High Accuracy AC Current Measurement Reference Design using PCB Rogowski Coil Sensor

(ACTIVE) TIDA-01063

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Key Document

Description

TIDA-01063 is a reference design for current sensing using a PCB Rogowski Coil sensor to achieve very good linearity for wide measurement range at very low system BOM cost. PCB Rogowski sensor is advantageous for isolated current measurement due to very high bandwidth of 20 MHz and fast settling time of 50 ns. Auto-zeroing, 12nV/√Hz noise density of INA188 makes it suitable to achieve 12 bit system resolution for full scale current of 1000 A. Using simple IIR digital integration algorithm and scalable sampling rate it is possible to achieve better magnitude and phase response.

Features
  • 0.058% Non-Linearity (Least Square Best Fit Straight Line)
  • Very high sensor bandwidth of 20 MHz
  • Uncalibrated accuracy of 0.2%
  • Theoretical settling time of 50 ns
  • No core saturation

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA188  36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM2776  Switched Capacitor Inverter  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
LP5907  250mA ultra-low-noise low-Iq low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
REF2025  8ppm/°C Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA188 Download Download
LM2776 Download Download
LP5907 Download Download
Download -
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REF2025 Download -

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Technical Documents

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

User guides (1)
Title Abstract Type Size (KB) Date
PDF 1704 05 Jul 2016
Design files (7)
Title Abstract Type Size (KB) Date
PDF 321 07 Jun 2016
PDF 81 07 Jun 2016
PDF 822 07 Jun 2016
PDF 173 07 Jun 2016
ZIP 408 07 Jun 2016
ZIP 1328 07 Jun 2016
PDF 373 07 Jun 2016
Related Tools & Software

Reference Designs  ( 1 )

Name Part Number Tool Type
Three Phase AC Current Measurements Using Current Transformer Reference Design  TIDA-00753  TI Designs

Software (1)



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