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VQFN (RHB) 32 25 mm² 5 x 5 open-in-new Find other Other wireless technologies

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 15693, ISO/IEC 18000-3, ISO/IEC 14443 A and B, and FeliCa™
  • Integrated Encoders, Decoders, and Data Framing for NFC Initiator, Active and Passive Target Operation for All Three Bit Rates (106 kbps, 212 kbps, 424 kbps), and Card Emulation
  • RF Field Detector With Programmable Wake-up Levels for NFC Passive Transponder Emulation Operation
  • RF Field Detector for NFC Physical Collision Avoidance
  • Integrated State Machine for ISO/IEC 14443 A Anticollision (Broken Bytes) Operation (Transponder Emulation or NFC Passive Target)
  • Input Voltage Range: 2.7 VDC to 5.5 VDC
  • Programmable Output Power: +20 dBm (100 mW), +23 dBm (200 mW)
  • Programmable I/O Voltage Levels From 1.8 VDC to 5.5 VDC
  • Programmable System Clock Frequency Output (RF, RF/2, RF/4) from 13.56-MHz or 27.12-MHz Crystal or Oscillator
  • Integrated Voltage Regulator Output for Other System Components (MCU, Peripherals, Indicators), 20 mA (Max)
  • Programmable Modulation Depth
  • Dual Receiver Architecture With RSSI for Elimination of "Read Holes" and Adjacent Reader System or Ambient In-Band Noise Detection
  • Programmable Power Modes for Ultra Low-Power System Design (Power Down <1 µA)
  • Parallel or SPI Interface (With 127-Byte FIFO)
  • Temperature Range: –40°C to 110°C
  • 32-Pin QFN Package (5 mm × 5 mm)

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Description

The TRF7970A device is an integrated analog front end (AFE) and multiprotocol data-framing device for a 13.56-MHz NFC/RFID system supporting all three NFC operation modes – reader/writer, peer-to-peer, and card emulation according to ISO/IEC 14443 A and B, Sony FeliCa, ISO/IEC 15693, NFCIP-1 (ISO/IEC 18092), and NFCIP-2 (ISO/IEC 21481). Built-in programming options make the device suitable for a wide range of applications for NFC, proximity, and vicinity identification systems.

The device is configured by selecting the desired protocol in the control registers. Direct access to all control registers allows fine tuning of various reader parameters as needed.

The TRF7970A device supports data rates up to 848 kbps with all framing and synchronization tasks for the ISO protocols onboard. The TRF7970A device also supports reader and writer mode for NFC Forum tag types 1, 2, 3, 4, and 5. Other standards and even custom protocols can be implemented by using one of the direct modes the device offers. These direct modes let the user fully control the AFE and also gain access to the raw subcarrier data or the unframed, but already ISO-formatted, data and the associated (extracted) clock signal.

The receiver system has a dual-input receiver architecture to maximize communication robustness. The receivers also include various automatic and manual gain control options. The received signal strength from transponders, ambient sources, or internal levels is available in the RSSI register.

A SPI or parallel interface can be used for the communication between the MCU and the TRF7970A device. When the built-in hardware encoders and decoders are used, transmit and receive functions use a 127-byte FIFO register. For direct transmit or receive functions, the encoders or decoders can be bypassed so the MCU can process the data in real time.

The TRF7970A device supports a wide supply voltage range of 2.7 V to 5.5 V and data communication levels from 1.8 V to 5.5 V for the MCU I/O interface.

The transmitter has selectable output power levels of 100 mW (+20 dBm) or 200 mW (+23 dBm) equivalent into a 50-Ω load when using a 5-V supply and supports OOK and ASK modulation with selectable modulation depth.

The built-in programmable auxiliary voltage regulator delivers up to 20 mA to supply an MCU and additional external circuits within the reader system.

Integrated RF field detector with programmable wake-up levels, eight selectable power modes, and ultra-low power operation enable easy development of robust and cost-efficient designs for long battery life.

