TIDA-00777
Active Integrator for Rogowski Coil Reference Design with Improved Accuracy for Relay and Breaker
TIDA-00777
Overview
This reference design shows an active integrator design that covers wide-input current range for Rogowski Coil with accuracy, linearity, stability and repeatability. The integrator uses a precision amplifier with very-low offset and temperature drift. Two configurations of the integrator are shown. One is for precision measurement with less than 3O-phase error and the other is for fast response time (< 15-ms RC). While the output signal is bipolar, optional level shifting stage can be used when unipolar output is required.
Features
- Active integrator design using low offset and close to zero drift amplifier (OPA2188)
- Integrator output compatible with unipolar or bipolar ADC input range (Example: ADS131A04 with 0-5-V or ±2.5-V input)
- Integrator has been tested for accuracy at 50/60 Hz, repeatability and temperature stability over 25°C ± 35°C
- The integrator operates from a single 5-V DC input with positive and negative voltages for bipolar operation generated on board.
Industrial
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
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
Products
Includes TI products in the design and potential alternatives.
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Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Active Integrator Rogowski Coil for Relay and Breaker Design Guide (Rev. A) | Sep. 29, 2016 |
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