Texas Instruments ADS8881EVM-PDK User Manual

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

This user's guide describes the operation and use of the

an 18-bit true-differential unipolar successive approximation register (SAR) analog-to-digital converter

(ADC) with a maximum throughput of 1 MSPS. It is a very low power ADC with excellent noise and

distortion performance for ac or dc signals. The performance demonstration kit (PDK) eases EVM

evaluation with additional hardware and software for computer connectivity through universal serial bus

(USB). The

ADS8881EVM-PDK

to-B USB cable, and 6-V wall-adapter power supply. This user's guide covers circuit description,

schematic diagram, and bill of materials for the ADS8881EVM daughter card.

The following related documents are available through the Texas Instruments website at http://www.ti.com.

ADCPro is a trademark of Texas Instruments.

Windows is a registered trademark of Microsoft Corporation.

C is a trademark of NXP Semiconductors.

All other trademarks are the property of their respective owners.

SBAU211 – June 2013

Submit Documentation Feedback

ADS8881EVM-PDK

includes the ADS8881EVM as a daughter card, MMB0 motherboard, A-

Need help?

Do you have a question about the ADS8881EVM-PDK and is the answer not in the manual?

Questions and answers

Summary of Contents for Texas Instruments ADS8881EVM-PDK

Page 1 USB cable, and 6-V wall-adapter power supply. This user's guide covers circuit description, schematic diagram, and bill of materials for the ADS8881EVM daughter card. The following related documents are available through the Texas Instruments website at http://www.ti.com. Related Documentation...
Page 2: Table Of Contents
J1: Analog Interface Pinout (Samtec 10 x 2) ......................SMA Analog Inputs ....................J2: Serial Interface Header ..................J3: Power-Supply Interface Header ..................ADS8881EVM Bill of Materials ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 3: Ads8881Evm-Pdk Overview
Data collection to text files • Built-in analysis tools including scope, FFT, and histogram displays • Easily expandable with new analysis plug-in tools from Texas Instruments SBAU211 – June 2013 ADS8881EVM-PDK Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 4: Evm Analog Interface
0 V to 2.25 V. 4.3V 2.25V 0.1V +2.15V AINP A0(-) +4.3V -2.15V 10000pF Vocm =+2.25V THS4521 +2.15V -4.3V A0(+) AINN -2.15V 4.3V 2.25V 0.1V Figure 1. Differential Input Example ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 5: Single Ended Signal Example
1µF Vref THS4281 OPA333 4.5V from 0.22 REF5045 1µF 1µF 10µF Figure 3. THS4281 Reference Driver with Complementary OPA333 for Drift and Offset Correction SBAU211 – June 2013 ADS8881EVM-PDK Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 6: Evm Digital Interface
C bus that records the board name and assembly date to communicate with the onboard EEPROM. It is not used in any form by the ADS8881 converter. ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 7: Evm Power Supply Inputs
The EVM only has one ground plane for analog and digital supplies, so pins J3.5 and J3.6 are tied together to this ground plane. Therefore, both supply grounds should be connected to pins J3.5–6 so they share the same ground. SBAU211 – June 2013 ADS8881EVM-PDK Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 8: Evm Digital Configuration
Tri-State. DVDD J2:1 or J2:7 ADS8881 SCLK (CLOSED) CONVST CONVST CONVST J2:17 Figure 5. Serial 4-Wire Configuration ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 9: Pdk Kit Setup
NOTE: ADCPro should be installed before attempting to install the ADS8881EVM-PDK plug-in software. The installation file link for the PDK plug-in can be found in the ADS8881EVM-PDK product folder at www.ti.com/tool/ads8881evm-pdk. In the software section look for a link with a file named ads888x- adcproplugin-<version #>.exe (<version #>...
Page 10: Mmb0 Motherboard Jumper Configuration
PDK Kit Setup www.ti.com Configuring the ADS8881EVM-PDK Hardware The ADS8881EVM-PDK contains both the ADS8881EVM and the MMB0 motherboard; however, the devices may be shipped unconnected or configured incorrectly. Follow these steps to verify that ADS8881EVM-PDK kit is properly configured and connected.
Page 11: Pdk Kit Operation
Powering up the ADS8881EVM-PDK. Once the ADS8881EVM-PDK kit is configured, power can be applied to the MMB0. This power comes from a wall supply that delivers 6 VDC to the MMB0 through J2 on the MMB0 motherboard. This wall power supply is included with the PDK.
Page 12: Ads8881Evm Plug-In: Device Configuration Tab
About— This control shows the plug-in version, MMB0 firmware version, ADS8881EVM assembly date, and ADS8881EVM board revision information. Collection Bar— This feature shows the percentage of data collected during an acquisition session. ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 13: Adcpro Test Plug-Ins
Troubleshooting If the ADS8881EVM plug-in cannot find the ADS8881EVM-PDK, press the RESET button on the MMB0 and try again. If ADCPro stops responding while the ADS8881EVM-PDK is connected, shut down and restart the ADCPro software.
Page 14: Bill Of Materials, Schematics, And Layout
ERJ-3EKF47R0V R33, R35 0603 — IC ADC 18-bit 1MSPS Fully Diff 10- Texas ADS8881IDGS MSOP Instruments — IC VREF SERIES PREC 4.5V 8-MSOP Texas REF5045IDGK Instruments ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 15 — IC OPAMP DIFF R-R 145MHZ 8MSOP Texas THS4521IDGK Instruments — IC EEPROM 256KBIT 400KHZ Microchip 24LC256-I/ST 8TSSOP — — 0.100 Shunt - Black Shunts 969102-0000-DA SBAU211 – June 2013 ADS8881EVM-PDK Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 16: Ads8881Evm Pcb: Top Layer
NOTE: Board layouts are not to scale. These figures are intended to show how the board is laid out; they are not intended to be used for manufacturing ADS8881EVM PCBs. Figure 12. ADS8881EVM PCB: Top Layer Figure 13. ADS8881EVM PCB: Ground Layer ADS8881EVM-PDK SBAU211 – June 2013 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 17: Ads8881Evm Pcb: Power Layer
Bill of Materials, Schematics, and Layout www.ti.com Figure 14. ADS8881EVM PCB: Power Layer Figure 15. ADS8881EVM PCB: Bottom Layer SBAU211 – June 2013 ADS8881EVM-PDK Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated...
Page 19 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.
Page 20 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.

This manual is also suitable for:

Ads8881