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TI-TRF7961.pdf
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TI-TRF7961.pdf
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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.
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
1.1 Features
1
• 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.
3 (SPI) or 8 (Parallel)
Impedance
Matching
Circuit
TX_OUT
RX_IN1
RX_IN2
VDD_X
VDD_I/O
SYS_CLK
DATA_CLK
VCC
TRF796x
MSP430 MCU
Crystal
13.56 MHz
IRQ
OSC_IN
OSC_OUT
Copyright © 2017, Texas Instruments Incorporated
2
TRF7960, TRF7961
SLOU186G –AUGUST 2006–REVISED MAY 2017
www.ti.com
Submit Documentation Feedback
Product Folder Links: TRF7960 TRF7961
Device Overview Copyright © 2006–2017, Texas Instruments Incorporated
The TRF7960 and TRF7961 devices support a wide supply voltage range of 2.7 V to 5.5 V and data
communication levels from 1.8 V to 5.5 V for the MCU I/O interface.
The transmitter has selectable output power levels of 100 mW (+20 dBm) or 200 mW (+23 dBm)
equivalent into a 50-Ω load when using a 5-V supply and supports OOK and ASK modulation with
selectable modulation depth.
Built-in programmable auxiliary voltage regulator delivers up to 20 mA to supply an MCU and additional
external circuits within the reader system.
Start evaluating the TRF7960 multiprotocol transceiver IC with the TRF7960AEVM or the TRF7960ATB.
Documentation, Tools, Reference Designs, and Software, Samples
(1) For more information, see Section 9, Mechanical, Packaging, and
Orderable Information.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE
TRF7960RHB VQFN (32) 5 mm × 5 mm
TRF7961RHB VQFN (32) 5 mm × 5 mm
1.4 Typical Application
Figure 1-1 shows a typical application block diagram.
Figure 1-1. Application Block Diagram
3
TRF7960, TRF7961
www.ti.com
SLOU186G –AUGUST 2006–REVISED MAY 2017
Submit Documentation Feedback
Product Folder Links: TRF7960 TRF7961
Table of ContentsCopyright © 2006–2017, Texas Instruments Incorporated
Table of Contents
1 Device Overview ......................................... 1
1.1 Features .............................................. 1
1.2 Applications........................................... 1
1.3 Description............................................ 1
1.4 Typical Application ................................... 2
2 Revision History ......................................... 4
3 Device Comparison ..................................... 5
3.1 Related Products ..................................... 5
4 Terminal Configuration and Functions.............. 6
4.1 Pin Diagram .......................................... 6
4.2 Signal Descriptions ................................... 6
5 Specifications ............................................ 8
5.1 Absolute Maximum Ratings .......................... 8
5.2 ESD Ratings.......................................... 8
5.3 Recommended Operating Conditions ................ 8
5.4 Electrical Characteristics ............................. 8
5.5 Thermal Resistance Characteristics.................. 9
6 Detailed Description ................................... 10
6.1 Overview ............................................ 10
6.2 Power Supplies...................................... 10
6.3 Receiver – Analog Section .......................... 16
6.4 Register Descriptions................................ 22
6.5 Direct Commands From MCU to Reader ........... 31
6.6 Reader Communication Interface ................... 33
6.7 Parallel Interface Communication ................... 34
6.8 Serial Interface Communication..................... 36
7 Applications, Implementation, and Layout........ 41
7.1 Application Schematics ............................. 41
8 Device and Documentation Support ............... 43
8.1 Getting Started and Next Steps..................... 43
8.2 Device Nomenclature ............................... 43
8.3 Tools and Software ................................. 44
8.4 Documentation Support ............................. 44
8.5 Related Links........................................ 45
8.6 Community Resources .............................. 45
8.7 Trademarks.......................................... 45
8.8 Electrostatic Discharge Caution..................... 45
8.9 Export Control Notice ............................... 45
8.10 Glossary............................................. 45
9 Mechanical, Packaging, and Orderable
Information .............................................. 46
4
TRF7960, TRF7961
SLOU186G –AUGUST 2006–REVISED MAY 2017
www.ti.com
Submit Documentation Feedback
Product Folder Links: TRF7960 TRF7961
Revision History Copyright © 2006–2017, Texas Instruments Incorporated
2 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from August 12, 2010 to May 18, 2017 Page
• Removed "and AGC" from "Selectable Receiver Gain" in Section 1.1, Features ........................................... 1
• Updated list of applications.......................................................................................................... 1
• Changed contents of Section 1.3, Description.................................................................................... 1
