The LTA199 series of bidirectional zero-drift current sense amplifier can sense drops across shunts at common-mode voltages from -0.3V to 30V, independent of the supply voltage. Unidirectional operation allows the LTA199 series to measure currents through a resistive shunt in one direction, while bidirectional operation allows the device to measure currents through a resistive shunt in two directions. The low offset of the zerodrift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale.

The LTA199 series operates from a single +2.7V to +30V power supply, drawing a maximum of 100μA of supply current. The device is specified from –40℃ to +105℃, and offered in SC70-6L and TQFN-10L packages.

• Wide common-mode range: -0.3V to 30V

• Maximum ±150μV Offset voltage (LTA199G1) at Vcm=0V

• Accuracy

  – Maximum ±1% Gain Error

  – Maximum 1μV/℃ Offset Drift

  – Maximum 10ppm/℃ Gain Drift

• Choice of Gains:

  – LTA199G1: 50V/V

  – LTA199G2: 100V/V

  – LTA199G3: 200V/V

• Quiescent Current: Maximum 250μA

• Package: SC70-6L, TQFN-10L(Contact with sales if needed)

• Power Management

• Battery Chargers

• Electrical Cigarette

• Smart Phones and Tablets

• Notebook Computers

• Telecom Equipments

• Welding Equipments