MAX149X2EVKIT#

Evaluates: MAX14940/MAX14943/ MAX14946/MAX14949 MAX149X2 Evaluation Kit General Description The MAX149X2 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the functionality of the MAX14943 isolated RS-485/PROFIBUS transceiver. The EV kit operates from a single 3.3V supply and features an on-board isolated power supply to power the secondaryside of the circuit. The MAX149X2 EV kit comes with the MAX14943GWE+ installed, but can also be used to evaluate the pin-compatible MAX14940, MAX14946, and MAX14949 ICs. Features ●● Operates from a Single 3.3V Supply ●● Terminal Block Connectors for Easy RS-485/ PROFIBUS Evaluation ●● 5000VRMS Isolation for 60s ●● Fully Assembled and Tested ●● Proven PCB Layout Ordering Information appears at end of data sheet. Quick Start Required Equipment ●● ●● ●● ●● MAX149X2 EV kit 3.3V, 1A DC power supply Signal/function generator Oscilloscope Startup Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Set the DC power supply to 3.3V and connect the DC power supply between the EV kits VDDA and GNDA connectors of the EV kit. 2) Ensure that J2 and J3 are in their default positions (see Table 1). 3) Turn on the power supply. 4) Set the signal/function generator to output a 100kHz 0 to 3V square wave. Note: Set the signal/function generator to operate with a high-impedance load. If needed, the R1 pad is available to add a 50Ω impedance to ground. 5) Connect the signal/function generator to the TXD test point. 6) Verify that the A and B outputs switch as the signal toggles. Table 1. Jumper Settings (J1–J6) JUMPER J1 J2 J3 J4 *Default position. 19-7646; Rev 0; 6/15 SHUNT POSITION DESCRIPTION 1-2 Receiver is disabled. RXD is high impedance. 2-3* Receiver is enabled. RXD is active. 1-2* Driver is enabled. DEM is high. 2-3 Driver is disabled. DEM is low. Open* DE and RE are not connected together. Closed DE and RE are connected together. Open* A and B are not connected through the on-board 120Ω resistor. Closed Connects the on-board 120Ω resistor between A and B. Evaluates: MAX14940/MAX14943/ MAX14946/MAX14949 MAX149X2 Evaluation Kit Detailed Description of Hardware The MAX149X2 EV kit is a fully assembled and tested circuit board for evaluating the MAX14943 isolated RS-485/ Profibus transceiver (U1). The EV kit has been designed to allow for evaluating the IC alone or in a standard RS-485 configuration. The EV kit is powered from a single 3.3V power supply. External Power Supply The power on the EV kit is derived from a single 3.3V source. Connect an external supply from GNDA to either the VDDA test point or P1 connector to supply the 3.3V to the logic side (A) of the circuit. The integrated push-pull transformer driver and external transformer (TX1) generate an isolated supply for powering the (B) isolated side of the board. Evaluating the Isolated RS-485 Interface Driver and Receiver Enable Selection The EV kit features three jumpers (J1, J2, and J3) to enable/disable the driver and receiver outputs. Set J1 to 2-3 to enable the receiver. Set J2 to 1-2 to enable the driver. To actively control both enables, remove J1 and J2 and close J3, which connects DE and RE together. Resistors R2 – R4 Configuration For end-of-the-line transceivers, close J4 to connect a 120Ω resistor (R3) between the A and B RS-485 I/Os on the IC. Pullup and pulldown resistors are generally used on