The LT199GxA series of bidirectional zero-drift current sense amplifier can sense drops

across shunts at common-mode voltages from -0.3V to 18V, independent of the supply

voltage. Unidirectional operation allows the LT199GxA 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 full-scale.

The LT199GxA series operates from a single +2.5V to +18V power supply, drawing a

maximum of 300μA 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 18V
  
• Maximum 300μV Offset voltage (LT199G2A/G3A) Enable Shunt Drops of 10mV Fullscale
  
• Accuracy
  – Maximum ±1% Gain Error
  – Maximum 1μV/℃ Offset Drift
  – Maximum 15ppm/℃ Gain Drift
  
• Choice of Gains:
  – LT199G1A: 50V/V
  – LT199G2A: 100V/V
  – LT199G3A: 200V/V
  
• Quiescent Current: Maximum 300μA
  
• Package: SC70-6L, TQFN-10L
  

• Power Management
  
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