Specifications

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Wireless Connectivity Guide Texas Instruments 4Q 2014
NFC/RFID
TRF7970A
The TRF7970A is the newest addition to
the TRF796x HF Transceiver IC Family.
TRF7970A supports Near Field
Communication (NFC) Standards
NFCIP-1 (ISO/IEC 18092) and NFCIP-2
(ISO/IEC 21481) which defines the selec-
tion of any of the four possible commu-
nication modes (NFC peer-to-peer, card
emulation, proximity reader/writer – ISO
14443A/B, Mifare or FeliCa and Vicinity
reader/writer – ISO 15693). Integrated
encode, decode and data framing
capability for data rates up to 848bps,
wide supply voltage range support
(2.7V – 5.5V), large FIFO buffer for RF
communication, relevant NFC software
stack libraries and an innovative RF field
detector allow for easy development ef-
forts and robust, cost effective designs.
Finally, eight selectable power modes
and ultra-low power operation enable the
longest battery life in the industry. The
devices also offer unparalleled flexibility
via the various direct communication
modes on the device to allow implemen-
tations of custom protocols as well as
other 13.56-MHz standards. The receiver
system enables AM and PM demodula-
tion using a dual-input architecture to
maximize communication robustness.
Key features
•NFCIP-1,NFCIP-2
•Peer-to-peer,cardemulation,reader/
writer functionality
•ISO14443A,ISO14443B,FeliCa,
ISO 15693
•Supplyvoltagerange:2.7–5.5V
•Operatingtemperature:–40°Cto
+110°C
•ParallelorSPIinterface
•Integrateddataframing,CRCand/or
parity checking
•IntegratedvoltageregulatorsforMCU
supply (20 mA)
•ClockoutputforMCU
•SelectablereceivegainwithAGC
•AntennadriverusingOOKorASK
modulation
•Programmableoutputpower,100mW
and 200 mW
•RFfielddetectorwithprogrammable
wake-up levels
•Eightuser-selectablepowermodes
100 mW and 200 mW
• 7user-selectablepowermodes
13.56-MHz NFC (Near Field Communication)/RFID Transceiver IC
TRF7970A
Get samples, evaluation modules and application notes at: www.ti.com/nfc
Part Number TRF7970A
Operatingfrequency 13.56MHz
OperatingModes
Reader/Writer
ISO/IEC15693,ISO/IEC18000-3
ISO/IEC14443A
ISO/IEC14443B
Peer-to-peer
ISO18092/NFCIP-1
Card Emulation
ISO14443A&B
Operatingvoltage 2.7Vto5.5VDC
Currentconsumption
Transmit:200mWat120mA,typ.
100mWat70mA,typ.
Powerdown:<1μA
Transmitterpower
Adjustablepower,100mWor
200mWat5VDC
Transmittermodulation ASK,adjustable8%to30%OOK
Communicationinterface Parallel8-bitor4-wireSPI
Operatingtemperature –40°Cto+110°C
Storagetemperature –55°Cto+150°C
Package 32-pinQFN,(5mm×5mm)
Packing/delivery Tape-onReel,250or3000perreel
Benefits
•Easytousewithhighflexibility
• Completelyintegratedprotocol
handling
•Auto-configureddefaultmodesfor
each supported ISO protocol
•Separateinternalhigh-PSRRpower
supplies for analog, digital, and PA
sections provide noise isolation for
superior read range and reliability
•DualreceiverinputswithAMandPM
demodulation to minimize
communication holes
•ReceiverAMandPMRSSI
•HighintegrationreducestotalBOM
and board area
•Ultra-low-powermodes
•Powerdown<1µA
•Standby120µA
Applications
Infrastructure devices which
communicate to the NFC enabled smart
phones and PDAs:
•Publictransport/eventticketing
•Accesscontrol/digitaldoor-lock
•POScontactlesspayment
•Medicalequipment
•Productidentification/authentication
•Sharingofelectronicbusinesscards
•Securepairing
Bluetooth, wireless networks
•Shortrangewirelesscommunication
Firmware updates
Development tools and software
• TRF7970AEVM evaluation kit
• TRF7970ATBtargetboardfor
MSP-EXP430F5529boardoranyother
TI embedded microcontroller platform
with the EM socket headers populated
General Characteristics
Supply: 2.7 V - 5.5 V
Crystal
13.56MHz
27.12MHz
Matching
TX_OUT
RX_IN
1
RX_IN
2
V
SS
V
IN
V
DD_X
V
DD_I/0
V
DD_I/0
Serial or
Parallel
XIN
uC/MSP430
TRF7970A
Secure
Element
Optional
ISO7816
or SWP
TRF7970A block diagram.