Overview
The TRF7970A, produced by Texas Instruments, is a multiprotocol fully integrated 13.56-MHz RFID and Near Field Communication (NFC) transceiver IC. This device is designed to support all three NFC operation modes: reader/writer, peer-to-peer, and card emulation. It complies with various standards including ISO/IEC 14443 A and B, Sony FeliCa, ISO/IEC 15693, NFCIP-1 (ISO/IEC 18092), and NFCIP-2 (ISO/IEC 21481). The TRF7970A integrates an analog front end (AFE) and multiprotocol data-framing capabilities, making it suitable for a wide range of NFC, proximity, and vicinity identification systems.
Key Specifications
| Parameter | Description |
|---|---|
| Operating Frequency | 13.56 MHz |
| Supply Voltage Range | 2.7 VDC to 5.5 VDC |
| Output Power | +20 dBm (100 mW), +23 dBm (200 mW) |
| I/O Voltage Levels | 1.8 VDC to 5.5 VDC |
| Data Rates | Up to 848 kbps |
| Interface | Parallel or SPI (with 127-byte FIFO) |
| Temperature Range | –40°C to 110°C |
| Package | 32-Pin QFN (5 mm × 5 mm) |
| Power Consumption | Stand-by: <1 µA, Active: up to 150 mA (depending on mode) |
Key Features
- Supports Near Field Communication (NFC) Standards NFCIP-1 (ISO/IEC 18092) and NFCIP-2 (ISO/IEC 21481)
- Completely Integrated Protocol Handling for ISO/IEC 14443 A and B, Sony FeliCa, ISO/IEC 15693
- Integrated Encoders, Decoders, and Data Framing for NFC Initiator, Active and Passive Target Operation
- RF Field Detector With Programmable Wake-up Levels for NFC Passive Transponder Emulation Operation
- Dual Receiver Architecture With RSSI for Elimination of 'Read Holes' and Adjacent Reader System or Ambient In-Band Noise Detection
- Programmable Modulation Depth and Power Modes for Ultra Low-Power System Design
- Integrated Voltage Regulator Output for Other System Components (MCU, Peripherals, Indicators)
- Supports Reader and Writer Mode for NFC Forum Tag Types 1, 2, 3, 4, and 5
Applications
- Mobile Devices (Tablets, Handsets)
- Secure Pairing (Bluetooth®, Wi-Fi®, Other Paired Wireless Networks)
- Public Transport or Event Ticketing
- Passport or Payment (POS) Reader Systems
- Short-Range Wireless Communication Tasks (Firmware Updates)
- Product Identification or Authentication
- Medical Equipment or Consumables
- Access Control, Digital Door Locks
- Sharing of Electronic Business Cards
Q & A
- What is the operating frequency of the TRF7970A?
The operating frequency of the TRF7970A is 13.56 MHz.
- What are the supported NFC standards by the TRF7970A?
The TRF7970A supports NFCIP-1 (ISO/IEC 18092) and NFCIP-2 (ISO/IEC 21481) standards.
- What are the output power levels of the TRF7970A?
The output power levels are +20 dBm (100 mW) and +23 dBm (200 mW).
- What interfaces does the TRF7970A support?
The TRF7970A supports parallel or SPI interfaces with a 127-byte FIFO.
- What is the temperature range of the TRF7970A?
The temperature range is –40°C to 110°C.
- What is the package type of the TRF7970A?
The package type is a 32-Pin QFN (5 mm × 5 mm).
- What are some of the key applications of the TRF7970A?
Key applications include mobile devices, secure pairing, public transport or event ticketing, and medical equipment.
- Does the TRF7970A support custom protocols?
- What is the power consumption of the TRF7970A in stand-by mode?
The power consumption in stand-by mode is less than 1 µA.
- Does the TRF7970A have an integrated voltage regulator?
