8-ch Isolated High Voltage Analog Input Module Reference Design


Design files


This reference design is a high-voltage analog input module with eight channels. Each channel can be used for both voltage and current measurement. The design uses 16-bit analog-to-digital converter (ADC) ADS8681 that can handle input voltage of up to ±12.288 V. This make any preprocessing of standard input voltages in the industrial space unnecessary. In addition, four channels of the design are able to handle common-mode (CM) voltages of up to ±160 V. Therefore, the user does not need to worry about ground loops or compensation currents flowing between the connected inputs.

  • High voltage inputs of up to ±12.288 V
  • Voltage and current measurement for every channel
  • 4 channels with common-mode of up to ±160 V
  • -85-dB crosstalk rejection for adjacent channels
  • 100-MOhm input impedance
  • Surge transient immunity according to EN 61000-4-5 Class 2 (±1 kV, 24 A)
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data

TIDRMI9.PDF (1712 K)

Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRMJ3.ZIP (2326 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRMJ2.PDF (3865 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
* Design guide 8-ch Isolated High Voltage Analog Input Module Design Guide (Rev. A) Aug. 30, 2016

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