The INA280 is a current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 120 V. It is in a highly space-efficient SC-70 package with a PCB footprint of only 2.0 mm × 2.1 mm. The current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±150 µV (maximum), a small gain error of ±0.5% (maximum), and a high DC CMRR of 140 dB (typical). The INA280 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.1 MHz (at gain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).
The INA280 operates from a single 2.7-V to 20-V supply and draws a 370-µA supply current (typical). The INA280 available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset and drift of the INA280 enables accurate current sensing over the extended operating temperature range of −40°C to +125°C.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | INA280 2.7-V to 120-V, 1.1-MHz, High Precision Current Sense Amplifier datasheet | 15 Oct 2020 | |
| Application note | Current Sensing in an H-Bridge (Rev. D) | PDF | HTML | 07 Apr 2023 | |
| Application note | High-Side Switch Open-Load Detection in ON-State | PDF | HTML | 05 Jul 2022 | |
| Application note | Safety and Protection for Discrete Digital Outputs in a PLC System Using Current (Rev. B) | PDF | HTML | 10 Mar 2022 | |
| Application note | Using a PCB Copper Trace as a Current-Sense Shunt Resistor | PDF | HTML | 25 Jan 2022 | |
| Application note | High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) | PDF | HTML | 23 Feb 2021 | |
| EVM User's guide | INA280EVM User's Guide | PDF | HTML | 29 Oct 2020 |
For additional terms or required resources, click any title below to view the detail page where available.
The INA280 evaluation module (EVM) is a small module with five completely independent boards that can be broken off by the designer. Five schematically identical boards are available for each of the five gain variations of the INA280 with inputs up to 120-V common-mode and 5-A (on-board shunt) (...)
Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)
| Package | Pins | Download |
|---|---|---|
| SOT-SC70 (DCK) | 5 | View options |
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