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- Ultra-Precise Current Sense Amplifier - 20 V/V Gain
Texas Instruments INA290 Ultra-Precise Current Sense Amplifiers can measure voltage drops across shunt resistors over a wide common-mode range from 2.7V to 120V. It is in a highly space-efficient SC-70 package with a PCB footprint of only 2.0mm × 2.1mm. The ultra-precise current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±12µV (maximum), a small gain error of ±0.1% (maximum), and a high DC CMRR of 160dB (typical). The INA290 is not only designed for DC current measurement but also high-speed applications (like fast overcurrent protection, for example) with high bandwidth of 1MHz (at a gain of 20V/V) and an 85dB AC CMRR (at 50kHz).
The INA290 operates from a single 2.7V to 20V supply and draws a 370µA supply current (typical).
- Number of Channels: 1 Channel
- GBP - Gain Bandwidth Product: 1100 kHz
- Vcm - Common Mode Voltage: 2.7V to 120V
- CMRR - Common Mode Rejection Ratio: 140 dB
- Ib - Input Bias Current: 20 uA
- Vos - Input Offset Voltage: 5 uV
- Supply Voltage Max: 20V
- Supply Voltage Min: 2.7V
- Operating Supply Current: 370 uA
- Minimum Operating Temperature: -40C
- Maximum Operating Temperature: +125C
- Mounting Style: SMD/SMT
- Package/Case: SC-70-5
- Shutdown: No Shutdown
- en - Input Voltage Noise Density: 50 nV/sqrt Hz
- Gain Error: 0.02%
- Gain V/V: 20 V/V
- Settling Time: 5us, 9us
- SR - Slew Rate: 2 V/us
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