DEMO MANUAL DC2296 DC2209 and DC2210 LTC2983 Digital Temperature Measurement System Description The DC2296 is the starter kit for demonstrating the performance and ease of use of the LTC®2983, which is a complete temperature measurement system on a chip. This kit includes the DC2209 (main demo circuit containing the LTC2983) and the DC2210 (a simple experiment circuit allowing bread boarding). In addition to the starter demonstration kit, sensor specific demonstration boards highlighting the performance of RTDs, thermistors, or thermocouples are also available. • Universal Temperature Measurement Board – DC2211 • Thermocouple Board – DC2212 • Dedicated RTD Board – DC2213 • Dedicated Thermistor Board – DC2214 The DC2209 is a member of the QuikEval™ family of demonstration boards. It is designed to allow easy evaluation of the LTC2983 and may be connected to any one of the sensor daughter boards. These daughter boards allow evaluation of the various LTC2983 sensor types (see Figure 1). For the serial digital interface, the DC2209 may be connected to the DC2026 Linduino™ One. Design files for this circuit board are available at http://www.linear.com/demo/DC2296 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and QuikEval and Linduino are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Figure 1. DC2209 Temperature Measurement Demonstration Board dc2296fa 1 DEMO MANUAL DC2296 Quick Start Procedure Connect one of the five sensor daughter boards (DC2210, DC2211, DC2212, DC2213 or DC2214) to the DC2209 demo board. Connect the DC2209 to a DC2026 using the supplied 14-conductor ribbon cable. Connect the DC2026 to the PC using a standard USB A/B cable. Run the QuikEval software which the latest version can be downloaded from the Linear website at www.linear.com/ software. The LTC2983 demo program will be loaded automatically. Refer to software manual LTC2983DSM for more detailed information. The demo software helps program and run the LTC2983. It can configure the LTC2983, check and save the configuration, run the LTC2983, output the results into a file, and even create Linduino One ready C code based on the configuration. The demo software allows the user to configure the LTC2983 manually or automatically from data stored in the daughter board EEPROM. Please see www.linear.com/LTC2983software for the demo software manual. It includes a short tutorial for getting started. Figure 2 shows a screenshot of the demo software at start-up. Figure 2. LTC2983 Demo Software 2 dc2296fa DEMO MANUAL DC2296 Hardware Setup DC2210 Experimenter Board (included in DC2296 Kit) The DC2210 experimenter board (see Figure 3) brings all 20 channels plus the COM connection out to a proto area and a 24-position terminal block. The user may connect any of the supported sensors and sense resistors to any of the LTC2983 inputs in this area. Figure 4 shows the connection schematic of the DC2210 Experimenter board. Figure 3. DC2210 Experimenter Board dc2296fa 3 DEMO MANUAL DC2296 Hardware Setup J2 J1 J3 Figure 4. DC2210 Experimenter Board Schematic 4 dc2296fa DEMO MANUAL DC2296 Hardware Setup DC2211 Universal Temperature Measurement Board The universal temperature measurement board (see Figure 5) allows the user to connect any of the LTC2983 supported sensors to the DC2209 demo board. Figure 5. DC2211 Universal Temperature Measurement Board dc2296fa 5 DEMO MANUAL DC2296 Hardware Setup The universal temperature measurement board has a built-in sense resistor for RTD applications as well as a cold junction sensor diode for thermocouple applications (see Figure 6 for the DC2211 schematic diagram). The sense resistor is a 2kΩ ±0.1% 10ppm/°C sense resistor on channels 1 and 2 which may be used with any of the supported RTD sensor types. The precise value of this sense resistor is stored in an on-board EEPROM. The LTC2983 demo software can read this EEPROM and use to configure the sense resistor value in the LTC2983’s configuration memory. The external interface on the universal temperature measurement board is an 8-position screw-terminal block with the flowing pinout. Table 1. DC2211 