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Ultra-Precise Current Sense Amplifier - 20 V/V Gain

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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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