Packaging information
| Package | Pins SOT-23-THN (DDF) | 8 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the INA241A
- 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)
- Version A: ±10 µV, ±0.1 µV/°C drift
- Version B: ±150 µV, ±0.5 µV/°C drift
- Gain error (maximum)
- Available gains:
- INA241A1, INA241B1 : 10 V/V
- INA241A2, INA241B2 : 20 V/V
- INA241A3, INA241B3 : 50 V/V
- INA241A4, INA241B4 : 100 V/V
- INA241A5, INA241B5 : 200 V/V
- Package options: SOT23-8, VSSOP-8, SOIC-8, VSSOP-10
Description for the INA241A
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.