Terminal Connector Pinout Position A LTC2983 CH2 as well as the low side of the on-board 2k sense resistor Position B LTC2983 CH3 Position C LTC2983 CH4 Position D LTC2983 CH5 Position E Common/Ground Connection Position F Common/Ground Connection Position G Common/Ground Connection Position H Common/Ground Connection J1 R6 J2 R5, 100Ω R4, 100Ω R3, 100Ω R2, 100Ω R1, 100Ω Q1 Figure 6. DC2211 Universal Temperature Measurement Board Schematic 6 dc2296fa DEMO MANUAL DC2296 Hardware Setup Universal Temperature Measurement Daughter Board Examples • Four thermocouples connected to positions A-D with the negative connections tied to positions E-H using the on-board diode as cold junction sensor (see Figure 7a for the schematic and Figure 8a for the corresponding software configuration). • A 4-wire RTD connected to positions A-D using the on-board sense resistor as the ratiometric reference (see Figure 7b for the schematic and Figure 8b for the corresponding software configuration). Figure 7. Universal Temperature Measurement Board Examples dc2296fa 7 DEMO MANUAL DC2296 Hardware Setup Figure 8a. DC2211 Four Thermocouple Software Configuration 8 dc2296fa DEMO MANUAL DC2296 Hardware Setup Figure 8b. DC2211 4-Wire RTD Software Configuration dc2296fa 9 DEMO MANUAL DC2296 Hardware Setup DC2212 Thermocouple Daughter Board The thermocouple board (see Figure 9) demonstrates the flexibility, accuracy, and low noise features of the LTC2983 thermocouple modes. If the user wishes to connect external sensors to the thermocouple board, two universal-type thermocouple jacks (J2 and J3) are provided (see schematic diagram Figure 10 and corresponding software configuration Figure 11). The user may connect any of the LTC2983 supported thermocouples (B, E, J, K, N, R, S, or T) as well as custom thermocouples through these jacks. To demonstrate the flexibility of the LTC2983, the thermocouple board includes cold junction diodes (Q1 and Q2) embedded in each thermocouple socket. Alternatively, a 4-wire PT100 RTD (R5) can be used as the cold junction sensor for either or both thermocouples. To demonstrate the low system noise and offset of the LTC2983, the thermocouple board provides a short to ground on channel 5. To demonstrate the accuracy of the LTC2983, the thermocouple board allows the user to connect a thermocouple calibrator or an external voltage source to CH10 of the LTC2983 through a pair of banana jacks (J4 and J5). Figure 9. DC2212 Thermocouple Daughter Board 10 dc2296fa DEMO MANUAL DC2296 Hardware Setup Figure 10. DC2212 Thermocouple Board Schematic dc2296fa 11 DEMO MANUAL DC2296 Hardware Setup NOTE: Protection resistors not shown in configuration schematic Figure 11. DC2212 Software Configuration 12 dc2296fa DEMO MANUAL DC2296 Hardware Setup DC2213 Dedicated RTD Board The DC2213 dedicated RTD board (see Figure 12) demonstrates the flexibility, accuracy, and low noise features of the LTC2983 RTD sensor modes. The DC2213 provides several circuits demonstrating the features of the LTC2983. The DC2213 (see schematic diagram Figure 13 and corresponding software configuration Figure 14) provides a 2kΩ ±0.1% 10ppm/°C sense resistor on channels 2 and 3 which may be used with any of the RTD sensor circuits on this board. An additional Kelvin connection is also provided to this sense resistor on channel 1. The precise measured value of this sense resistor is stored in an onboard EEPROM which the LTC2983 demo software can read and use to configure the sense resistor value. To demonstrate the low system noise of the LTC2983, the dedicated RTD board provides a 0°C PT100 simulator (100Ω ±0.01% 10ppm/°C) on channels 3 to 6 configured as a 4-wire sensor. In addition to this the user may use this circuit to demonstrate how the rotated mode eliminates measurement error introduced by parasitic thermocouples. To facilitate this measurement, the DC2213 provides an external thermocouple interface which acts as a parasitic thermocouple. Figure 12. DC2213 Dedicated RTD Board dc2296fa 13 DEMO MANUAL DC2296 Hardware Setup To see the effects of parasitic thermocouples on non-rotated measurement modes, first measure the on-board 0°C PT100 simulator in a non-rotated configuration and see the measurement error as the thermocouple’s temperature changes. To see the benefit of the rotated measurement mode, switch from the no rotation/sharing to the rotation/ sharing configuration and see the errors introduced by the parasitic thermocouple minimized. In addition to the fixed value RTD simulator, there is also a variable resistor RTD simulator. This circuit can be used to demonstrate the range of the various LTC2983 RTD sensor modes as well as demonstrate the fault detection capabilities of the LTC2983. If the user wishes to connect an external RTD to the sensor board, a 4-position terminal block is provided. The user may connect any of the LTC2983 supported RTDs as well as custom RTDs to the DC2209 demo board through this interface. The interface may be configured for 3 or 4 wire sensors. To demonstrate the accuracy of the LTC2983, the user may also connect an RTD calibrator or precision resistors to this interface. Figure 13. DC2213 Dedicated RTD Board Schematic 14 dc2296fa DEMO MANUAL DC2296 Hardware Setup NOTE: Protection resistors not shown in configuration schematic Figure 14. DC2213 Software Configuration dc2296fa 15 DEMO MANUAL DC2296 Hardware Setup DC2214 DEDICATED Thermistor Board The DC2214 dedicated thermistor board includes several circuits (see Figure 15) to demonstrate the flexibility, accuracy, and low noise features of the LTC2983 thermistor sensor modes. The DC2214 provides a 10kΩ ±0.1% 15ppm/°C sense resistor on channels 1 and 2 which is shared with all of the thermistor sensor circuits on this board (see schematic diagram Figure 16 and corresponding software configuration Figure 17). The measured value of this sense resistor is stored in an on-board EEPROM which the LTC2983 demo software can read and use to configure the sense resistor value. To demonstrate the low system noise of the LTC2983 the dedicated thermistor board provides a 25°C 10k thermistor simulator (10kΩ ±0.1% 15ppm/°C) on channels 2-4 configured as a differential sensor. In addition to this the user may use this circuit to demonstrate how the rotated mode eliminates measurement error introduced by parasitic thermocouples. To facilitate this demonstration the DC2214 provides an external thermocouple interface which acts as a parasitic thermocouple. To see the effects of parasitic thermocouples on nonrotated measurement modes, first measure the on-board 25°C 10k thermistor simulator in a no-rotation/sharing configuration and see the measurement error as the 16 thermocouple’s temperature changes. To see the benefit of the rotated measurement mode, switch to the rotation/ sharing configuration and see the errors introduced by the parasitic thermocouple disappear (the effects are more significant with lower excitation current). The DC2214 also includes a 499kΩ (0.1% 15ppm/°C) thermistor simulator on channels 9 and 10. Ideally, this resistor simulates –30.59°C for a 44008 (30k) thermistor and –51.94°C for a 44006 (10k) thermistor. Note, the 10k thermistor reports the temperature, but also indicates a soft fault since the temperature is below the thermistor’s specified minimum temperature. In addition to the fixed value thermistor simulators, there is a variable resistor thermistor simulator as well. This circuit can be used to demonstrate the range of the various LTC2983 thermistor sensor modes as well as demonstrate the fault detection capabilities of the LTC2983. If the user wishes to connect an external thermistor to the daughter board, a 2-position terminal block is provided. The user may connect any of the LTC2983 supported thermistors as well as custom thermistors to the DC2209 demo board through this interface. To demonstrate the accuracy of the LTC2983, the user may connect external resistance standards to this interface. dc2296fa DEMO MANUAL DC2296 Hardware Setup Figure 15. DC2214 Thermistor Daughter Board dc2296fa 17 DEMO MANUAL DC2296 Hardware Setup Figure 16. DC2214 Dedicated Thermistor Board Schematic 18 dc2296fa DEMO MANUAL DC2296 Hardware