IC manufacturers Texas Instruments

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Texas Instruments LM2776 | Demoboard TIDA-01063

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

Overview

TopologyHigh Voltage Output
Input voltage2.5-5.5 V
Output 1-3.3 V

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

Remark: BOM and Schematics are added with EVM board.

  • 0.058% Nonlinearity (Least Square Best FitStraight Line)
  • Very High Sensor Bandwidth of 20 MHz
  • Uncalibrated Accuracy of 0.2%
  • Theoretical Settling Time of 50 ns
  • No Core Saturation
  • Current Sensing for Multi-Conductor Using SingleSensor
  • Low Footprint and BOM Cost

Typical applications

  • ID and FD Fan, Screw Feeder, Feed Pump, Steam Boiler
  • Elevators and Escalators: Traction Inverter Motor Control
  • HVAC Systems: HVAC Motor Control, Compressor, Chiller, Blower

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
50% typ.(°)
Samples
WL-SMCW SMT Mono-color Chip LED Waterclear, 525 nm, Green
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Dominant Wavelength [typ.]525 nm
Emitting ColorGreen 
Peak Wavelength [typ.]515 nm
Luminous Intensity [typ.]430 mcd
Forward Voltage [typ.]3.2 V
Chip TechnologyInGaN 
Viewing Angle Phi 0° [typ.]140 °