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User's Guide

SLAU094A–October 2002– Revised May 2011

ADS7861/8361/7863EVM

This user's guide describes the characteristics, operation, and use of the ADS7861/8361/7863EVM. This

evaluation model (EVM) is an evaluation board for the ADS7861, ADS7863, and ADS8361, a family of

12-/16-bit, dual, 500-kSPS, 2+2 channel, serial analog-to- digital converters (ADCs). The EVM allows

evaluation of all aspects of the ADS7861/7863/8361 devices. Complete circuit descriptions, a schematic

diagram, and a bill of materials are included in this document.

The following related documents are available for download through the Texas Instruments web site at

http://www.ti.com.

Summary of content (9 pages)

PAGE 1
User's Guide SLAU094A – October 2002 – Revised May 2011 ADS7861/8361/7863EVM ADS7861/8361/7863EVM This user's guide describes the characteristics, operation, and use of the ADS7861/8361/7863EVM. This evaluation model (EVM) is an evaluation board for the ADS7861, ADS7863, and ADS8361, a family of 12-/16-bit, dual, 500-kSPS, 2+2 channel, serial analog-to- digital converters (ADCs). The EVM allows evaluation of all aspects of the ADS7861/7863/8361 devices.
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EVM Overview www.ti.com 1 EVM Overview 1.
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Digital Interface www.ti.com 3 Digital Interface The ADS7861/8361/7863EVM is designed for easy interfacing to multiple control platforms. Samtec part numbers SSW–110–22–F–D–VS–K and TSM–110–01–T–DV–P provide a convenient, 10-pin dual row header/socket combination at J2. This header/socket provides access to the digital control and serial data pins of the ADS7861/8361. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector options.
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Power Supplies 4 www.ti.com Power Supplies The ADS7861 EVM board requires 5 VDC for both the analog and digital sections of the ADC. While filters are provided for all power-supply inputs, optimal performance of the EVM requires a clean, well-regulated power source. Positive 5-VDC power is applied to J3 and J4 (pin 1 referenced to pin 2). The ADS8361 and ADS7863 each require 5 VDC for the analog supply located on J3, and 2.7 V to 5.5 VDC for the digital supply located on J4.
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Schematic, Bill of Materials, and Layout www.ti.com 6 Schematic, Bill of Materials, and Layout A schematic for the ADS7861/8361/7863EVM is appended to this user's guide. The bill of materials is provided in Table 4. 6.1 Bill of Materials NOTE: All components should be compliant with the European Union Restriction on Use of Hazardous Substances (RoHS) Directive. Some part numbers may be either leaded or RoHS. Verify that purchased components are RoHS-compliant.
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Revision History www.ti.com Revision History Changes from Original (October, 2002) to A Revision ................................................................................................... Page • • • Updated entire document to current standards ....................................................................................... 1 Added ADS7863EVM to document contents ......................................................................................... 1 Added figure of EVM ................
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1 2 3 4 5 6 Revision History REV ECN Number Approved D D AVdd U3A 8 C22 1000pF 3 1 2 U1 4 OPA2365 R15 49.9 R14 49.9 49.9 R16 J2 R1 NI U3B 6 R2 7 5 2 C1 100pF 3 C9 4 5 49.9 R3 49.9 C W5 J1 1 3 5 7 9 11 13 15 17 19 W4 R4 2 4 6 8 10 12 14 16 18 20 6 C3 100pF 7 C10 8 R6 9 R8 RD W1 C11 TP1 10 Data A A1A0+ A0REFout M0 A0 (SDI) REFin Data B C21 0.
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Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.