Setup Figure 17. DC2214 Software Configuration dc2296fa 19 DEMO MANUAL DC2296 Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2209 Required Circuit Components 1 21 C1-C21 CAP., NP0, 100pF 100V, 5%, 0603 MURATA, GRM1885C2A101JA01D 2 7 C22, C24, C25, C30, C31, C33, C34 CAP., X7R, 10µF 10V, 10%, 0805 MURATA, GRM21BR71A106KE51L 3 7 C23, C26, C27, C28, C29, C32, C35 CAP., X7R, 0.1µF 25V, 10%, 0603 MURATA, GRM188R71E104KA01D 4 4 E1, E2, E3, E4 TURRET, TESTPOINT 0.064" MILL-MAX, 2308-2-00-80-00-00-07-0 5 1 J1 CONN., 40P, CON-HIROSE-FX2-40P-1.27DS HIROSE, FX2-40P-1.27DS 6 1 J2 CONN., HEADER 14POS 2MM VERT GOLD MOLEX, 87831-1420 7 1 R1 RES., CHIP, 1Ω, 1/10W, 5% 0603 VISHAY, CRCW06031R00FJEA 8 1 R2 RES., CHIP, 100k, 1/10W, 1% 0603 VISHAY, CRCW0603100KFKEA 9 3 R3, R4, R5 RES., CHIP, 4.99k, 1/10W, 1% 0603 VISHAY, CRCW06034K99FKEA 10 1 U1 I.C., LTC2983CLX, LQFP48LX-7X7 LINEAR TECH., LTC2983CLX 11 1 U2 I.C., 24LC025-I/ST, TSSOP8 MICROCHIP, 24LC025-I/ST 12 2 MH1, MH2 STANDOFF, NYLON, 0.25", 1/4" KEYSTONE, 8831 (SNAP ON) CAP., X7R, 0.1uF 25V, 10%, 0603 MURATA, GRM188R71E104KA01D DC2210 Required Circuit Components 1 1 C1 2 1 J1 CONN., 40P, CON-HIROSE-FX2-40S-DAUGHTER HIROSE, FX2-40S-1.27DS(71) 3 2 J2,J3 CONN., TERM BLOCK 2.54MM 12POS PHOENIX, 1725753 4 0 R1,R2 RES., 0603 OPT 5 1 R3 RES., CHIP, 4.99k, 1/10W, 1% 0603 PANASONIC, ERJ-3EKF4991V 6 1 U1 I.C., EEPROM 2KBIT 400KHZ 8TSSOP MICROCHIP, 24LC025-I/ST 7 4 MH1-MH4 STANDOFF, NYLON, 0.25", 1/4" KEYSTONE, 8831 (SNAP ON) 20 dc2296fa A B C D C1 100pF CH2 C34 10uF 0805 R1 1 C22 10uF 0805 C3 100pF 5 C32 0.1uF C2 100pF CH3 CH1 CH4 CH5 13 14 15 16 17 18 19 20 21 22 23 24 CH7 VREFOUT VREFP GND CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 1 V+ 2 5V 6 CS 4 SCK/SCL 7 MOSI/SDA 5 MISO 10 EEVCC 9 EESDA 11 EESCL 12 EEGND 14 AUX J2 C6 100pF VREF_BYP C5 100pF CH6 HD2X7-079-MOLEX CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 VREF C23 0.1uF C4 100pF CH8 VDD C7 100pF C8 100pF VDD C9 100pF U1 LTC2983 C35 0.1uF GND CS CH10 4 SCL SDA WP A2 A1 A0 U2 24LC025-I /ST SCK SDI 6 5 7 3 2 1 SDO GND Q1 Q2 Q3 VDD GND LDO RESETN NCS SDI SDO SCK INTERRUPT 48 47 46 45 44 43 42 41 40 39 38 37 COM C12 100pF R4 4.99k EEGND Q1 Q2 Q3 C24 10uF 0805 VDD CH11 R3 4.99k C11 100pF NCS SDI SDO SCK C10 100pF CH12 R5 4.99k WP C14 100pF C17 100pF C18 100pF VDD CUSTOMER NOTICE INTERRUPT RESET R2 100k VDD CH17 C29 0.1uF VDD CH16 C28 0.1uF VDD CH15 C27 0.1uF C16 100pF CH18 E4 E2 E1 E3 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C20 100pF 2 2 SCALE = NONE 1 REV J1 A B C D D1 C1 D2 C2 D3 C3 D4 C4 D5 C5 D6 C6 D7 C7 D8 C8 D9 C9 D10 C10 HIROSE-FX2-40P-1.27DS B1 A1 B2 A2 B3 A3 B4 A4 B5 A5 B6 A6 B7 A7 B8 A8 B9 A9 B10 A10 DESCRIPTION 1ST PROTOTYPE CH2 CH4 CH6 CH8 CH10 CH12 CH14 CH16 CH18 CH20 MARK T. APPROVED DATE: N/A SIZE DEMO CIRCUIT 2209A TECHNOLOGY 02/20/2014, 05:24 PM 1 SHEET 1 1 OF 1 24-BIT PRECISION DIGITAL TEMPERATURE MEASUREMENT SYSTEM IC NO. REV. LTC2983CLX TITLE: SCHEMATIC DATE 02-20-14 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. ALL RESISTOR ARE IN OHMS, 0603. MARK T. KIM T. CH3 CH1 CH5 CH7 CH9 CH11 CH19 EEVCC CH17 EESDA CH15 EESCL CH13 COM __ ECO 1 REVISION HISTORY NOTE: UNLESS OTHERWISE SPECIFIED C21 100pF APPROVALS GND INTERRUPT RESET VDD C19 100pF CH19 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. EEVCC EESDA EESCL C15 100pF VDD C31 10uF 0805 C26 0.1uF VDD CH13 C33 10uF 0805 C30 10uF 0805 C25 10uF 0805 VDD C13 100pF 3 CH14 4 EEPROM 8 VCC 4 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. GND 13 8 GND 3 GND GND CH9 12 11 10 9 8 7 6 5 4 3 2 1 GND VREF_BYP NC GND VDD GND VDD GND VDD GND VDD GND CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 COM 25 26 27 28 29 30 31 32 33 34 35 36 CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 COM ARRAY CH20 5 A B C D DEMO MANUAL DC2296 Schematic Diagram dc2296fa 21 DEMO MANUAL DC2296 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 30 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 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 22 Linear Technology Corporation dc2296fa LT 1114 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2014