Overview
The ST25DV02K-W1R8S3, produced by STMicroelectronics, is a dynamic NFC/RFID tag IC that combines NFC connectivity with pulse width modulation (PWM) functionality. This device is part of the ST25DV-PWM series and is compliant with ISO/IEC 15693 and NFC Forum Type 5 Tag standards. It features 2 Kbits of electrically erasable programmable memory (EEPROM) and up to two independent PWM outputs. The device is designed for various industrial applications, including lighting, motor control, and power supply units, offering a cost-optimized solution with significant bill of materials (BOM) reduction.
Key Specifications
| Parameter | Description |
|---|---|
| PWM Outputs | Up to 2 independent PWM outputs (1x PWM output for ST25DV02K-W1) |
| PWM Frequency Range | From 488 Hz to 31.25 kHz |
| PWM Resolution | 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 |
| Supply Voltage | From 1.8 V to 5.5 V, independent from contactless interface |
| Output Drive Capability | Up to 4 mA per output, adjustable for low power and low noise applications |
| Memory | 2 Kbits of EEPROM, accessible in blocks of 4 bytes each |
| Write Time | 5 ms typical write time per block |
| Data Retention | 40 years |
| Write Cycles Endurance | 100,000 write cycles at 85 °C |
| Data Protection | Up to four independent areas with flexible protection mechanism based on 32/64-bit passwords |
| Temperature Range | -40 °C to +85 °C (contactless interface), -40 °C to +105 °C (PWM interface) |
| Package | SO8 and TSSOP8, ECOPACK2 (RoHS compliant) |
Key Features
- Pulse width modulation outputs with up to two independent outputs
- No need for an external oscillator
- Independent push-pull outputs with up to 4 mA drive capability per output
- Adjustable output drive for low power and low noise applications
- Live update of PWM parameters controlled by contactless interface
- Contactless interface based on ISO/IEC 15693 and NFC Forum Type 5 Tag standards
- Supports all ISO/IEC 15693 modulations, coding, sub-carrier modes, and data rates
- Internal tuning capacitance: 28.5 pF
- TruST25 digital signature mechanism for authentication
- Flexible data protection mechanism with up to four independent areas
Applications
- Industrial applications such as lighting LED drivers and motor control
- Power supply units
- Factory programming and track & trace using RFID ISO15693
- Smartphone interface using NFC Forum Type 5
Q & A
- What is the ST25DV02K-W1R8S3 device?
The ST25DV02K-W1R8S3 is a dynamic NFC/RFID tag IC with PWM outputs, compliant with ISO/IEC 15693 and NFC Forum Type 5 Tag standards.
- How many PWM outputs does the ST25DV02K-W1R8S3 have?
The ST25DV02K-W1R8S3 has one independent PWM output.
- What is the frequency range of the PWM outputs?
The PWM frequency range is from 488 Hz to 31.25 kHz.
- What is the resolution of the PWM outputs?
The PWM resolution is 62.5 ns pulse width resolution, ranging from 15-bit resolution at 488 Hz to 9-bit resolution at 31.25 kHz.
- What is the supply voltage range for the device?
The supply voltage range is from 1.8 V to 5.5 V, independent from the contactless interface.
- What is the memory capacity of the device?
The device has 2 Kbits of EEPROM, accessible in blocks of 4 bytes each.
- How long does it take to write data to the memory?
The typical write time per block is 5 ms.
- What is the data retention period of the EEPROM?
The data retention period is 40 years.
- What is the temperature range for the PWM interface?
The temperature range for the PWM interface is from -40 °C to +105 °C.
- Is the device RoHS compliant?
Yes, the device is RoHS compliant with ECOPACK2 packaging.
