Active Integrator for Rogowski Coil Reference Design with Improved Accuracy for Relay and Breaker

(ACTIVE) TIDA-00777

Description & Features

Technical Documents

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Key Document

Description

The TIDA-00777 TI Design shows an active integrator design that covers wide input current range for Rogowski Coil with excellent 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 for precision measurement with less than 3O phase error and the other for fast response time (<15ms 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 (Ex: ADS131A04 with 0-5V or ±2.5V input)
  • Integrator has been tested for accuracy at 50/60Hz, repeatability and temperature stability over 25°C ± 35°C
  • The integrator operates from a single 5V DC input with positive and negative voltages for bipolar operation generated on board.

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Schematic/Block Diagram

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Design Files

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM4040-N  100-ppm/°C precision micropower shunt voltage reference  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
LP2951-N  Series of Adjustable Micropower Voltage Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules
OPA188  Precision, Low-Noise, Rail-to-Rail Output, 36V Zero-Drift Operational Amplifier   Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA2188  0.03µV/°C, 6µV Vos, Low Noise, Rail-to-Rail Output, 36V Zero-Drift Operational Amplifier   Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS60403  60mA Charge Pump Voltage Inverter with Fixed 250kHz Operation  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS723  200mA Negative-Output Low-Dropout (LDO) Linear Regulator  Power management  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM4040-N Download Download
Download Download
Download Download
LP2951-N Download Download
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OPA188 Download Download
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OPA2188 Download Download
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TPS60403 Download Download
TPS723 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Design files (6)
Title Abstract Type Size (KB) Date
ZIP 2290 07 Jul 2016
ZIP 1854 07 Jul 2016
PDF 1974 07 Jul 2016
ZIP 339 07 Jul 2016
PDF 135 07 Jul 2016
PDF 835 07 Jul 2016
More literature (1)
Title Abstract Type Size (KB) Date
PDF 1614 29 Sep 2016
Related Tools & Software

Development Tools (1)

Name Part Number Tool Type
SPICE-based analog simulation program  TINA-TI  Circuit Design & Simulation 

Models (2)

Title Category Type Size (KB) Date Views
TIDA-00777 Simulation File (Precision Measurement) TINA-TI Reference Design ZIP 128 KB 22 Aug 2018
TIDA-00777 Simulation File (Protection) TINA-TI Reference Design ZIP 130 KB 22 Aug 2018

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