10uA-100mA, 0.05% Error, High-Side Current Sensing Solution Reference Design
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Key Document
Description
This TI Precision Verified Design provides the theory, component selection, simulation, complete PCB schematic and layout, bill of materials, and measured performance of a split-supply, high-side four decade current sensing solution that can accurately detect load currents from 10uA-100mA. The corresponding linear output is from 10mV to 4.9V which enables measurement by common 5V ADCs. The design utilizes the PGA281, an instrumentation amplifier with pin-programmable gain and a wide common-mode voltage range, to provide a more accurate and versatile solution than traditional op amps.
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Features
- High-Side, Four Decade, Bi-directional, Current Sensing Verified Solution
- Senses Current from 10uA-100mA with <0.05% Error
- Supports up to ±12.5V Common-mode Input Range
- 10mV to 4.9V output for measurement by common 5V ADCs
- Utilizes PGA281 pin-programmable gain instrumentation amplifier to achieve four decade current measurement
This Verified Design Includes:
- Theory
- Component Selection
- TINA-TI Simulation
- Schematics and PCB Layout
- Verification and Measured Performance
- Modification Options
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Schematic/Block Diagram
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Test Data
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Bill of Materials (BOM)
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TI Devices (2)
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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 http://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 Documents
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User guides (1)
Title | Abstract | Type | Size (KB) | Date |
| | PDF | 976 |
03 Oct 2013
|
Design files (3)
| | PDF | 188 |
03 Oct 2013
|
| | PDF | 144 |
03 Oct 2013
|
| | ZIP | 680 |
03 Oct 2013
|
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