DEMO MANUAL DC2617A LTC6820 isospi/isolated CAN Arduino Shield DESCRIPTION

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1 DESCRIPTION Demonstration circuit A implements the isospi and isolated CAN interface hardware on a single Arduino shield. It allows Arduino-compatible controller boards to communicate with isospi and/or CAN bus networks. DCA is compatible with both V or.v logic controller boards. DCA derives its power directly from the Arduino controller board via the.v output. isospi is a robust -wire isolated interface popularized by Analog Device s family of high voltage battery stack monitors. DCA includes the LTC 0 and associated transformers to translate between the Arduino s SPI port and the RJ isospi connector. DEMO MANUAL DCA LTC0 isospi/isolated CAN Arduino Shield CAN bus is a robust standards-based communications method used in automotive and industrial settings. DCA includes the LTM9 isolated CAN transceiver to connect to a CAN bus on the standard 9-pin sub-d connector. An onboard controller (MCP) provides the logic interface between the Arduino s SPI and CAN. Alternatively, DCA can be connected directly to controller boards which include CAN functionality. Design files for this circuit board are available at All registered trademarks and trademarks are the property of their respective owners. dcafa

2 DEMO MANUAL DCA QUICK START PROCEDURE (Throughout this document, any controller board with Arduino-Uno compatible sockets will be referred to simply as Arduino. An example of this can be the DC0C Linduino One). Plug the DCA into the Arduino.. Provide power to the Arduino. This will also powerup the DCA through the.v power pin of the sockets. (Do not apply power to the turret labeled V CC.V to V). Connect J isospi to the isospi network using a RJ cable. (Alternatively, isospi can be accessed using the test points labeled isoip and isoim). Connect J CAN to the CAN bus using a DB9 cable. (Alternatively, CAN may be accessed using pins labeled CH and CL. It is also possible to connect a USB CAN dongle directly to J by removing the DB9 gender changer that is plugged into J.) Table lists the connections that the shield pins establish between the Arduino and the DCA. Table LOGIC SIGNAL ARDUINO LABEL DCA SCHEMATIC COMMENTS J Pin SPI Serial Clock to MCP and LTC0 SO J Pin SPI Serial Data Out from MCP and LTC0 SI J Pin SPI Serial Data in to MCP and LTC0 CS_0 0 J Pin SPI Chip Select for LTC0 CS_ 9 J Pin SPI Chip Select for MCP IOREF IOREF J Pin Logic Supply Level for SPI V V J Pin.V Supply from Arduino to LTM9 INT J Pin Connects to INT of MCP SCL/CAN_RX SCL J Pin 0 Connects to LTM9 CAN RXD if JP set to Nuc SDA/CAN_TX SDA J Pin 9 Connects to LTM9 CAN TXD if JP set to Nuc Table. Connections dcafa

3 DEMO MANUAL DCA JUMPER SETTINGS Use the following jumper settings to further configure the DCA: JUMPER JP Set JP to ARD Set JP to NUC FUNCTION Establish SPI communication between Arduino and MCP. In this setting, MCP handles the logic communication between SPI and CAN. LTM9 is the physical layer CAN transceiver. Establish communication directly from pins CAN_RX/CAN_TX (J) to LTM9. This can be useful in some controller boards such as Nucleo, which have built-in CAN functionality which comes out on these pins. LTM9 is the physical layer CAN transceiver. JUMPER JP Set JP to ON Set JP to OFF FUNCTION Termination to LTM9 is turned on. See LTM9 data sheet for details. Termination of LTM9 is turned off. See LTM9 data sheet for details. CAN BUS POWER LTM 9 includes a built-in isolated power supply that provides an isolated power output (V) on the same ground domain as the isolated CAN bus. This output can be accessed using pins V/G on connector J. See LTM9 data sheet for details. dcafa

