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The LT199 series of bidirectional zero-drift current sense amplifier can sense drops across shunts at common-mode voltages from -0.3V to 26V, independent of the supply voltage. Unidirectional operation allows the LT199 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 LT199 series operates from a single +2.5V to +18V 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 26V
  
• Maximum 180μV Offset voltage (LT199G2/G3) Enable Shunt Drops of 10mV Full-scale
  
• Accuracy
  

• Choice of Gains:
  

• Quiescent Current: Maximum 100μA
  
• Package: SC70-6L, TQFN-10L
  

• Power Management
  
• Battery Chargers
  
• Electrical Cigarette
  
• Smart Phones and Tablets
  
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• Welding Equipments