Leakage Current Measurement Reference Design for Determining Insulation Resistance
TIDA-00440
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 TI design provides a reference solution to measure Insulation Resistance up to 100MΩ. It has an on-board isolated 500Vdc power supply and an isolated signal conditioning circuit to measure the leakage current. This design is useful to find leakage due to insulation breakdown in transformer and motor windings.
Features
- Leakage current measurement circuit with option for: Programmable Current Sense Amplifier and Switchable Shunt Resistors
- Range of measurement: 0 to 100MΩ with accuracy of 5% (Un-calibrated)
- Test voltage level derived from IEEE 43-2000 ("Recommended Practice for Testing
- Insulation Resistance of Rotating Machinery")
- On-board Isolated 500V Power Supply to measure the insulation resistance
- Provision for Calibration Resistor on board
- Hardware support for Start-of-Frame Detect allows implement IEEE1588 PTP
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 (8)
Order samples, get tools and find more information on the TI products in this reference design.
| Sample & Buy |
Design Kits & Evaluation Modules |
| CSD13202Q2 |
12-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 9.3 mOhm |
MOSFETs |
Not Available |
Not Available |
| INA225 |
36V, bi-directional current sense amplifier w/ four pin-selectable gain settings |
Current sense amplifiers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| INA333 |
Low-Power, Zero-Drift, Precision Instrumentation Amplifier |
Amplifiers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| ISO7640FM |
Quad-channel, 4/0, 150-Mbps, default output low digital isolator |
Isolation |
Sample & Buy |
View Design Kits & Evaluation Modules |
| LM5160A |
LM5160A Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter |
Offline & isolated DC/DC controllers & converters |
Sample & Buy |
View Design Kits & Evaluation Modules |
| LP2985-N |
150-mA, 16-V, low-dropout voltage regulator with enable |
Power management |
Sample & Buy |
View Design Kits & Evaluation Modules |
| TS5A23157 |
5-V, 2:1 (SPDT), 2-channel analog switch |
Switches & multiplexers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| UCC28711 |
Constant-voltage, constant-current PWM with PSR, valley switching, NTC option, and 0-mV cable comp. |
Offline & isolated DC/DC controllers & converters |
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 | 2507 |
30 Apr 2015
|
Selection guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 1772 |
04 Apr 2018
|
Design files (6)
| | ZIP | 897 |
27 Mar 2015
|
| | ZIP | 6588 |
27 Mar 2015
|
| | ZIP | 288 |
27 Mar 2015
|
| | ZIP | 248 |
27 Mar 2015
|
| | PDF | 68 |
27 Mar 2015
|
| | ZIP | 847 |
27 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.