Start evaluating the TRF7970A multiprotocol transceiver IC with the DLP-7970ABP.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TRF7970A Multiprotocol Fully Integrated 13.56-MHz RFID and Near Field Communication (NFC) Transceiver IC datasheet (Rev. M) Mar. 11, 2020
* Errata TRF7970A Silicon Errata (Rev. B) Dec. 16, 2016
User guide Near Field Communication (NFC) Reader/Writer Reference Design (Rev. A) May 08, 2020
Application note Antenna Design Guide for the TRF79xxA (Rev. C) Mar. 10, 2020
Technical articles Bluetooth® Low Energy shifts gears for car access Jul. 15, 2019
Application note Frequently asked questions for TRF7970A and TRF7964A devices (Rev. B) Mar. 13, 2019
Application note NFC active and passive peer-to-peer communication using the TRF7970A (Rev. B) Mar. 13, 2019
Application note NFC card emulation using the TRF7970A (Rev. B) Mar. 13, 2019
Application note NFC/HF RFID reader/writer using the TRF7970A (Rev. B) Mar. 13, 2019
Technical articles Top 3 design challenges that the new generation of SimpleLink™ Wi-Fi® devices will help you overcome Feb. 21, 2019
Technical articles Exploring the impact of IoT on innovation Jul. 17, 2018
Technical articles An out-of-the-box Internet of Things: building a seamless and secure smart home network Jun. 12, 2018
Application note Build Instructions for neard (Linux NFC) for AM335x + TRF7970A (Rev. B) Jul. 11, 2017
Application note Minimizing TRF7964A and TRF7970A Current Use During Power-Down Mode (Rev. A) Jun. 28, 2017
User guide NFCLink Standalone Getting Started Guide Dec. 22, 2016
Application note TRF7970A Firmware Design Hints (Rev. A) Jun. 29, 2016
Application note TRF7970A NFC Reader Antenna Multiplexing May 09, 2016
Application note TRF79xxA HF-RFID Reader Layout Design Guide (Rev. A) Apr. 18, 2016
Application note Using Special Direct Mode With the TRF7970A Feb. 20, 2015
Application note MIFARE DESFire EV1 AES Authentication With TRF7970A Dec. 30, 2014
Application note TRF7970A + MSP430G2xx NFC/RFID Module Reference Design Aug. 25, 2014
User guide TRF7960ATB, TRF7970ATB NFC/HF RFID Reader Module User's Guide (Rev. A) Jun. 10, 2014
White paper Wireless connectivity for the Internet of Things (IoT) with MSP430 MCUs Mar. 13, 2014
White paper Navigating your way through the RFID jungle Feb. 20, 2014
Application note NFC/RFID Reader Ultra-Low-Power Card Presence Detect With MSP430 and TRF79xxA Mar. 18, 2013
Application note TRF7960 and TRF7970A Comparison Aug. 03, 2011
More literature TRF7970A Near Field Communication Transceiver IC Jun. 16, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

DEVELOPMENT KIT Download
Description

The third party provider DLP Design NFC/RFID BoosterPack (DLP-7970ABP) is an add-on board designed to fit all of TI’s MCU LaunchPads.

This BoosterPack allows the software application developer to get familiar with the functionalities of TRF7970A Multi-Protocol Fully Integrated 13.56 MHz NFC/ HF RFID (...)

Features
  • Compatible with NFCLink Library
  • Compatible with MSP430G2x LaunchPad
  • Compatible with C2000 LaunchPad
  • Compatible with TIVA C Series LaunchPad
  • Compatible with Hercules LaunchPad
  • 13.56MHz HF RFID Reader/Writer
  • Supports ISO 15693, 18000-3, 14443A/B, and FeliCa
  • RFID/NFC Reader, NFC Peer, or in Card Emulation (...)

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Linux NFC (neard) for TRF7970A
LINUX-NFC-TRF7970A This application report describes the process required to correctly build and test Linux NFC (neard) on AM335x (Cortex-A8) based BeagleBone + BeagleBone RF Cape + TRF7970ATB connected platform, using the Texas Instruments Sitara Software Development Kit (SDK) v3.03 and associated TI SDK file system (...)
Features

 

  • Direct connection from Linux MPU to NFC transceiver (TRF7970A)
  • Enables lowest BOM cost for full NFC system solution available today using neard
  • Reader/Writer Mode (Types 2, 3, 4A, 4B and 5)

 

CODE EXAMPLE OR DEMO Download
SLOC297C.ZIP (148 KB)

Reference designs

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VQFN (RHB) 32 View options

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