TIPD165

Isolated, Shunt-Based Current Sensing Reference Design

TIPD165

Design files

Overview

This verified reference design implements isolated current sensing data acqusition based on AMC1304M25 isolated delta-sigma (ΔΣ) modulator and TMS320F28377D microcontroller. This design was made for shunt-based current measurement applications which require excellent galvanic isolation and accuracy, such as industrial motor drives, photovoltaic inverters and energy metering.  It is capable of measuring load currents from -10 A to +10 A with better than 0.3% uncalibrated accuracy, and it also provides dual functionality of a high resolution channel and an additional over-current or short-circuit detection channel.  Design functionality and performance were verified against the circuit design goals by fabricating three PCBs and measuring results for DC and AC input signals.

Features
  • Verified design contains theory, component selection, TINA-TI simulation, measured results, PCB layout and modifications
  • Galvanically-isolated current sensing
  • 16-bit output at 78.1 kSPS
  • ±10 A at < 0.3% (uncalibrated accuracy)
  • 78-dB SNR (min)

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDC754.ZIP (4356 K)

Detailed schematic diagram for design layout and components

TIDRBR8.PDF (1032 K)

Detailed schematic diagram for design layout and components

TIDRBR9.PDF (780 K)

Detailed schematic diagram for design layout and components

TIDRBS0.PDF (63 K)

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

TIDRBS1.PDF (65 K)

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

TIDC755.ZIP (1371 K)

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

TIDC756.ZIP (1361 K)

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

Products

Includes TI products in the design and potential alternatives.

C2000 real-time microcontrollers

TMS320F28075C2000™ 32-bit MCU with 120 MHz, FPU, TMU, 512 KB flash, CLA, SDFM

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28075-Q1Automotive C2000™ 32-bit MCU with 120 MHz, FPU, TMU, 512 KB flash, CLA, SDFM

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28076C2000™ 32-bit MCU with 120 MHz, FPU, TMU, 512 KB flash, CLA, CLB, SDFM

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28374DC2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 512 KB flash, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28374SC2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 512 KB flash, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28375DC2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28375SC2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28375S-Q1Automotive C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28376DC2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 512 KB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28376SC2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 512 KB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28377DC2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28377D-EPC2000™ Enhanced Product 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1 MB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF open-in-new HTML
C2000 real-time microcontrollers

TMS320F28377D-Q1Automotive C2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28377SC2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28377S-Q1Automotive C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28378DC2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28378SC2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 12b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28379DC2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28379D-Q1Automotive C2000™ 32-bit MCU w/ 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 16b ADC

Data sheet document-pdfAcrobat PDF
C2000 real-time microcontrollers

TMS320F28379SC2000™ 32-bit MCU with 400-MIPS, 1x CPU, 1x CLA, FPU, TMU, 1024-KB flash, CLB, EMIF and 16-b ADC ;

Data sheet document-pdfAcrobat PDF
Isolated ADCs

AMC1304M05Reinforced Isolated Modulator With LDO Regulator, ±50mV Input, and CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated ADCs

AMC1304M25Reinforced Isolated Modulator With LDO Regulator, ±250mV Input, and CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated ADCs

AMC1305M05Reinforced Isolated Modulator With ±50mV Input and CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated ADCs

AMC1305M25Reinforced Isolated Modulator With ±250mV Input and CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS795500-mA, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Software

Support software

TIPD165 Simulation – TIDC757.ZIP (17 K)

Firmware

TIPD165 Software and Firmware – TIDC827.ZIP (9847 K)

Technical documentation

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Type Title Date
* User guide Isolated, Shunt-Based Current Sensing Reference Design (TIPD165) (Rev. A) Nov. 21, 2014
White paper Piccolo™ C2000™ MCUs enable the next generation of low-cost, dual-axis servo dri (Rev. A) Jul. 13, 2020
More literature TIPD165 Software and Firmware Dec. 19, 2014
Technical article The case for isolated delta-sigma modulators: Is my system fast enough for short-circuit detection? Nov. 10, 2014

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