Overview
The TRF7970ARHBR is a multi-protocol fully integrated 13.56-MHz NFC/RFID transceiver IC produced by Texas Instruments. This device is designed to support all three NFC operation modes: reader/writer, peer-to-peer, and card emulation. It complies with various NFC and RFID 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 is an integrated analog front end (AFE) and multiprotocol data-framing device, making it suitable for a wide range of applications in NFC, proximity, and vicinity identification systems.
Key Specifications
| Specification | Value |
|---|---|
| Package | VQFN (RHB) with 32 pins |
| Operating Temperature Range | -40°C to 110°C |
| 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 | 1.8 VDC to 5.5 VDC |
| System Clock Frequency Output | RF, RF/2, RF/4 from 13.56-MHz or 27.12-MHz Crystal or Oscillator |
| Auxiliary Voltage Regulator Output | Up to 20 mA |
| Interface | SPI or Parallel with 127-byte FIFO |
| Modulation | OOK and ASK with selectable modulation depth |
| Power Modes | Eight selectable power modes, ultra-low power operation (<1 µA in power down) |
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 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
- Integrated State Machine for ISO/IEC 14443 A Anticollision (Broken Bytes) Operation (Transponder Emulation or NFC Passive Target)
- Dual Receiver Architecture With RSSI for Elimination of 'Read Holes' and Adjacent Reader System or Ambient In-Band Noise Detection
- Programmable Modulation Depth and Output Power
- Ultra Low-Power System Design with Eight Selectable Power Modes
Applications
- Access Control, Digital Door Locks
- Sharing of Electronic Business Cards
- Product Identification or Authentication
- Medical Equipment or Consumables
- Short-Range Wireless Communication Tasks (Firmware Updates)
- NFC, Proximity, and Vicinity Identification Systems
Q & A
- What is the operating temperature range of the TRF7970ARHBR?
The operating temperature range is -40°C to 110°C.
- What NFC standards does the TRF7970ARHBR support?
The device supports NFCIP-1 (ISO/IEC 18092) and NFCIP-2 (ISO/IEC 21481).
- What are the programmable output power levels of the TRF7970ARHBR?
The device has programmable output power levels of +20 dBm (100 mW) and +23 dBm (200 mW).
- What interfaces does the TRF7970ARHBR support for communication with the MCU?
The device supports SPI or parallel interfaces with a 127-byte FIFO register.
- What modulation types does the TRF7970ARHBR support?
The device supports OOK and ASK modulation with selectable modulation depth.
- What is the power consumption in power down mode?
The device consumes less than 1 µA in power down mode.
- What is the input voltage range of the TRF7970ARHBR?
The input voltage range is 2.7 VDC to 5.5 VDC.
- Does the TRF7970ARHBR support custom protocols?
Yes, the device supports custom protocols through direct modes that allow full control over the AFE.
- What is the maximum data rate supported by the TRF7970ARHBR?
The device supports data rates up to 848 kbps.
- What is the purpose of the integrated RF field detector?
The integrated RF field detector is used for NFC passive transponder emulation operation and physical collision avoidance.
