描述
The LTA181 series of bidirectional zero-drift current sense amplifier is designed for cost optimized solution, which can sense drops across shunts at common-mode voltages from –0.2 V to 30 V,
independent of the supply voltage. Unidirectional operation allows the LTA181 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 zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10mV fullscale.
The LTA181 series operates from a single +2.7 V to +5.5 V power supply, drawing a maximum of 180 μA of supply current. The device is specified from –40℃ to +105℃, and offered in SOT23-6L and SC70-6L packages.
优势和特点
Wide common-mode range: -0.2 V to 30 V
Maximum ±150 μV Offset voltage at Vcm = 0V
Accuracy
– Maximum ±1 % Gain Error
– Maximum 1.5 μV/℃ Offset Drift
– Maximum 20 ppm/℃ Gain Drift
Choice of Gains:
– LTA181A1: 20 V/V
– LTA181A2: 50 V/V
– LTA181A3: 100 V/V
– LTA181A4: 200 V/V
Quiescent Current: Maximum 180 μA
Package: SOT23-6L, SC70-6L
应用
wer Management
Battery Chargers
Electrical Cigarette
Smart Phones and Tablets
Notebook Computers
Telecom Equipments
Welding Equipments
