TRF7960_17 Datasheet, PDF (1/54 Pages) Texas Instruments – Multiple-Standard Fully Integrated 13.56-MHz RFID Analog Front End and Data-Framing Reader System

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TRF7960, TRF7961
SLOU186G – AUGUST 2006 – REVISED MAY 2017
TRF7960, TRF7961 Multiple-Standard Fully Integrated 13.56-MHz RFID
Analog Front End and Data-Framing Reader System
1 Device Overview
1.1 Features
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• Completely Integrated Protocol Handling
• 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
• Reader-to-Reader Anticollision
• High Integration Reduces Total BOM and Board
Area
– Single External 13.56-MHz Crystal Oscillator
– MCU-Selectable Clock-Frequency Output of RF,
RF/2, or RF/4
– Adjustable 20-mA High-PSRR LDO for
Powering External MCU
• Easy to Use With High Flexibility
– Automatically Configured Default Modes for
Each Supported ISO Protocol
– 12 User-Programmable Registers
– Selectable Receiver Gain
– Programmable Output Power (100 mW or
200 mW)
– Adjustable ASK Modulation Range (8% to 30%)
– Built-In Receiver Band-Pass Filter With User-
Selectable Corner Frequencies
• Wide Operating Voltage Range of 2.7 V to 5.5 V
• Ultra-Low-Power Modes
– Power Down: <1 µA
– Standby: 120 µA
– Active (RX Only): 10 mA
• Parallel 8-Bit or Serial 4-Pin Serial Peripheral
Interface (SPI) With MCU Using 12-Byte FIFO
• Ultra-Small 32-Pin QFN Package (5 mm × 5 mm)
• Available Tools (Also See Tools and Software)
– Reference Design and EVM With Development
Software
– Source Code Available for MSP430™ MCU
1.2 Applications
• Secure Access Control
• Product Authentication
• Medical Systems
• Public Transport or Event Ticketing
1.3 Description
The TRF7960 and TRF7961 devices are integrated analog front end and data-framing systems for a
13.56-MHz RFID reader system that supports multiple protocols including ISO/IEC 14443 A and B,
FeliCa™, and ISO/IEC 15693. Built-in programming options make it suitable for a wide range of
applications for proximity and vicinity identification systems.
The reader 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 device supports data rates up to 848 kbps with all framing and synchronization tasks for the ISO
protocols onboard. Other standards and even custom protocols can be implemented by using one of the
direct modes that the device offers. These direct modes let the application 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 TRF796x reader.
When the built-in hardware encoders and decoders are used, transmit and receive functions use a 12-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.
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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.