the receiver inputs to guarantee a known state in the event that all nodes on the bus are in receive mode, or the cable becomes disconnected. The exact value for these resistors varies with the application. Pads are provided for pullup (R2) and pulldown (R4) resistors for the A-B lines, although the use of these resistors is purely optional. Note that the MAX14943 features true fail-safe receiver inputs that ensure RXD is high when the receiver inputs are shorted, open, or connected to an idle bus. Selecting a Transformer Table 2 is a list of transformers designed to operate with the device family. Select the transformer that best meets the performance requirements of the end application. All transformers in Table 2 can be used on the EV kit. Table 2. Transformer Selection MANUFACTURER/PART NUMBER TURNS RATIO ISOLATION VOLTAGE (VRMS) A-SIDE SUPPLY (V) CAN BE USED WITH MAXIM PART NUMBERS HALO TGMS-1440V6LF 1CT: 1.33CT 2750 5V MAX14940, MAX14946 HALO TGMS-1464V6LF 1CT:2.4CT 2750 3.3V MAX14940, MAX14946 HALO TGMR-1440V6LF 1CT:1.33CT 5000 5V MAX14943, MAX14949 HALO TGMR-1464V6LF 1CT:2.4CT 5000 3.3V MAX14943, MAX14949 WURTH 750315226 1CT:1.3CT 2750 5V MAX14940, MAX14946 WURTH 750315228 1CT: 2CT 2750 3.3V MAX14940, MAX14946 WURTH 750315230 1CT:1.3CT 5000 5V MAX14943, MAX14949 WURTH 750315232 1CT: 2CT 5000 3.3V MAX14943, MAX14949 www.maximintegrated.com Maxim Integrated │  2 MAX149X2 Evaluation Kit Component List, PCB Layout, and Schematic See the following links for component information, PCB layout diagrams, and schematics: ●● MAX149X2 EV BOM Evaluates: MAX14940/MAX14943/ MAX14946/MAX14949 Ordering Information PART TYPE MAX149X2EVKIT# EV Kit #Denotes RoHS compliant. ●● MAX149X2 EV PCB Layout ●● MAX149X2 EV Schematic www.maximintegrated.com Maxim Integrated │  3 MAX149X2 Evaluation Kit Evaluates: MAX14940/MAX14943/ MAX14946/MAX14949 Revision History REVISION NUMBER REVISION DATE 0 6/15 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2015 Maxim Integrated Products, Inc. │  4 8 7 6 5 4 3 1 2 VLDO TX1 TGMR-1464V6LF 1 1 6 6 D VDDA C3 10UF VDDA 2 2 5 5 3 3 4 4 D1 VDDB C5 10UF D2 VDDA T1 P1 VLDO C4 0.1UF U1 MAX14943GWE+ RXD T4 C VDDA C1 0.1UF C2 1UF VDDA 1 2 3 4 5 6 IN IN IN IN RE T5 RXD RE DE TXD 1 J1 IN 2 J3 3 P2 RXD RE IN DE IN 2 1 TD2 VLDO TD1 VDDB 11 16 4 VDDA A 12 5 6 RXD RE B 13 7 DE DEM 10 8 TXD GNDB 14 9 15 GNDA GNDB C7 0.1UF C8 1UF TXD IN T11 DEM IN DEM T12 B C A J4 IN B IN DEM R3 120 VDDB P3 1 2 3 4 5 6 R4 OPEN B IN 1 J2 B T10 R1 OPEN 2 3 DE T6 A IN VDDB B VDDA VDDB T9 R2 OPEN IN GNDB 3 C6 1UF D A VDDB 1 2 VLDO T8 TXD T7 T2 GNDA T13 GNDB T3 T14 A A PROJECT TITLE: MAX149X2 EVKIT DRAWING TITLE: SIZE DATE: HARDWARE NUMBER: B _ ENGINEER: 04/08/2015 DRAWN BY: REV: TEMPLATE REV: 1.5 8 7 6 5 4 3 2 A SHEET 2 OF 2 1 This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX149X2_EVKIT_A HARDWARE NUMBER: ODB++/GERBER: P1 DATE: 04/08/2015 VDDA GNDA T1 SILK_TOP VLDO VDDB GNDB T2 T8 T9 T13 TX1 GNDA VDDA D1 P2 P3 T4 C3 RXD VDDB R4 D2 T5 RE J3 B J4 R3 U1 T11 T6 A R2 C8 C7 DE T10 DEM R1 TXD C1 C2 T7 C4 C6 T12 GNDB GNDA MAX149X2 EVKIT GNDA H DE RE L J1 1" GNDB 888-MAXIM-IC www.maximintegrated.com H GNDA GNDB L J2 T3 T14 REV-A 04/15 EA This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX149X2_EVKIT_A HARDWARE NUMBER: DATE: 04/08/2015 1" ODB++/GERBER: TOP This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX149X2_EVKIT_A