UNIPOLAR/BIPOLAR
SOURCE SMA ACCESS
OPA320 ADC DRIVER
GND TEST POINT
REF5040 ADC REFERENCE
ADS8681 ADC
DVDD TEST POINT
PRECISION HOST INTERFACE
BOARD (PHI) CONNECTOR
LDO INPUT
(+5V TEST POINT)
GND TEST POINT
LOW NOISE LDO
More information about Precision Analog SAR ADCs can be found at http://www.ti.com/precisionadc
The platform bar and multiSPI are trademarks of Texas Instruments. All other trademarks are the property of their
respective owners. © 2016 Texas Instruments Incorporated.
SLYU037
Quick Start Guide:
ADS8681EVM-PDK
The ADS8681 Performance Demonstration Kit (PDK) is ideal for evaluating and starting development with the
ADS8681 precision analog to digital converter. This kit is comprised of an ADC evaluation board (EVM), a
precision host interface board (PHI), a micro USB cable and board attachment screws. The EVM features
one SMA connector that supports unipolar or bipolar analog input signals for the ADC. The ADS8681
transfers data to the PHI board via the multiSPI™ digital interface. An easy-to-use PC-based application
(GUI) is available to help evaluate the performance of the ADC on the ADS8681 EVM.
ADS8681EVM-PDK Features:
- 16pin TSSOP or WQFN ADS8681 16-bit, 1MSPS ADC
- OPA320 low distortion ADC driver
- 4.096V REF5040 reference
- TPS7A49 low noise LDO
- Bipolar or unipolar input signal
- Micro USB PC interface
IMPORTANT: The ADS8681 performance
demonstration kit software must be installed
before the USB cable is plugged into the PC.
The complete user guide for the kit can be found at
http://www.ti.com/lit/ug/sbau252/sbau252.pdf
The software may be downloaded from
http://www.ti.com/tool/ADS8681EVM-PDK
Quick Start Guide: ADS8681 SAR ADC
Performance Demonstration Kit
IMPORTANT: The ADS8681 performance
1
Download and install the ADS8681EVM-PDK GUI Software
http://www.ti.com/tool/ADS8681EVM-PDK
NOTE: The Performance Demonstration Kit software
supports Windows® 7 and 8 64-bit operating systems
demonstration kit software must be installed
before the USB cable is plugged into the PC.
3
Connect the micro USB cable to the Precision Host Interface Board and the PC
Connect the Precision Host Interface (PHI) Board to the ADS8681 EVM Board
2
ADS8681 EVM Board
IMPORTANT: The included screws should be used to make a
secure connection between the two boards to avoid damage.
NOTE: Remove the standoff if
installed on the PHI Board
before connecting to the EVM
Precision Host Interface
(PHI) Board
4
Launch the ADS8681EVM-PDK GUI software on the PC from the ‘Start’ menu
An unipolar/bipolar input signal can be connected to the
EVM’s SMA connector and conversion results can be
viewed using the GUI software.
UNIPOLAR/BIPOLAR
SOURCE SMA ACCESS
The GUI software also include data analysis tools to
evaluate the ADC’s DC, AC and settling parameters.
Technical support for Precision ADCs can be found at http://www.ti.com/precisionadcsupport
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