Overview
The ST25R3916-AQWT, manufactured by STMicroelectronics, is a high-performance NFC universal device. This component supports various NFC modes, including NFC initiator, NFC target, NFC reader, and NFC card emulation. It is designed to be fully compliant with EMVCo 3.0 analog and digital standards, making it highly suitable for Point of Sale (POS) terminal applications and other infrastructure NFC uses. The device features advanced analog front-end (AFE) and a highly integrated data framing system, enabling efficient and reliable NFC communication even in harsh environments.
Key Specifications
| Type | Description |
|---|---|
| Clock Frequency-Max | 13.56 MHz |
| Supply Current | 16 mA |
| Supply Voltage | 2.4 V to 5.5 V |
| Power Dissipation | 0.3 W |
| Operating Temperature Range | -40°C to +105°C |
| Storage Temperature Range | -65°C to +150°C |
| No of Terminals | 32 |
| Moisture Sensitivity Level | 3 |
| Package Style | VFQFPN-32 |
| Mounting Method | Surface Mount |
Key Features
- Operating modes: Reader/writer, card emulation, active and passive peer to peer.
- RF communication: EMVCo 3.0 analog and digital compliant, NFC-A / ISO14443A up to 848 kbit/s, NFC-B / ISO14443B up to 848 kbit/s, NFC-F / FeliCa™ up to 424 kbit/s, NFC-V / ISO15693 up to 53 kb/s.
- Dynamic power output (DPO) controls the field strength to stay within given limits.
- Active wave shaping (AWS) reduces over- and under-shoots.
- Noise suppression receiver (NSR) allows reception in noisy environments.
- Automatic antenna tuning (AAT) via variable capacitor.
- Integrated EMVCo 3.0 compliant EMD handling.
- Automatic gain control and squelch feature to maximize SNR.
- Low power capacitive and inductive card detection.
- Low power NFC active and passive target modes.
- Adjustable ASK modulation depth, from 5 to 40%.
- Integrated regulators to boost system PSRR.
- AM/PM and I/Q demodulator with baseband channel summation or automatic channel selection.
- Possibility to drive two independent single-ended antennas.
- Measurement of antenna voltage amplitude and phase, RSSI, on-chip supply and regulated voltages.
- External communication interfaces: 512-byte FIFO, SPI up to 10 Mbit/s, I2C with up to 400 kbit/s in Fast-mode, 1 Mbit/s in Fast-mode Plus, and 3.4 Mbit/s in High-speed mode.
Applications
The ST25R3916-AQWT is optimized for various NFC applications, particularly in POS terminals, due to its compliance with EMVCo 3.0 standards. It is also suitable for infrastructure NFC applications such as public transportation, access control, and smart home devices. The device's ability to operate in harsh environments, such as near noisy LCD displays, makes it versatile for use in a wide range of scenarios.
Q & A
- What is the primary function of the ST25R3916-AQWT?
The ST25R3916-AQWT is a high-performance NFC universal device that supports NFC initiator, NFC target, NFC reader, and NFC card emulation modes.
- What are the supported NFC communication protocols?
The device supports NFC-A / ISO14443A, NFC-B / ISO14443B, NFC-F / FeliCa™, and NFC-V / ISO15693 protocols.
- What is the operating temperature range of the ST25R3916-AQWT?
The operating temperature range is -40°C to +105°C.
- What is the supply voltage range for the ST25R3916-AQWT?
The supply voltage range is 2.4 V to 5.5 V.
- Does the ST25R3916-AQWT support low power modes?
Yes, it supports low power capacitive and inductive card detection, and low power NFC active and passive target modes.
- What communication interfaces are available on the ST25R3916-AQWT?
The device features SPI up to 10 Mbit/s, I2C with up to 400 kbit/s in Fast-mode, 1 Mbit/s in Fast-mode Plus, and 3.4 Mbit/s in High-speed mode, and a 512-byte FIFO.
- Is the ST25R3916-AQWT compliant with EMVCo standards?
Yes, it is fully compliant with EMVCo 3.0 analog and digital standards.
- What is the package style of the ST25R3916-AQWT?
The package style is VFQFPN-32.
- Can the ST25R3916-AQWT drive multiple antennas?
Yes, it can drive two independent single-ended antennas.
- What is the purpose of the automatic antenna tuning (AAT) feature?
The AAT feature adjusts the antenna tuning via a variable capacitor to optimize performance.
- How does the noise suppression receiver (NSR) work?
The NSR allows reception in noisy environments by suppressing noise.
