General Description
The MAX4069–MAX4072 low-cost, bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. They feature up to 24V input common-mode voltage range, low 100µA supply current (which drops to only 10µA in shutdown), and a total output error of less than 1.5%. The wide 1.35V to 24V input common-mode range is independent of the supply voltage, ensuring that the current-sense feedback remains accurate even when connected to a battery pack in deep discharge.

FEATUREs
♦ Bidirectional, Compact, Current-Sense Solution
♦ Total Output Error Less than 1.5%
♦ Selectable Gain of 50V/V or 100V/V
♦ Wide 1.35V to 24V Common-Mode Range
   Independent of Supply Voltage
♦ 2.7V to 24V Single-Supply Operation
♦ Internal Precision Reference
   Adjustable (MAX4069)
   2.50V (MAX4070)
   1.50V (MAX4071)
♦ Low 100µA Supply Current
♦ 10µA Supply Current in Shutdown
♦ Available in Space-Saving Packages
   8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
   8-Pin µMAX (MAX4070/MAX4071MAX4072)
   10-Pin µMAX (MAX4069)

APPLICATIONs
   Notebook Fuel Gauging
   Smart-Battery Packs/Chargers
   Motor Control
   Power-Management Systems
   Cell-Phone Battery-Current Monitoring