EVB90121 MLX90121 Evaluation Board Features and Benefits Output power up to 200miliwatts Complies with standard ISO15693 and ISO 14443 protocols Programmable encoder for custom protocol Short to medium reading range applications Matching network optimized for 50 ohm antenna impedance 10 pins connector for communication with a microcontroller Board voltage supplied by a jack connector from 6 to 9 Volts DC Internal power supply of the board between 3 Volts and 5 Volts DC Ordering Information Part No. EVB90121 Applications Examples Evaluation Board EVB90121 Freight identification systems Smart labels and write systems Access control systems General Description The EVB90121 is an assembled module that allows to evaluate the advantages of the MLX90121 13MHz transceiver IC and to facilitate the development of RFID applications. The board voltage is supplied by a jack connector from 6 to 9 Volts DC. The internal power supply of the board can be chosen between 3 Volts and 5 Volts DC by putting the corresponding jumper up or down. A suppression choke reduces the supply noise. The matching network can be adjusted through CV1 capacitor and thus can be optimized to transmit full electromagnetic power up to 200mWatt to a 50-ohm load antenna connected on a SMA connector. All digital inputs/outputs from the MLX90121 are connected to a standard 10 pins connector. This allows easy connection to a microcontroller. 390129012101 Rev. 002 Page 1 of 8 Evaluation Board Jan/07 EVB90121 MLX90121 Evaluation Board Table of Contents 1 SCHEMATIC..................................................................................................................... 3 2 PHYSICAL OUTLINE ....................................................................................................... 4 3 COMPONENTS ................................................................................................................ 5 4 GUIDELINES .................................................................................................................... 6 4.1 POWER SUPPLY .......................................................................................................................... 6 4.2 ANTENNA CONNECTION ............................................................................................................... 6 4.3 CONNECTION TO A MICROCONTROLLER ....................................................................................... 6 4.4 DIGITAL CONNECTOR .................................................................................................................. 7 4.5 ANALOGUE OUTPUTS .................................................................................................................. 7 5 DISCLAIMER.................................................................................................................... 8 390129012101 Rev. 002 Page 2 of 8 Evaluation Board Jan/07 + VCC 10uF/Tantale C6 JACK Page 3 of 8 JP1 100nF C8 C10 22pF Gnd 1 TP3 Antenna 3 2 1 2 1 C11 22pF 47pF C4 33pF 5.6uH CV1 5-50pF Clk TP8 3 IN R4 10R C5 10nF 10 9 8 7 6 5 4 3 2 1 U3 OUT RTB NC XBUF VSS2 XIN XOUT VSS1 MOD TX VDD1 U2 XC6201 ( SOT89 ) C1 10uF/tantale L3 3 4.7uH C7 OUT L2 13.56MHZ Y1 1 Ant L4 1.2uH IN TP2 2 U1 XC62FP ( SOT-89 ) GND 1 J1 1 GND 390129012101 Rev. 002 2 1 RX R9 DOUT VDD2 DIN MODE CK DSYNC VDD3 NC VSS3 MLX 90121 C2 10uF/tantale 1K 11 12 13 14 15 16 17 18 19 20 D1 R1 7K5 R8 1K R7 1K R6 1K R5 1K R10 1K 3 2 1 J3 C12 VCC 100nF TP4 1 VCC Supply JUMPER TEST ANA R3 4k7 D2 R2 4K7 3 VOLTS 5 VOLTS C3 VCC 100nF C9 Gnd 1 TP6 10uF/tantale VK200 L1 1 TP1 Vdd JP2 9 7 5 3 1 M icrocontroller 10 8 6 4 2 GND CK MODE DIN DOUT RTB DSYNC J2 T est points DIGIT AL 1 2 3 4 5 6 7 EVB90121 MLX90121 Evaluation Board 1 Schematic The schematic if the MLX90121 evaluation board is shown in figure 1. Figure 1: Schematic of the evaluation board EVB90121 Evaluation Board Jan/07 EVB90121 MLX90121 Evaluation Board 2 Physical outline Figures 2 and 3 show the outline of the MLX90121 evaluation board. Figure 2: MLX90121 evaluation board outline: top side Figure 3: MLX90121 evaluation board outline: bottom side 390129012101 Rev. 002 Page 4 of 8 Evaluation Board Jan/07 EVB90121 MLX90121 Evaluation Board 3 Components The table below gives an overview of all components that composed the evaluation board EVB90121. Reference R1 R2 R3 R4 R5,R6,R7,R8,R9, CV1 C1,C2,C3,C6 C4 C5 C7 C8,C9,C12 C10,C11 D1,D2 JP1 JP2 J1 J2 L1 L2 L3 L4 U1 U2 U3 Y1 Value 7,5 kΩ 4,7 kΩ 4,7 kΩ 10 Ω 1 kΩ 5-50 pF 10uF 33 pF 10 nF 47 pF 100 nF 22 pF SMA connector DIL10 connector Jack connector Debug connector VK200 4,7 μH 5,6 μH 1,2 μH XC62FP XC6201 MLX90121 Crystal Description Tuned capacitor used to adjust the matching network to 50-ohm Decoupling capacitors, Tantalum type Red LEDs Connection to a 50 ohms antenna Connection to a microcontroller Power supply connection Noise suppressor choke