DEMO MANUAL DC2507A LTC2986 and LTC Input Protected Universal Temperature Measurement System on a Chip. Description

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1 Description Demonstration circuit DC507A is a resistive protection network designed to interface the LTC 986 demonstration boards (DC508 for LTC986 or DC68 for LTC986-). The LTC986 is a pin and software compatible 0-channel version of the 0-channel LTC98. The LTC986 includes several new modes enabling external protection/ filtering resistors for -/-/-wire RTDs, thermistors, and thermocouples. The DC507A includes a universal input -input terminal block, front end protection/filtering resistors, and a interface for connecting to the DC508/DC68 demonstration circuit. The -input terminal block (J) can directly interface to a single -/-/-wire RTD, or a thermistor, or a thermocouple (with options for cold junction compensation). A single hardware design is shared between all sensor types. Switching between sensors simply requires a change in software (channel assignment programming). All LTC986 DEMO MANUAL DC507A LTC986 and LTC986- Input Protected Universal Temperature Measurement System on a Chip input channels are isolated from the terminal block by a.kω, W protection resistor, while the complementing DC508 contains 00pF filtering capacitors. As a reference, the DC507A includes a top level hookup diagram for each sensor type, see Figure. The DC507A requires a DC5 or DC608 kit. These kits contain the LTC986 motherboard (DC508 or DC68) and a Linduino One (DC06) USB interface board. Additionally, QuikEval software is used to program the LTC986 channel assignment data and display the temperature results. Design files for this circuit board are available at L, LT, LTC, LTM, Linear Technology, the Linear logo and Linduino are registered trademarks and QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. UNIVERSAL SENSOR INPUT -WIRE RTD -WIRE RTD -WIRE RTD THERMISTOR THERMOCOUPLE TO DC508 OR DC68 AND DC06 DC507A F0 Figure. DC507A Demonstration Board dc507af

2 DEMO MANUAL DC507A Setup Global Parameters Setup In order to run the LTC986 in the universally protected mode, all kelvin mode global variables need to be set, see Figure. Note, these variables are not available with the LTC98 and LTC98. The LTC986 will automatically determine the current mode based on the sensor type and/or the number of sensor wires. Figure. Setting Global Kelvin Mode dc507af

3 DEMO MANUAL DC507A Setup Sense Resistor Setup The DC508 includes a precision kω sense resistor. This Sense resistor is assigned to CH for all RTDs and Thermistors (see Figure ). Built-In Configurations The LTC986 demonstration software includes stored configurations for each of the sensor type used for the DC507A demonstration board. These can be loaded by selecting the menu function: Configuration > Demo Board > DC507A. (see Figure ). These configurations will automatically load all the channel assignment data and global variables for each sensor. Figure. Sense Resistor Channel Assignment Figure. Loading Pre-Programmed Sensor Configurations dc507af

4 DEMO MANUAL DC507A Setup -Wire RTD Connect the -wire RTD to between terminals and on terminal block J, see Figure 5. J The -wire RTD is assigned to CH (see Figure 6) and can be automatically loaded using the configuration file DC507A_MULTI_SENSOR_BOARD WIRE_RTD or manually entered using the LTC986 demonstration software. DC507A F05 Figure 5. -Wire RTD Connection Figure 6. -Wire RTD Configuration dc507af

5 DEMO MANUAL DC507A Setup -Wire RTD Connect the -wire RTD to between terminals, and on terminal block J, see Figure 7. J The -wire RTD is assigned to CH6 (see Figure 8) and can be automatically loaded using the configuration file DC507A_MULTI_SENSOR_BOARD WIRE_RTD or manually entered using the LTC986 demonstration software. DC507A F07 Figure 7. -Wire RTD Connection Figure 8. -Wire RTD Configuration dc507af 5

6 DEMO MANUAL DC507A Setup -Wire RTD Connect the -wire RTD to between terminals,, and on terminal block J, see Figure 9. J The -wire RTD is assigned to CH6 (see Figure 0) and can be automatically loaded using the configuration file DC507A_MULTI_SENSOR_BOARD WIRE_RTD or manually entered using the LTC986 demonstration software. In the universal protected mode, -wire RTDs have rotation and sharing turned off, the DC507 includes a protected ground connection for the -wire RTD. DC507A F09 Figure 9. -Wire RTD Connection Figure 0. -Wire RTD Configuration 6 dc507af

7 DEMO MANUAL DC507A Setup Thermistor Connect the thermistor between terminals and on terminal block J, see Figure. J The thermistor is assigned to CH (see Figure ) and can be automatically loaded using the configuration file DC507A_MULTI_SENSOR_BOARD_0K_THERMISTOR or manually entered using the LTC986 demonstration software. DC507A F Figure. Thermistor Connection Figure. Thermistor Configuration dc507af 7

