TOKEN TR4308I Chip RFID Transponder Coils RFID Transponder Coils Transponder Coils (TR4308I) is The Key of Radio Frequency Identification (RFID) System Preview Token TR4308I transponder coil series is specified for RFID applications for the best performing designed at 125 kHz. The TR4308I covers a wide range of electrical performances and offers better sensitivity, greater read distance and higher SRF than other coils its size. The TR4308I’s length and cross section area are optimized for best sensitivity in the coil axis. The coil is wound on a plastic base, providing great durability and allowing this part to withstand harsh mechanical shock. With operating temperature range to 125°C, these coils are ideal for a wide range of applications. Radio Frequency Identification (RFID) is the system of using radio signals to send information identifying a particular situation or item. Token TR4308I is suited for wireless data transmission in low frequency RFID products, such as immobilizers, TPMS, keyless entry. Other industrial applications include access control and tracking devices. In addition to our standard models, Token can design transponder coils to operate at other frequencies. Customized inductance values are available on request. Features : - High Q value. - Low profile with an extended length. Applications : - Car remote control key. Version 2010 http://www.token.com.tw/ rfq token.com.tw 01 of 04 TOKEN TR4308I Chip RFID Transponder Coils Configurations & Dimensions B F C G TC-XXX A H Top View Type TC4308I E A 11.43 D B 3.15 C 2.74 Land Pattern D 1.01 E 0.51 F 2.79 G 1.78 H 8.46 Note: Design as Customer’s Requested Specifications. Electrical Characteristics Part Number TC4308I - 401J TC4308I - 901J TC4308I - 112J TC4308I - 202J TC4308I - 242J TC4308I - 332J TC4308I - 412J TC4308I - 492J TC4308I - 682J TC4308I - 712J TC4308I - 812J Inductance (mH) 0.40 0.90 1.08 1.97 2.38 3.30 4.15 4.90 6.80 7.10 8.10 Q (min) 15 15 15 17 17 17 17 17 17 17 17 Test Freq. (KHz) 125 125 125 125 125 125 125 125 125 125 125 SRF (KHz)(min) DCR (Ω)(max) 4500 4000 4000 2400 2200 1800 1700 1300 1000 1000 960 7.4 22 25 34 39 51 74 96 112 115 123 Note: Test Freq.: 125KHz / 0.25V. Operating Temp.: -40°C+85°C. 02 of 04 http://www.token.com.tw/ rfq token.com.tw Version 2010 TOKEN TR4308I Chip RFID Transponder Coils Transponder Coils Applications Transponder Coils in an RFID Radio Frequency Identification System RFID, Radio Frequency Identification, is the system of using radio signals to send information identifying a particular item. The most common application of RFID is to track and locate any subject including material, or moving item. The RFID transponder coil is part of the coupling device and acts as the transmitting antenna. The main specifications of the transponder coil are sensitivity and read distance, however, the inductance of the transponder coil directly influences the sensitivity and the read distance. Generally, a higher inductance provides greater sensitivity resulting in a longer read distance. There are two major components in an RFID system: ● Tag: The transponder programmed with unique information. The tag consists of an integrated circuit and a coupling device. The integrated circuit stores specific data unique to that tag. ● Reader: The interrogator includes a decoder to interpret data. The coupling device interfaces with the reader. The manufacturer of the tag usually specifies the inductance of the coil to be used. The read distance is defined as the maximum distance from the reader that the transponder responds to the reader’s magnetic field. The reader produces a magnetic field that triggers the tag. When the reader receives the transmitted data, it interprets the data and takes appropriate action as shown in figure 1. When the transponder enters the field produced by the reader, the coil produces a voltage inside the tag. In an active transponder, the voltage is used to wake the tag and use its internal battery. In a passive transponder, this voltage can be used to power the tag. Active transponders generally have longer read distances, shorter operational life and are larger and more costly to manufacture. Passive transponders are generally smaller, have a longer life and are less expensive to manufacture. For optimum performance, the transponder coil is used in a parallel LC circuit as shown in figure 2. Adding a capacitor to the circuit maximizes the read distance. The LC circuit is designed to resonate at the operating frequency of the reader. To calculate the value of the capacitor, use the following equation: Capacitance (C) = 1 / (Inductance L x (2π x Frequency ƒ))2 Magmetic field produced by the reader Tag Reader Figure 2. LC Circuit Data transmitted by the tag Figure 1. RFID System Version 2010 http://www.token.com.tw/ rfq token.com.tw 03 of 04 TOKEN TR4308I Chip RFID Transponder Coils How to Order TR4308I 401 J Part Number: TR4308I Tolerance Code Tolerance 401 901 112 0.40µH 0.90µH 1.08µH Design code Code J Tolerance 5% Back to 1st Page - RFID Transponder Coils (TR4308I) 04 of 04 http://www.token.com.tw/ rfq token.com.tw Version 2010