Texas Instruments TRF7961RHBT, TRF7961, TRF7960, TRF7960RHBT Datasheet

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SLOS504B – AUGUST 2006 – REVISED APRIL 2007

Multi-Standard Fully Integrated 13.56-MHz Radio Frequency Identification (RFID) Analog

Front End and Data Framing Reader System

TRF7960/61

FEATURES

• Ultralow-Power Modes

• Completely Integrated Protocol Handling – Power Down < 1 µ A

(OSI Model Layer 3 and Below)

• Separate Internal High-PSRR Power Supplies

for Analog, Digital, and PA Sections Provides Noise Isolation for Superior Read Range and Reliability

• Dual Receiver Input With AM and PM

Demodulation to Minimize Communication Holes (Patent Pending).

• Receiver AM and PM RSSI

• Reader-to-Reader Anti-Collision

• High Integration Reduces Total BOM and

Board Area – Single External 13.56-MHz Cystal Oscillator – MCU-Selectable Clock-Fequency Output of

RF, RF/2, or RF/4

– Adjustable 20-mA, High-PSRR LDO for

Powering External MCU

– Standby 120 µ A – Active (Rx only) 10 mA

• Parallel 8-Bit or Serial 4-Pin SPI Interface With

MCU Using 12-Byte FIFO

• Ultrasmall 32-Pin QFN Package (5 mm ×

5 mm)

• Available tools

– Reference Design/EVM With Development

Software

– Source Code Available for MSP430

APPLICATIONS

• Secure Access Control

• Product Authentication

– Printer Ink Cartridges – Blood Gucose Monitors

• Contactless Payment Systems

• Easy to Use With High Flexibility

– Auto-Configured Default Modes for Each

Spported ISO Protocol – 11 User-Programmable Registers – Selectable Receiver Gain and AGC – Programmable Output Power

(100 mW or 200 mW) – Adjustable ASK Modulation Range

(8% to 30%) – Built-In Receiver Band-Pass Filter With

DESCRIPTION

The TRF7960/61 is an integrated analog front end and data framing system for a 13.56-MHz RFID reader system. Built-in programming options make it suitable for a wide range of applications both in proximity and vicinity RFID 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.

User-Selectable Corner Frequencies

• Wide Operating Voltage Range of 2.7 V to

5.5 V

DEVICE ISO14443A/B

106 kbps 212 kbps 424 kbps 848 kbps

TRF7960 X X X X X X TRF7961 X X

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Tag-it is a trademark of Texas Instruments Incorporated.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Table 1. PRODUCT SELECTION TABLE

PROTOCOLS

ISO15693

ISO18000-3

Tag-it™

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Tx_Out

Rx1_AM

Rx2_PM

VDD_X

VDD_I/O

SYS_CLK

DATA_CLK

8 (Parallel)

3(SPI)

VDD

TRF7960

MSP430

Z-Matching

Circuit

Xtal

13.56MHz

IRQ

VDD_A

VDD_RF

VDD_PA

TX_OUT

VSS_PA

VSS_RX

RX_IN1

I/O_7

I/O_6

I/O_5

I/O_4

I/O_3

I/O_2

I/O_1

I/O_0

VIN

ThermalPad

TRF796x

RHB-32

OSC_IN

OSC_OUT

MOD

IRQ

ASK/OOK

VSS_A

RX_IN2

VSS

BAND_GAP

VDD_I/O

VDD_X

VSS_D

SYS_CLK

TA_CLK

EN2

TRF7960/61

SLOS504B – AUGUST 2006 – REVISED APRIL 2007

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

DESCRIPTION (CONTINUED)

Figure 1. Typical Application

A parallel or serial interface can be used for The receiver system also includes a framing system. communication between the MCU and reader. When This system performs the CRC and/or parity check, hardware encoders and decoders are used removes the EOF and SOF settings, and organizes (accelerators for different standards), transmission the data in bytes. Framed data is then accessible to and receive functions use a 12-byte FIFO register. the MCU via a 12-byte FIFO register and MCU For direct transmit or receive functions, the interface. The framing supports ISO14443 and encoders/decoders can be bypassed in order for the ISO15693 protocols. MCU to process the data in real time. The transmitter has selectable output-power levels of 100 mW (20 dBm) or 200 mW (23 dBm) into a 50- Ω load (at 5 -V supply) and is capable of ASK or OOK modulation. Integrated voltage regulators ensure power-supply noise rejection for the complete reader system.