8 DEMO MANUAL DC507A Setup Thermocouple Connect the thermocouple between terminals and on terminal block J, see Figure. of sensors can be used for the cold junction compensation. U R J Q CJ DC507A F CJ Option : Active analog temperature sensor (U) tied to CH0. CJ Option : Diode (Q) tied to CH9. CJ Option : -wire RTD connected between terminals and on terminal block J and assigned to CH. CJ Option : Thermistor connected between terminals and on terminal block J and assigned to CH. See pages 6-65 in the LTC986 data sheet for more information. The thermocouple is assigned to CH6 (see Figure ) and can be automatically loaded using the configuration file DC507A_MULTI_SENSOR_BOARD_ THERMICOUPLE_0K_THERMISTOR_CJ or DC507A_ MULTI_SENSOR_BOARD_THERMICOUPLE_PT00 _CJ or manually entered using the LTC986 demonstration software. Figure. Thermocouple and Cold Junction Connection Figure. Thermocouple and Cold Junction Configuration 8 dc507af

9 DEMO MANUAL DC507A PCB Layout Top Silkscreen dc507af 9

10 DEMO MANUAL DC507A PCB Layout Top Layer 0 dc507af

11 DEMO MANUAL DC507A PCB Layout Bottom Layer dc507af

12 DEMO MANUAL DC507A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER C, C CAP., 0.µF, X7R, 6V, 0%, 060 AVX 060YC0KATA J CONN., TERMINAL BLOCK, POS, 5.08mm, THT,.5A, PHOENIX 8697 GREEN J CONN., RCPT., 0 POS.,.7mm, R/A, THT HIROSE FX-0S-.7DS(7) LB LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY THT MP-MP STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE 88 6 PCB PCB, DC507A MAO BANG 600-DC507A 7 Q XSTR., NPN, 0V, 00mA, TO-9 L, THT FAIRCHILD SEMI N90TF 8 R RES., kω, 0.%, /8W, THT VISHAY PTF56K0000BYEB 9 8 R-R9 RES.,.kΩ, %, W, AXIAL LEADED VISHAY CMF0K000GNEK 0 R0-R RES.,.99kΩ, %, /0W, 060 NIC NRC06F99TRF R RES., kω, 5%, /0W, 060 VISHAY CRCW060K00JNEA U IC, REMOTE INTERNAL TEMP SENSOR, 6-PIN DFN LINEAR TECHNOLOGY LTC997IDCB#TRMPBF mm mm U IC, MEMORY, EEPROM, K-BIT, 00kHz, TSSOP-8 MICROCHIP LC05-I/ST dc507af

13 DEMO MANUAL DC507A Schematic Diagram 5 EEVCC U LTC997-DCB EEVCC NOT STUFFED D D D+ D- R0.99k R.99k VCC VPTAT VREF 6 R k U LC05-I/ST SCL 6 SDA 5 WP 7 A A A0 R.99k 5 7 GND GND R k /8W 0.% D B COM C R CH0 C A C D B CH9.k W % CH8 C A CH D B CH7 CH6 C A EESDA R D B CH5 CH C A EESCL.k W % D5 B5 CH CH CH C5 A5 D6 B6 CH J R5 CH0 C6 A6 TERMINAL BLOCK D7 B7 CH9 Q.k W % CH8 C7 A7 N90 CH5 D8 B8 CH7 CH6 C8 A8 R6 D9 B9 CH5 CH C9 A9.k W % D0 B0 CH C0 A0 B B EEVCC GND EEPROM ARRAY VCC 8 C 0.uF CH0 C 0.uF R.k W % R7.k W % CH CH CH6 CH D J C B A RCPT. HIROSE FX-0S-.7DS(7) CH A A 5 PCA ADDITIONAL PARTS MP STANDOFF,NYLON, SNAP-ON, 0.50" MP STANDOFF,NYLON, SNAP-ON, 0.50" MP STANDOFF,NYLON, SNAP-ON, 0.50" MP STANDOFF,NYLON, SNAP-ON, 0.50" LB LABEL SPEC, DEMO BOARD SERIAL NUMBER PCB PCB, DC507AREV0 R8.k W % R9.k W % CH7 CH8 NOTES:. R-R9 ARE AXIAL LEAD THRU-HOLE TYPE.. R0-R, C-C ARE SMD SIZE 060. <Core Design> 60 McCarthy Blvd. APPROVALS Milpitas, CA 9505 PCB DES. M.HAWKINS Phone: (08) Fax: (08)-0507 APP ENG. M. MAYES LTC Confidential-For Customer Use Only IC NO. TITLE: DEMO CIRCUIT SCHEMATIC, LTC986 LTC986 PROTECTED MULTI-SENSOR DEMO BOARD SIZE: SKU NO. PCA BOM: 700-DC507A_REV0 SCHEMATIC NO. AND REVISION: DC507A PCA ASS'Y: 705-DC507A_REV0 70-DC507A_REV0 LTR SCALE = NONE DATE: Friday, June 7, 06 SHEET OF Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. dc507af

14 DEMO MANUAL DC507A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 0 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 60 McCarthy Blvd. Milpitas, CA 9505 Copyright 00, Linear Technology Corporation LT 06 PRINTED IN USA Linear Technology Corporation 60 McCarthy Blvd., Milpitas, CA (08) -900 FAX: (08) LINEAR TECHNOLOGY CORPORATION 06 dc507af