login
Texas Instruments INA241x Current Sense Amplifiers are ultra-precise, bidirectional current sense amplifiers than can measure voltage drops across shunt resistors. This measurement is done over a wide common-mode range from –5V to 110V, independent of the supply voltage. The high-precision current measurement is achieved through a combination of small gain error (±0.01%, maximum), low offset voltage (±10µV, maximum), and a high DC CMRR (typical 166dB). The Texas Instruments 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.
Features
- Enhanced PWM rejection optimized for systems subject to switching common-mode voltages
- Supports switching frequencies up to 125kHz
- Wide common-mode voltage
- −5V to +110V operational voltage
- −20V to +120V survival voltage
- Bidirectional operation
- High small signal bandwidth (1.1MHz (at all gains))
- 8V/µs slew rate
- Step response settling time to 1% (1µs)
- Excellent CMRR
- 166dB DC-CMRR
- 104dB AC-CMRR at 100kHz
- 89 dB AC-CMRR at 1MHz
- Accuracy
- Gain error (maximum)
- Version A: ±0.01%, ±1ppm/°C drift
- Version B: ±0.1%, ±5ppm/°C drift
- Offset voltage (maximum)
- Version A: ±10µV, ±0.1µV/°C drift
- Version B: ±150µV, ±0.5µV/°C drift
- Gain error (maximum)
- Available gains
- INA241A1, INA241B1: 10V/V
- INA241A2, INA241B2: 20V/V
- INA241A3, INA241B3: 50V/V
- INA241A4, INA241B4: 100V/V
- INA241A5, INA241B5: 200V/V
- SOT23-8, VSSOP-8 package options
Block Diagram
more information: https://www.ti.com/product/INA241A
RELATED POSTS
30 June, 2017 Bluey, BLE Development Board Supports NFC
12 April, 2018 IR Remote Control Detective based on ATtiny85
28 November, 2018 u-blox announces NB-IoT module ready for 3GPP Rel 14 and 5G
24 May, 2017 Electrolytic + polymer = the hybrid capacitor
10 September, 2015 Phoenix EH basic is more than just a “basic” enclosure
25 September, 2019 HealthyPi v4 – Unplugged, monitors vital signs using ESP32
