NFC/RFID tag IC with PWM outputs embedding a 2-Kbit EEPROM that can be partitioned for use-case flexibility.
The PWM output can be programmed independently and securely, allowing the user to address a large number of applications.
- ST25DV02K-W2 Dynamic NFC/RFID tag IC with two PWM outputs and 2-Kbit EEPROM
- ST25DV02K-W1 Dynamic NFC/RFID tag IC with one PWM output and 2-Kbit EEPROM
eDesignSuite
eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.
NFC/RFID Calculators
NFC Inductance
Input geometry and substrate properties Get antenna impedance 
UHF Link Budget
Enter forward and reverse link characteristics The tool returns link budget estimate 
NFC Tuning Circuit
Enter antenna parameter and matching target Select the topology of the matching network The tool returns component values for the desired design targets