• Added Device Information table .................................................................................................... 2
• Added Section 1.4, Typical Application ............................................................................................ 2
• Added Section 3, Device Comparison, and moved Table 3-1 to it............................................................. 5
• Added Section 3.1, Related Products ............................................................................................. 5
• Changed the title of Section 4 from Physical Characteristics to Terminal Configuration and Functions.................. 6
• Removed former Section 3.2, Packaging and Ordering Information (see Section 9, Mechanical, Packaging, and
Orderable Information) ............................................................................................................... 7
• Updated note (1) on Section 5.1, Absolute Maximum Ratings, to standard wording........................................ 8
• Moved ESD ratings from Absolute Maximum Ratings to Section 5.2, ESD Ratings; changed ratings from positive
voltages only to positive and negative; added notes for HBM and CDM...................................................... 8
• Changed format of MIN, TYP, and MAX columns in Section 5.4, Electrical Characteristics ............................... 8
• Added the f
D_CLKmax
parameter in Section 5.4, Electrical Characteristics ..................................................... 9
• Changed title of and moved Section 5.5, Thermal Resistance Characteristics .............................................. 9
• Moved contents of Section 6.1, Overview from former Section 2............................................................. 10
• Removed a paragraph that began "The second receiver gain stage and digitizer stage..." in Section 6.3,
Receiver – Analog Section......................................................................................................... 17
• Added the last sentence to the paragraph that begins "The start of the receive operation (successfully received
SOF)..." in Section 6.3.2, Receiver – Digital Section .......................................................................... 18
• Added "and ISO/IEC 15693" to the first sentence of the paragraph that begins "The framing section also
supports bit-collision detection..." in Section 6.3.2, Receiver – Digital Section ............................................. 18
• Changed B2 to Reserved in Table 6-11, Chip Status Control Register (Address = 00h) ................................. 23
• Changed B1 and B0 to Reserved in Table 6-22, RX Special Setting Register (Address = 0Ah) ........................ 28
• Corrected the name of the Reset FIFO command in Table 6-31, Command Codes, and Section 6.5.2, Reset FIFO 31
• Added the last sentence to the paragraph that begins "The serial communications work in the same manner... "
in Section 6.8, Serial Interface Communication ................................................................................. 36
• Removed former section External Power Amplifier Application............................................................... 40
• Added Section 7, Applications, Implementation, and Layout, and moved the application schematics to it ............. 41
• Added Section 8, Device and Documentation Support......................................................................... 43
• Added Section 9, Mechanical, Packaging, and Orderable Information ...................................................... 46
5
TRF7960, TRF7961
www.ti.com
SLOU186G –AUGUST 2006–REVISED MAY 2017
Submit Documentation Feedback
Product Folder Links: TRF7960 TRF7961
Device ComparisonCopyright © 2006–2017, Texas Instruments Incorporated
3 Device Comparison
Table 3-1 summarizes the device characteristics.
Table 3-1. Device Comparison
DEVICE
PROTOCOLS
ISO/IEC 14443 A AND B
ISO/IEC 15693,
ISO/IEC 18000-3
Tag-it™
106 kbps 212 kbps 424 kbps 848 kbps
TRF7960 ✓ ✓ ✓ ✓ ✓ ✓
TRF7961 ✓ ✓
3.1 Related Products
For information about other devices in this family of products or related products, see the following links.
Products for TI Wireless Connectivity Connect more with the broadest wireless connectivity portfolio in
the industry.
Products for NFC / RFID TI provides one of the most differentiated NFC and RFID product portfolios in
the industry and is your solution to meet a broad range of NFC connectivity and RFID
identification needs.
Companion Products for TRF7960 Review products that are frequently purchased or used with this
product.
Reference Designs for TRF7960 The TI Designs Reference Design Library is a robust reference design
library that spans analog, embedded processor, and connectivity. Created by TI experts to
help you jump start your system design, all TI Designs include schematic or block diagrams,
BOMs, and design files to speed your time to market. Search and download designs at
ti.com/tidesigns.
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