Through hole RF chokes type B78108S from EPCOS Through hole RF chokes type B78108S from EPCOS Through hole RF chokes type B78108S from EPCOS +5Volts regulator, package SOT23 +3Volts regulator, package SOT23 MLX90121CA device, package SSO20 Crystal oscillator Table 1: Components 390129012101 Rev. 002 Page 5 of 8 Evaluation Board Jan/07 EVB90121 MLX90121 Evaluation Board 4 Guidelines This chapter describes all connections and jumpers available on the EVB90121 circuit to be able to use it in the most efficient way. 4.1 Power supply • The circuit can be supplied with a standard DC supply block (transformer or switch mode power supplies) connected to the jack connector J1. The input supply can be selected from 6 to maximum 9 volts DC to avoid permanent damage of the evaluation board. • The internal power supply of the board can be selected between 3 Volts and 5 Volts DC by changing the position of the jumper J3. 4.2 Antenna connection • The SMA screw connector JP1 allows the connection of a 50-ohm antenna. The matching network is adjusted with CV1 capacitor on a prefect 50-ohm load. This will give maximum power up to 250mWatt to the connected antenna. 4.3 Connection to a microcontroller • All digital Inputs/Outputs of the MLX90121 device are available on the JP2 connector. This allows easy connection to a microcontroller. Following table is the description of JP2 connector. Pin number (connector JP2) 1 2 3 4 5 6 7 8 9 10 Name DOUT DIN RTB MODE CK DSYNC GND - Description Data Output Not connected Data Input Reception or Transmission selection Input Configuration or Communication selection Input Serial Clock Input Synchronization Output Not connected Ground Not connected Table 2: Connector JP2 390129012101 Rev. 002 Page 6 of 8 Evaluation Board Jan/07 EVB90121 MLX90121 Evaluation Board 4.4 Digital connector • All digital Inputs/Outputs of MLX90121 device are also available on the connector J2 and can be used to connect digital probes of an oscilloscope. Pin number 1 2 3 4 5 6 7 Name GND CK MODE DIN DOUT RTB DSYNC Description Ground Serial Clock Input Configuration or Communication selection Input Data Input Data Output Reception or Transmission selection Input Synchronization Output Table 3: Connector J2 4.5 Analogue outputs • Some analogue outputs are foreseen on the evaluation board as test pins referenced from TP1 to TP8. These test pins can be used to measure analogue information. The following table describes all test pins available on the evaluation board. Test pins number TP1 TP2 TP3,TP6 TP8 Name VDD Ant GND CLK Description Supply Voltage Antenna Ground Output XBUF of MLX90121 device Table 4: Test pins 390129012101 Rev. 002 Page 7 of 8 Evaluation Board Jan/07 EVB90121 MLX90121 Evaluation Board 5 Disclaimer 1) The information included in this documentation is subject to Melexis intellectual and other property rights. Reproduction of information is permissible only if the information will not be altered and is accompanied by all associated conditions, limitations and notices. 2) Any use of the documentation without the prior written consent of Melexis other than the one set forth in clause 1 is an unfair and deceptive business practice. Melexis is not responsible or liable for such altered documentation. 3) The information furnished by Melexis in this documentation is provided ’as is’. Except as expressly warranted in any other applicable license agreement, Melexis disclaims all warranties either express, implied, statutory or otherwise including but not limited to the merchantability, fitness for a particular purpose, title and non-infringement with regard to the content of this documentation. 4) Notwithstanding the fact that Melexis endeavors to take care of the concept and content of this documentation, it may include technical or factual inaccuracies or typographical errors. Melexis disclaims any responsibility in connection herewith. 5) Melexis reserves the right to change the documentation, the specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. 6) Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the information in this documentation. 7) The product described in this documentation is intended for use in normal commercial applications. Applications requiring operation beyond ranges specified in this documentation, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. 8) Any supply of products by Melexis will be governed by the Melexis Terms of Sale, published on www.melexis.com. © Melexis NV. All rights reserved. For the latest version of this document, go to our website at: www.melexis.com Or for additional information contact Melexis Direct: Europe, Asia: Americas: Asia: Phone: +32 1367 0495 Phone: +1 603 223 2362 Phone: +32 1367 0495 E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] ISO/TS 16949 and ISO14001 Certified 390129012101 Rev. 002 Page 8 of 8 Evaluation Board Jan/07