INA241B Overview
Description
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).
Key Features
- Enhanced PWM rejection optimized for systems subject to switching common-mode voltages – Supports switching frequencies up to 125 kHz
- Wide common-mode voltage: – Operational voltage: -5 V to +110 V – Survival voltage: -20 V to +120 V
- Bidirectional operation
- High small signal bandwidth: 1.1 MHz (at all gains)
- Slew rate: 8 V/µs
- Step response settling time to 1%: 1 µs
- Excellent CMRR – 166 dB DC-CMRR – 104 dB AC-CMRR at 100 kHz – 89 dB AC-CMRR at 1 MHz
- Accuracy: – Gain error (maximum)
- Version A: ±0.01%, ±1 ppm/°C drift
- Version B: ±0.1%, ±5 ppm/°C drift – Offset voltage (maximum)
