The INA241x is an ultra-precise, bidirectional current sense amplifier than can measure voltage drops across shunt resistors over a wide common-mode range from –5 V to 110 V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of low offset voltage (±10 µV, maximum), small gain error (±0.01%, maximum) and a high DC CMRR (typical 166 dB). The INA241x is designed for high voltage, bidirectional measurements in switching systems that see large common-mode voltage transients at the device’s inputs. The enhanced PWM rejection circuitry inside the INA241x ensures minimal signal disturbance at the output due to the common-mode voltage transitions at the input.
The INA241x operates from a single 2.7 V to 20 V supply, drawing 2.5 mA of supply current. The INA241x is available in five gain options: 10 V/V, 20 V/V, 50 V/V, 100 V/V, and 200 V/V. Multiple gain options allow for optimization between available shunt resistor values and wide output dynamic range requirements.
The INA241x is specified over operating temperature range of −40°C to +125°C.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | INA241x–5 V to 110 V, Bidirectional, Ultra-Precise Current Sense AmplifierWith Enhanced PWM Rejection datasheet (Rev. C) | PDF | HTML | 20 Oct 2023 |
| Application note | Current Sensing in Collaborative and Industrial Robotic Arms (Rev. B) | PDF | HTML | 24 Jul 2023 | |
| Application note | Current Mode Control in Switching Power Supplies (Rev. E) | PDF | HTML | 12 Apr 2023 | |
| Application note | Current Sensing in Mobile Robots | PDF | HTML | 29 Nov 2022 | |
| EVM User's guide | INA241xEVM User's Guide (Rev. A) | PDF | HTML | 17 Nov 2022 | |
| Certificate | INA241BEVM EU RoHS Declaration of Conformity (DoC) | 16 Nov 2022 | ||
| Analog Design Journal | Second-sourcing options for small-package amplifiers | 26 Mar 2018 |
For additional terms or required resources, click any title below to view the detail page where available.
INA241AEVM 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 INA241x with inputs up to 110-V common-mode and 10-A (onboard shunt) input capability.
Each board (...)
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
| SOT-23-THN (DDF) | 8 | View options |
| VSSOP (DGK) | 8 | View options |
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