HARDWARE NUMBER: DATE: 04/08/2015 1" ODB++/GERBER: INTERNAL2 This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX149X2_EVKIT_A HARDWARE NUMBER: DATE: 04/08/2015 1" ODB++/GERBER: INTERNAL3 This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX149X2_EVKIT_A HARDWARE NUMBER: DATE: 04/08/2015 1" ODB++/GERBER: BOTTOM This document contains information considered proprietary, and shall not be reproduced wholly or in part, nor disclosed to others without specific written permission. HARDWARE NAME:MAX149X2_EVKIT_A HARDWARE NUMBER: DATE: 04/08/2015 ODB++/GERBER: C5 1" SILK_BOT TITLE: Bill of Materials DATE: 04/08/2015 DESIGN: max149x2_evkit_a ITEM QTY REF DES 1 2 3 2 C1, C7 MFG PART # C0603C104K4RAC; GCM188R71C104KA37; C1608X7R1C104K; GRM188R71C104K; C0603X7R160-104KNE GRM188R71E105KA12D; 3 C2, C6, C8 CGA3E1X7R1E105K GRM21BR61E106K; C2012X5R1E106K125AB; 2 C3, C5 C2012X5R1E106K MANUFACTURER MURATA 1UF MURATA/TDK 10UF KEMET/MURATA/T DK 0.1UF CAPACITOR; SMT; 0603; CERAMIC; 0.1uF; 25V; 10%; X7R; -55degC to + 125degC; +/-15% from 55degC to +125degC; NOT RECOMMENDED FOR NEW DESIGN USE - 20-000u1-01 KEMET/MURATA/T DK/VENKEL LTD. 0.1UF 4 1 C4 5 2 D1, D2 MBR0520 GENERIC PART 6 2 J1, J2 PEC03SAAN SULLINS 7 2 J3, J4 PEC02SAAN SULLINS 8 1 P1 1935161 PHOENIX CONTACT 9 2 P2, P3 1935200 PHOENIX CONTACT 1 R3 CRCW0603120RJN 11 2 SU1, SU2 STC02SYAN 12 3 T1, T8, T9 13 T2, T3, 4 T13, T14 14 T4-T7, 7 T10-T12 15 1 TX1 TGMR-1464V6LF DESCRIPTION CAPACITOR; SMT (0603); CERAMIC CHIP; 0.1UF; 16V; TOL=10%; TG=-55 DEGC TO +125 DEGC; TC=X7R; NOT RECOMMENDED FOR NEW DESIGN USE 20-000u1-01 CAPACITOR; SMT (0603); CERAMIC CHIP; 1UF; 25V; TOL=10%; MODEL=GRM SERIES; TG=-55 DEGC TO +125 DEGC; TC=X7R CAPACITOR; SMT (0805); CERAMIC CHIP; 10UF; 25V; TOL=10%; MODEL=; TG=-55 DEGC TO +125 DEGC; TC=X5R C0603C104K3RAC; GRM188R71E104KA01; C1608X7R1E104K 10 VALUE DIODE; SCH; SCHOTTKY RECTIFIER; SMT (SOD123); PIV=20V; IF=0.5A; -55 DEGC TO +150 DEGC CONNECTOR; MALE; THROUGH HOLE; PEC03SAAN BREAKAWAY; STRAIGHT; 3PINS CONNECTOR; MALE; THROUGH HOLE; PEC02SAAN BREAKAWAY; STRAIGHT; 2PINS MBR0520 CONNECTOR; FEMALE; THROUGH HOLE; GREEN 1935161 TERMINAL BLOCK; STRAIGHT; 2PINS CONNECTOR; FEMALE; THROUGH HOLE; GREEN 1935200 TERMINAL BLOCK; STRAIGHT; 6PINS RESISTOR; 0603; 120 OHM; 5%; 200PPM; 0.10W; VISHAY DALE 120 THICK FILM TEST POINT; JUMPER; STR; TOTAL SULLINS LENGTH=0.256IN; BLACK; INSULATION=PBT CONTACT=PHOSPHOR BRONZE; COPPER PLATED ELECTRONICS CORP. STC02SYAN TIN OVERALL TESTPOINT WITH 1.80MM HOLE DIA, RED, 5010 ? 5010 MULTIPURPOSE TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN; BLACK; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; RECOMMENDED FOR BOARD 5011 ? 5011 THICKNESS=0.062IN TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH=0.445IN; BOARD HOLE=0.063IN; YELLOW; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; RECOMMENDED FOR BOARD 5014 ? 5014 THICKNESS=0.062IN HALO TGMRTRANSFORMER; SMT; 1:2.4; POWER ELECTRONICS, INC 1464V6LF TRANSFORMER; DRAFT DATASHEET ONLY 16 1 U1 MAX14943GWE+ MAXIM EVKIT PART-IC; PACKAGE CODE: W16M-9; OUTLINE DRAWING NO.: 21-0042; LAND MAX14943G PATTERN DRAWING NO.: 90-0107; WSOIC16 WE+ 300MIL 17 1 MAX149x2 MAXIM PCB PCB: MAX149x2 TOTAL 37 MFG PART # MANUFACTURER VALUE DESCRIPTION N/A OPEN PACKAGE OUTLINE 0603 RESISTOR - EVKIT DO NOT PURCHASE(DNP) ITEM QTY REF DES 1 TOTAL 3 R1, R2, R4 N/A 3