Near Field Communication – Part 2

Near Field Communication – Part 2




• Industrial: NFC-enabled access, M2M communication

• Medical: Product identification, authorization consumables

• Smart-meter: Pre-payment, device configuration

• Automotive: Communication interface to smartphone

• Consumer electronics: Pairing via NFC, peripherals, toys

• Retail: POS contactless payment


TRF796xA / TRF7970A – 13.56MHz NFC / RFID transceiver ICs


Detailed Description

  The  and TRF7970A are high-performance 13.56MHz analog front end (AFE) ICs with integrated data-framing system for ISO/IEC 15693, ISO/IEC 18000-3, ISO/IEC 14443A and B. The TRF7970A supports Near Field Communication (NFC) standards NFCIP-1 (ISO/IEC 18092) and NFCIP-2 (ISO/IEC 21481) which define the selection of any of the three possible communication modes (NFC peer-to-peer, card emulation, proximity reader/writer – ISO 14443A/B or FeliCa and Vicinity reader/writer – ISO 15693).

  Integrated encode, decode and data framing capability for data rates up to 848 kbits, wide supply voltage range support (2.7 V – 5.5 V), large FIFO buffer for RF communication, relevant NFC software stack libraries and an innovative RF field detector allow for easy development efforts and robust, cost-effective designs.

  The devices also offer unparalleled flexibility via the various direct communication modes on the device to allow implementations of custom protocols as well as other 13.56MHz standards. The receiver system enables AM and PM demodulation using a dual-input architecture to maximize communication robustness. Finally, eight selectable power modes and ultra-low-power operation enable the longest battery life in the industry. 


Block Diagram of TRF79xxA TRF79xxa-Block-Diagram-Hardware-Pro


Key Features

• ISO 14443A, ISO 14443B, ISO 15693, ISO/IEC 18000-3 (Mode 1)

• Supply voltage range: 2.7 – 5.5 V

• Parallel data communication or serial 4-pin SPI interface

• Integrated data framing, CRC and/or parity checking

• Multiple sub-carrier receiving and decoding compatibility

• Data rates supported up to 848 kHz

• 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

• Seven user-selectable power modes



Key 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


Near Field Communication (NFC) Training Series

1.1 Near Field Communication (NFC) Training Series Part 1: Near Field Communication Introduction 03:48
1.2 Near Field Communication (NFC) Training Series Part 2: NFC Technology Brief 04:32
1.3 Near Field Communication (NFC) Training Series Part 3: NFC Applications 08:05
1.4 Near Field Communication (NFC) Training Series Part 4: NFC Portfolio 12:06
1.5 Near Field Communication (NFC) Training Series Part 5: NFC Markets and TI Offering 06:13

Source: TI



Amazon Gift Ideas  Affiliate Link

Amazon Hot New Releases  Affiliate Link

Amazon Best Sellers  Affiliate Link


Leave a Reply