INA199 is a 26-V, Bi-Directional, Zero-Drift, Low- or High-Side, Voltage Output Current Shunt Monitor

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The INA199 series of voltage output current shunt monitors can sense drops across shunts at common-mode voltages from -0.3V to 26V, independent of the supply voltage.

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Three fixed gains are available: 50V/V (INA199A1/B1), 100V/V (INA199A2/B2), and 200V/V. The low offset (±150µV maximum) of the Zerø-Drift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale. They operate from a single +2.7V to +26V power supply, drawing a maximum of 100µA of supply current, and all versions are specified from –40°C to +105°C. Additionally, the variations are offered in both SC70 and thin QFN-10 packages.

In terms of accuracy, the INA199 series has ±1.5% gain error (maximum over temperature), as well as 0.5µV/°C offset drift (maximum); it also has 10ppm/°C gain drift maximum.

Applications for INA199 include: notebook computers, cell phones, telecom equipment, power management, battery chargers, and welding equipment.

By: Rachel Kalina

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