MAX472 Precision, High-Side Current-Sense Amplifier

SKU: VNA2536
R32.50
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Delivery: 2-5 working days
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Description:
The MAX471/MAX472 are complete, bidirectional, high-side  current-sense  amplifiers  for  portable  PCs,  tele-phones,  and  other  systems  where  battery/DC power-line  monitoring  is  critical.  High-side  powerline monitoring  is  especially  useful  in  battery-powered  systems,  since  it  does  not  interfere  with  the  ground  paths of  the  battery  chargers  or  monitors  often  found  in “smart” batteries. The MAX471 has an internal 35mΩcurrent-sense resistor and measures battery currents up to ±3A. For applications  requiring  higher  current  or  increased  flexibility, the MAX472 functions with external sense and gain-set-ting  resistors.  Both  devices  have  a  current  output  that can  be  converted  to  a  ground-referred  voltage  with  a single  resistor,  allowing  a  wide  range  of  battery  volt-ages and currents. An  open-collector  SIGN  output  indicates  current flow direction,  so  the  user  can  monitor  whether  a  battery  is being  charged  or  discharged.  Both  devices  operate from  3V  to  36V,  draw  less  than  100μA  over  temperature, and include a 18μA max shutdown mode.
Features:
  • Complete High-Side Current Sensing
  • Precision Internal Sense Resistor (MAX471)
  • 2% Accuracy Over Temperature
  • Monitors Both Charge and Discharge
  • 3A Sense Capability with Internal Sense Resistor(MAX471)
  • Higher Current-Sense Capability with External Sense Resistor (MAX472)
  • 100μA Max Supply Current
  • 18μA Max Shutdown Mode
  • 3V to 36V Supply Operation
  • 8-Pin DIP/SO Packages
VNA2536
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