Ultra-Precise Current Sense Amplifier - 50 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).

Features & Specs

* 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: 3 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: 50 V/V * Settling Time: 5us, 9us * SR - Slew Rate: 2 V/us