This reference design accurately measures 16-channel AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range. This range covers protection and measurement requirements (including sampling requirements as per IEC 61850-9-2), which simplifies system design and improves trip time repeatability, performance, and reliability. The AC analog input module (AIM) is isolated from the host processor using a digital isolator with an integrated power converter or using a six-channel digital isolator. In its simplest configuration, a complete AC AIM can be designed using only five TI products to optimize system cost and size. The alarm feature identifies the AC AIM faults on a sample basis for faster fault detection. The ADC has an additional auxiliary channel to diagnose the output of the digital isolator supply or to compensate the measured analog inputs for temperature drift.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
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
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | High-Accuracy Analog Input Mod RefDes 16-bit 1-MSPS Dual Simul (Rev. A) | PDF | HTML | Apr. 22, 2020 |
| Product overview | Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) | PDF | HTML | Aug. 20, 2024 | |
| Technical article | Interfacing multiple ADCs to a single processor for grid protection and control | PDF | HTML | Sep. 13, 2018 |
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