Isolated Current Shunt and Voltage Measurement Reference Design for Motor Drives Using AM437x
TIDA-00209
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Key Document

Description

This reference design uses the AMC130x reinforced isolated delta-sigma modulators along with AM437x Sitara™ ARM® Cortex® -A9 Processor, which implements Sinc filters on PRU-ICSS. The design provides an ability to evaluate the performance of these measurements: three motor currents, three inverter voltages, and the DC Link voltage.  Provided in the reference design is firmware to configure the Sinc filters, set the modulator frequency, and receive data from Sinc filters. A versatile run-time GUI is also provided to help the user validate the AMC130x performance and supports configuration changes to Sinc filter parameters in the Sitara™ Processor.

Features
  • Unique lower input voltage range of 50mV allows use of smaller shunt resitors enabling lower cost and heat dissipation
  • Implements Sinc3 Digital Filters on AM437x Sitara™ ARM® Cortex® -A9 Processor with proprietary programmable real-time unit (PRU-ICSS)
  • Precise measurements across reinfoced isolation barrier : calibrated accuracy of ±0.2%
  • Fast (<4uSec) response time for Short Circuit protection using Sinc3 filter with OSR of 16, eliminating the need for external components
  • Run-time Run-time GUI for complete performance analysis of modulator clock, sinc filter parameters, and currrent and voltage waveforms

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TI Devices (12)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AM4376  Sitara Processor: Arm Cortex-A9, PRU-ICSS  Sitara processors  Sample & Buy View Design Kits & Evaluation Modules
AM4377  Sitara Processor: Arm Cortex-A9, PRU-ICSS, EtherCAT  Sitara processors  Sample & Buy View Design Kits & Evaluation Modules
AM4378  Sitara Processor: Arm Cortex-A9, PRU-ICSS, 3D graphics  Sitara processors  Sample & Buy View Design Kits & Evaluation Modules
AM4379  Sitara processor: Arm Cortex-A9, PRU-ICSS, EtherCAT, 3D graphics  Sitara processors  Sample & Buy View Design Kits & Evaluation Modules
AMC1304M05  Reinforced Isolated Modulator With LDO Regulator, ±50mV Input, and CMOS Interface  Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1304M25  Reinforced Isolated Modulator With LDO Regulator, ±250mV Input, and CMOS Interface  Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1305M05  Reinforced Isolated Modulator With ±50mV Input and CMOS Interface  Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1305M25  Reinforced Isolated Modulator With ±250mV Input and CMOS Interface  Isolation  Sample & Buy View Design Kits & Evaluation Modules
CDCLVC1108  Low Jitter, 1:8 LVCMOS Fan-out Clock Buffer  Clocks & timing  Sample & Buy View Design Kits & Evaluation Modules
INA826  Precision, 200-μA Supply Current, 36-V Supply Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
OPA211  1.1nV/rtHz Noise, Low-Power, Precision Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
SN6501  Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
AM4376 Download -
AM4377 Download -
AM4378 Download -
AM4379 Download -
AMC1304M05 Download Download
AMC1304M25 Download Download
AMC1305M05 Download Download
AMC1305M25 Download Download
CDCLVC1108 Download Download
INA826 Download Download
Download Download
Download -
OPA211 Download Download
Download Download
Download -
SN6501 Download Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 9174 19 Feb 2015
Selection guides (1)
Title Type Size (KB) Date
PDF 9699 22 Mar 2017
Design files (6)
Title Type Size (KB) Date
ZIP 9637 10 Mar 2015
ZIP 582 10 Mar 2015
ZIP 2388 10 Mar 2015
ZIP 1471 10 Mar 2015
ZIP 210 10 Mar 2015
ZIP 761 10 Mar 2015
Related Tools & Software

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
AM437x Industrial Development Kit (IDK)  TMDXIDK437X  Development Kits 

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