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TIPD165

Isolated, Shunt-Based Current Sensing Reference Design

Design files

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)
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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.

download Schematic — TIPD165
TIDC754.ZIP (4356 K)

Detailed schematic diagram for design layout and components

download Schematic — TIPD165
TIDRBR8.PDF (1032 K)

Detailed schematic diagram for design layout and components

download Schematic — TIPD165
TIDRBR9.PDF (780 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIPD165
TIDRBS0.PDF (63 K)

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

download Bill of materials (BOM) — TIPD165
TIDRBS1.PDF (65 K)

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

download Gerber file — TIPD165
TIDC755.ZIP (1371 K)

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

download Gerber file — TIPD165
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

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

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28075-Q1 — Automotive C2000™ 32-bit MCU with 120 MHz, FPU, TMU, 512 KB flash, CLA, SDFM

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28076 — C2000™ 32-bit MCU with 120 MHz, FPU, TMU, 512 KB flash, CLA, CLB, SDFM

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28374D — C2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 512 KB flash, EMIF, 12b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28374S — C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 512 KB flash, EMIF, 12b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28375D — C2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, EMIF, 12b ADC

Data sheet: PDF
C2000 real-time microcontrollers

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

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28375S-Q1 — Automotive C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, EMIF, 12b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28376D — C2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 512 KB flash, EMIF, 16b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28376S — C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 512 KB flash, EMIF, 16b ADC

Data sheet: PDF
C2000 real-time microcontrollers

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

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28377D-EP — C2000™ Enhanced Product 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1 MB flash, EMIF, 16b ADC

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28377D-Q1 — Automotive C2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, EMIF, 16b ADC

Data sheet: PDF
C2000 real-time microcontrollers

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

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28377S-Q1 — Automotive C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, EMIF, 16b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28378D — C2000™ 32-bit MCU with 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 12b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28378S — C2000™ 32-bit MCU with 400 MIPS, 1xCPU, 1xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 12b ADC

Data sheet: PDF
C2000 real-time microcontrollers

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

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28379D-Q1 — Automotive C2000™ 32-bit MCU w/ 800 MIPS, 2xCPU, 2xCLA, FPU, TMU, 1024 KB flash, CLB, EMIF, 16b ADC

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28379S — C2000™ 32-bit MCU with 400-MIPS, 1x CPU, 1x CLA, FPU, TMU, 1024-KB flash, CLB, EMIF and 16-

Data sheet: PDF
Isolated ADCs

AMC1304M05 — ±50-mV input, precision current sensing reinforced isolated modulator with LDO

Data sheet: PDF | HTML
Isolated ADCs

AMC1304M25 — ±250-mV input, precision current sensing reinforced isolated modulator with LDO

Data sheet: PDF | HTML
Isolated ADCs

AMC1305M05 — ±50-mV input, precision current sensing reinforced isolated modulator

Data sheet: PDF | HTML
Isolated ADCs

AMC1305M25 — ±250-mV input, precision current sensing reinforced isolated modulator

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

TPS795 — 500-mA, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Transformer drivers

SN6501 — Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet: PDF | HTML

Start development

Software

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
Technical article The case for isolated delta-sigma modulators: Is my system fast enough for short-circuit detection? Nov. 10, 2014

Related design resources

Reference designs

REFERENCE DESIGN
TIPD165 — Isolated, Shunt-Based Current Sensing Reference Design

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