Isolated Current Shunt and Voltage Measurement Reference Design for Motor Drives Using AM437x
TIDA-00209
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
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
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Schematic/Block Diagram
Quickly understand overall system functionality.

Download Schematic
Test Data
Get results faster with test and simulation data that's been verified.

Download Test Data
TI Devices (12)
Order samples, get tools and find more information on the TI products in this reference design.
Sample & Buy |
Design Kits & Evaluation Modules |
AM4376 |
Sitara processor: Arm Cortex-A9, PRU-ICSS |
Processors |
Sample & Buy |
View Design Kits & Evaluation Modules |
AM4377 |
Sitara processor: Arm Cortex-A9, PRU-ICSS, EtherCAT |
Processors |
Sample & Buy |
View Design Kits & Evaluation Modules |
AM4378 |
Sitara processor: Arm Cortex-A9, PRU-ICSS, 3D graphics |
Processors |
Sample & Buy |
View Design Kits & Evaluation Modules |
AM4379 |
Sitara processor: Arm Cortex-A9, PRU-ICSS, EtherCAT, 3D graphics |
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 |
Power for signal isolators |
Sample & Buy |
View Design Kits & Evaluation Modules |
CAD/CAE symbols
Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
Step 3: Open the .bxl file with the Ultra Librarian software.
You can always access the complete CAD/CAE Symbols database at https://webench.ti.com/cad/
Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a (free download.).
The UL Reader is a subset of the Ultra Librarian toolset that can generate, import, and export components and their attributes in virtually any EDA CAD/CAE format.
Technical documentation
See the Important Notice and Disclaimer covering reference designs and other TI resources.
User guide (1)
Title | Type | Size (KB) | Date |
| PDF | 9174 |
19 Feb 2015
|
Selection guide (1)
Title | Type | Size (KB) | Date |
| PDF | 9699 |
22 Mar 2017
|
Design files (6)
| 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
Support & training
Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.
Search answers from TI experts
Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.
If you have questions about quality, packaging, or ordering TI products visit our Support page.