The TRF7960/61 supports data communication levels between 1.8 V–5.5 V for the MCU I/O interface while also providing a data synchronization clock. An auxiliary 20-mA regulator (pin 32) is available for additional system circuits.

Data transmission comprises low-level encoding for ISO15693, modified Miller for ISO14443-A, high-bit-rate systems, Tag-it, and HF-EPC system coding. Included with the data encoding is automatic generation of SOF, EOF, CRC, and/or parity bits.

The receiver system enables AM and PM demodulation using a dual-input architecture. The receiver also includes an automatic gain control

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Figure 2. TRF796x Pin Assignments (Top View)

option and selectable gain. Also included is a selectable bandwidth to cover a broad range of input subcarrier signal options. The received signal strength for AM and PM modulation is accessible via the RSSI register. The receiver output is selectable between a digitized subcarrier signal and any of eleven integrated subcarrier decoders (two for ISO15693 low bit rate, two for ISO15693 high bit rate, two for ISO14443, three for ISO14443 high bit rates, one for Tag-it, and one for HF-EPC system). Selected decoders also deliver bit stream and a data clock as outputs.

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TRF7960/61

SLOS504B – AUGUST 2006 – REVISED APRIL 2007

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

VIN Supply voltage 6 V I

stg

(1) The absolute maximum ratings under any condition is limited by the constraints of the silicon process. Stresses above these ratings may

(2) The maximum junction temperature for continuous operation is limited by package constraints. Operation above this temperature may

Output current 150 mA Continuous power dissipation See Dissipation Rating Table Maximum junction temperature, any condition

(2)

Maximum junction temperature, continuous operation, long-term reliability Storage temperature range –55 to 150 ° C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 300 ° C

HBM (human body model) 2 kV

ESDS rating CDM (charged device model) 500

MM (machine model) 200

cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only and functional operation of the device at these or any other conditions beyond those specified are not implied.

result in reduced reliability and/or lifetime of the device.

(1)

VALUE UNIT

140 ° C

(2)

125 ° C

TABLE 5. PACKAGING/ORDERING INFORMATION

(1)

PACKAGED DEVICES PACKAGE TYPE TRANSPORT MEDIA QUANTITY

TRF7960RHBT Tape and reel 250 TRF7960RHBR Tape and reel 3000 TRF7961RHBT Tape and reel 250 TRF7961RHBR Tape and reel 3000

RHB-32

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

Web site at www.ti.com .

DISSIPATION RATINGS TABLE PER PACKAGE

PACKAGE

( ° C/W) ( ° C/W)

(1)

TA≤ 25 ° C TA= 85 ° C

POWER RATING

RHB (32) 31 36.4 2.7 W 1.1 W

(1) This data was taken using the JEDEC standard high-K test PCB. (2) Power rating is determined with a junction temperature of 125 ° C. This is the point where distortion starts to increase substantially.

Thermal management of the final PCB should strive to keep the junction temperature at or below 125 ° C for best performance and long-term reliability.

(2)

RECOMMENDED OPERATING CONDITIONS

over operating free-air temperature range (unless otherwise noted)

MIN TYP MAX UNIT

VIN Supply voltage 2.7 5 5.5 V T

Operating virtual junction temperature range –40 125 ° C Operating ambient temperature range –40 25 110 ° C Load impedance at TX OUT (pin 5) 10 Ω

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