4 DEMO MANUAL DCA PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C, C Capacitor, Tantalum, 0µF A 0V AVX, TAJA0M00RNJ C Capacitor, µf 0% 00 0V XR Murata, LLL9RA0MA0L C Capacitor Feedthru.µF 0% 0V 00 Murata, NFMPCBAD 0 C Optional, Capacitor, XY, 0pF 0% 0VAC Vishay/VYKYSQV0 C, C Capacitor, 0.µF, XR, V, 0%, 00, Automotive Murata, GCMRE0KAD C, C9 Capacitor, 0.0µF, XR, V, 0%, 00 Murata, GRMRE0KA0D E, E, E Testpoint, Turret, 0.0" Mill-Max, J 9 Position D-Sub Receptacle, Female Sockets Connector Assmann, A-DF 09 A/KG-TS 9 J Conn. Header. 0POS 0.00" Adam Tech., RS-0-G-.-A9 0 J, J Conn. Header. POS 0.00" Adam Tech., RS-0-G-.-A9 J Conn. Header. POS 0.00" Adam Tech., RS-0-G-.-A9 J Connector RJ, CACE Code 009 Tyco, 09- J Conn Header POS, 0." Samtec, TSW-0-0-L-S J Gender Changer, D-Sub9, Metal Housing, M/M, with Hex Screws Assmann, AK I JP, JP Header, 0.", x Pin Wurth Elektronik 00 JP, JP Connector Shunt, 0.", POS (x) Samtec, MNT-0-BK-G R Resistor, 0k % 00 /0W Vishay, CRCW000K0FKEA R0, R Resistor, 0.Ω, /0W, % 00 Vishay, CRCW000RFKEA 9 R, R Resistor, 9Ω, /0W, % 00 Vishay, CRCW009RFKEA 0 R, R, R, R, R0 Resistor, 0Ω % 00 Vishay, CRCW000000Z0EA 0 R Resistor, 00, DNP 0 R9 Resistor, DNP R Resistor,.k % 00 /0W Vishay, CRCW00KFKEA R Resistor, k % 00 /0W Vishay, CRCW00K0FKEA R, R Resistor, 0.Ω % 00 /W Vishay, CRCW000RFKEA R, R Resistor, k, /0W, % 00 Vishay, CRCW00K00FKEA R, R9 Resistor, k, /0W, % 00 Vishay, CRCW00K00FKEA T CHOKE, Common Mode Choke Coil for Automotive, 00µH, Murata, DLWSH0XKL 0%/+0% (at MHz) 9 0 T CHOKE, Trans, DNP 0 T Transformer, Pulse, Hi Isolation Sumida, CEEH9B U CAN controller Microchip, MCP-E/ST U Isolated CAN Transceiver w/isolated Power,.V Linear Tech., LTM9HY-#PBF U isospi Isolated Communications Interface Linear Tech., LTC0HMS#PBF Y Resonator.0MHz Ceramic Murata, CSTCEM0V-R0 dcafa

5 DEMO MANUAL DCA SCHEMATIC DIAGRAM REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE - PRODUCTION PW 0-0- V U V G CH CL R9 C 00 FEEDTHRU 0 Vss RXBF J DNP U LTM9-9 R k R.k isocan.uf OSC RX0BF C uf D INT D INT OSC 00 A L B PVCC Vcc L TXRTS PVCC Vcc C A L CAN Y VCC ADJ 0uF B NC Mhz VCC NC RS L R0 0 A VL L SI TXRTS A SI ON R A CANH L SO 9 TX0RTS S L SO 0k A SPLIT TXD L CS_ A CANL J CS CLKOUT/SOF RXD K JP ON CONN DSUB 9-R A K 9 RESET RXCAN RE K TERMINATION 0 IOREF VDD TXCAN DNC K JP MCP C R CTRL SWAP R OFF 0.uF MCP C 0p SDA/CAN_TX SCL/CAN_RX OPT E CM NUCLEO TOP COPPER TOP COPPER C C C 0uF K K K K B B B B B B INNER LAYER ~0 SCL~ J J 9 0 INT SO SI CS_0 CS_ SCL/CAN_RX SDA/CAN_TX IP SI MOSI VCMP B J B MISO J SO POWER ANALOG IN SLOW CS_0 CS MSTR R VCCS IP 0 isospi POL IM 0 T R0 R PHA VCC 9 CEEH9B 0. 9 R 0 RJ T T C 0nF R C 0.uF DNP J R 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. isoip V TP TP V IOREF R9 K R K R K R K V/V U LTC0 IBIAS EN R 9 C9 0nF R SUMIDA DNP R 0. 0 DLWSH0XK IOREF TP 0 McCarthy Blvd. CUSTOMER NOTICE IM TP APPROVALS Milpitas, CA 90 A E E LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (0) A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (0)-00 isoim HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL NC LTC Confidential-For Customer Use Only.V - V APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. TITLE: CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PW SCHEMATIC VCC PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. ISO SPI AND ISOLATED CAN ARDUINO BOARD SIZE IC NO. REV. LTC0, LTM9 N/A DEMO CIRCUIT A DATE: 0-0- SHEET OF THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE dcafa

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