Overview
The ST25R3914-AQWT is a highly integrated NFC initiator and HF reader IC designed by STMicroelectronics, specifically tailored for automotive applications. It is AEC-Q100 grade 1 qualified, ensuring high reliability and performance in demanding environments. This module supports various NFC and RFID standards, including ISO 18092 (NFCIP-1), ISO 14443A and B, ISO 15693, and FeliCa™. It features a robust analog front end (AFE) and a comprehensive data framing system, making it ideal for infrastructure-side NFC systems where optimal RF performance and flexibility are crucial.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency | 13.56 MHz or 27.12 MHz |
| Output Power | Up to 1 W (differential output) |
| Supply Voltage | 2.4 V to 5.5 V |
| Temperature Range | -40 °C to 125 °C |
| Package Type | VFQFPN32, 5 mm x 5 mm with wettable flanks |
| Communication Interface | 6 Mbit/s SPI with 96 bytes FIFO |
| Antenna Drivers | Two differential low impedance (1 Ω) antenna drivers |
| Detection Methods | Capacitive sensing, phase or amplitude measurement |
Key Features
- AEC-Q100 qualified for automotive applications
- Supports ISO 18092 (NFCIP-1), ISO 14443A and B, ISO 15693, and FeliCa™ standards
- Automatic antenna tuning (AAT) system for optimal antenna performance
- Automatic modulation index adjustment and AM/PM (I/Q) demodulator channels
- User selectable and automatic gain control
- Transparent and Stream modes for implementing MIFARE™ Classic and custom protocols
- Low power capacitive sensor and RC oscillator for wake-up and tag detection
- Possibility of driving two antennas in single-ended mode
Applications
The ST25R3914-AQWT is primarily designed for automotive applications, including vehicle access systems, car sharing services, and other NFC-based automotive solutions. It is also suitable for various infrastructure-side NFC applications where high RF performance and flexibility are required, such as public transportation systems, access control, and smart city initiatives.
Q & A
- What is the primary application of the ST25R3914-AQWT? The ST25R3914-AQWT is primarily designed for automotive applications.
- What NFC standards does the ST25R3914-AQWT support? It supports ISO 18092 (NFCIP-1), ISO 14443A and B, ISO 15693, and FeliCa™ standards.
- What is the output power of the ST25R3914-AQWT? The output power is up to 1 W in differential output mode.
- What is the supply voltage range of the ST25R3914-AQWT? The supply voltage range is from 2.4 V to 5.5 V.
- What is the temperature range of the ST25R3914-AQWT? The temperature range is from -40 °C to 125 °C.
- Does the ST25R3914-AQWT support low power detection methods? Yes, it supports low power capacitive sensing, phase or amplitude measurement for tag detection.
- Can the ST25R3914-AQWT drive multiple antennas? Yes, it can drive two antennas in single-ended mode.
- What communication interface does the ST25R3914-AQWT use? It uses a 6 Mbit/s SPI interface with a 96 bytes FIFO.
- Is the ST25R3914-AQWT AEC-Q100 qualified? Yes, it is AEC-Q100 grade 1 qualified.
- What package type is the ST25R3914-AQWT available in? It is available in a VFQFPN32 package, 5 mm x 5 mm with wettable flanks.
