An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
SLOS743L – AUGUST 2011 – REVISED MARCH 2017
TRF7970A Multiprotocol Fully Integrated 13.56-MHz RFID and Near Field Communication
(NFC) Transceiver IC
1
Device Overview
1
1.1
Features
1
• 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)
1.2
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
1.3
Description
The TRF7970A device is an integrated analog front end (AFE) and multiprotocol data-framing device for a
13.56-MHz
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.
