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


Design files


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.

  • 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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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

TIDRM37.PDF (373 K)

Detailed schematic diagram for design layout and components

TIDRM36.PDF (81 K)

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

TIDRM34.PDF (173 K)

Detailed overview of design layout for component placement

TIDRM33.ZIP (1328 K)

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

TIDCC92.ZIP (408 K)

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

TIDRM35.PDF (822 K)

PCB layer plot file used for generating PCB design layout

TIDRM38.PDF (321 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Instrumentation amplifiers

INA18836-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier

Data sheet: PDF | HTML
Charge pumps (inductorless)

LM2776Switched Capacitor Inverter

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP5907250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

Data sheet: PDF | HTML
Series voltage references

REF20258-ppm/°C drift, low-power, dual-output Vref & Vref/2 voltage reference

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide High Accuracy AC Current Measurement Using PCB Rogowski Coil Sensor Design Guide (Rev. A) Jul. 05, 2016

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