描述

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.



优势和特点

  • 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



应用

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



友情链接 百度