Low-Drift Bidirectional Single-Supply Low-Side Current Sensing Reference Design
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Key Document
Description
This Verified TI Precision Design implements a low-drift, bi-directional, low-side, single-supply current sensing solution that measures load currents from -2.5 A to +2.5 A. The output range is from 250 mV to 2.75 V, with 0 A current centered at 1.5 V. To achieve low-drift performance, the solution utilizes the INA213B and REF2030. The design’s functionality and performance were verified by fabricating a PCB and measuring results over temperature from -40 °C to 125 °C.
Features
- Low-side current sensing
- Measured load current: +/-2.5 A
- 250mV to 2.75V output
- 0 A centered at 1.5 V
- ±0.0522% Full-scale range error (-40 °C to 125 °C)
- Low-drift, Single-supply
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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 (9)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| INA213 |
26V, Bi-Directional, Zero-Drift, Low-/High-Side, Voltage Output Current Sense Amplifier |
Current sense amplifiers |
Sample & Buy |
View Design Kits & Evaluation Modules |
| REF1925 |
Dual Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
Not Available |
| REF1930 |
Dual Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
Not Available |
| REF1933 |
Dual Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
View Design Kits & Evaluation Modules |
| REF1941 |
Dual Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
Not Available |
| REF2025 |
8ppm/°C Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
Not Available |
| REF2030 |
Low-Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
Not Available |
| REF2033 |
Low-Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
View Design Kits & Evaluation Modules |
| REF2041 |
Low-Drift, Low-Power, Dual-Output Vref and Vref/2 Voltage Reference |
Voltage references |
Sample & Buy |
Not Available |
CAD/CAE symbols
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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.).
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Technical Documents
View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.
User guides (1)
| Title | Abstract | Type | Size (KB) | Date |
| | | PDF | 842 |
16 Jun 2014
|
Design files (3)
| | | ZIP | 282 |
05 Jun 2014
|
| | | PDF | 110 |
05 Jun 2014
|
| | | PDF | 92 |
05 Jun 2014
|
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