DC682A AD | Alldatasheet

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8-Channel, 16-Bit, 100ksps SoftSpan ADC Demonstration circuit 682A features the LT C®1859 8-channel, 16-bit SoftSpan™ ADC. The LTC1859 can be software programmed for 0V to 5V, 0V to 10V, ±5V, or ±10V input spans while operating from a single 5V sup- ply. The 8-channel multiplexer can be programmed for single-ended inputs or differential pairs or a combination of both. Also, the inputs are fault protected to ±25V. A L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks and SoftSpan and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BoarD photo fault condition on any channel will not affect readings on other channels. Design files for this circuit board are available at http://www.linear.com/demo SINGLE-ENDED INPUT DIFFERENTIAL INPUT TO DC590VDIFF/2 VDIFF/2 VCM +– + – REFERENCE MONITOR (OR EXTERNAL REFERENCE–SEE HARDWARE SETUP) Figure 1. DC682A Connection Diagram

channel or range indicator in the display. Help menu item, as features may be added periodically. Figure 2. DC682A Software Screenshot

JP1: Select connection for COM pin, either grounded or externally supplied through the COM turret. JP2: Select reference, either internal or the onboard LT1019 reference. Analog Connections (Turret Posts) COM: LTC1859 COM pin. Make sure to select EXT on JP1 when supplying an external bias to this post. CH0–CH7: Analog inputs to LTC1859. Each input is by passed to ground with a 1000pF capacitor. VREF: Reference pin on LTC1859. When JP2 is set to INT, the LTC1859 uses its internal reference, or an external reference can be connected to this pin, overdriving the internal reference. When JP2 is set to LT1019, this turret should only be used for monitoring the reference voltage. Grounding and Power Connections DC682A does not require any external power source when used with the DC590 USB controller board. However, an external 5V power source can be connected to the VCC and ground turrets if the power supply on DC590 has been disabled. Refer to the DC590 demo manual for more information.

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 1 3 C1, C3, C14 CAP., X7R, 0.1µF, 10V, 20%, 0603 AVX, 0603ZC104MAT2A 2 2 C2, C5 CAP., X5R, 10µF, 6.3V, 20%, 0805 Taiyo Yuden, JMK212BJ106MG 3 8 C6–C13 CAP., COG, 1000pF, 50V, 5%, 0603 AVX, 06035A102JAT 4 1 C15 CAP., X5R, 4.7µF, 6.3V, 20%, 0805 Taiyo Yuden, JMK212BJ475MG 5 14 E1–E14 TURRET, TESTPOINT .064" MILL-MAX, 2308-2 6 2 JP1, JP2 0.079 SINGLE ROW HEADER, 3-PIN COMM CON, 2802S-03-G2 7 2 JP1, JP2 SHUNT, COMM CON, CCIJ2MM-138G 8 1 J1 CONNECTOR, DUAL 2 × 7 .079CC MOLEX, 87331-1420 9 1 R1 RES., CHIP, 100, 1/16W, 5% 0603 AAC, CR16-101JM 10 2 R2, R3 RES., CHIP, 4.99k, 1/16W, 1% 0603 AAC, CR16-4991FM 11 1 U1 I.C. LTC1859CG SSOP28G LINEAR, LTC1859CG 12 1 U2 MUL TIPLEXER, NC7SZ157P6X SC70 FAIRCHILD, NC7SZ157P6X 13 1 U3 I.C., Serial EEPROM TSSOP8 MICROCHIP, 24LC025 14 1 U4 I.C., LT1019ACS8-2.5 SO-8 LINEAR, LT1019ACS8-2.5

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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. schematic Diagram D D C C B B A A COM EXT GND CH0 CH1 COM CH2 CH3 CH4 CH5 CH6 CH7 GND GND VREF GND VCC LT1019 INT. ADC682A Monday, November 10, 2003 1 1 June Wu 4/30/03 M. Thoren 4/30/03 LTC1859CG, 8-Channel, 16-Bit, 100ksps SoftSpan ADC SIZE SCALE: CAGE CODE DWG NO REV SHEET OFFILENAME: TITLE CONTRACT NO. APPROVALS DATE DRAWN CHECKED APPROVED ENGINEER DESIGNER TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE CS MISO SCK MOSI VIN VIN VCC VCC VCC E12 C14 0.1uF LTC1859CG 14 15 28COM CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 MUXOUT+ MUXOUT- ADC+ ADC- AGND1 VREF REFCOMP AGND2 AGND3 AVP DVP OVP BUSY SDO DGND SDI SCK RD CONVST JP2 C6 1000pF 4.99K 0.1uF 10uF 24LC025 4 5 2 7 8A0 SCLA2 VSS SDA A1 WP VCC C15 4.7uF 4.99K 100 E14 10uF LT1019ACS8-2.5 4 5 8DNC INPUT TEMP GND TRIM OUTPUT DNC DNC C8 1000pF C9 1000pF C10 1000pF C11 1000pF E11 C12 1000pF C13 1000PF NC7SZ157P6X 3 4 6I1 GND I0 Z Vcc S JP1 E10 E13 0.1uF C7 1000pF

DEMO MANUAL DC682A Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com  LINEAR TECHNOLOGY CORPORATION 2013 LT 0613 • PRINTED IN USA DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LT C) 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 ONL Y and is not provided by LT C 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 LT C 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. LT C assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LT C 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 LT C applica- tion engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation