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Texas Instruments INA21x/INA21x-Q1 Current-Shunt Monitors

Texas Instruments INA21x/INA21x-Q1 Bidirectional Zero-Drift Current-Shunt Monitors are voltage-output, current-shunt monitors that can sense drops across shunts at common-mode voltages from -0.3V to 26V. This is done independent of the supply voltage. These are available in five fixed gains. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale. These devices from Texas Instruments operate from a single 2.7V to 26V power supply. These devices draw a maximum of 100µA of supply current. All versions are specified over the extended operating temperature range of  -40°C to +125°C. They are offered in an SC70 package or thin UQFN package. The INA21x-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Accuracy
    • ±1% gain error (max. over temperature)
    • 0.5µV/°C offset drift (max.)
    • 10ppm/°C gain drift (max.)
  • Choice of Gains
    • INA210: 200V/V
    • INA211: 500V/V
    • INA212: 1000V/V
    • INA213: 50V/V
    • INA214: 100V/V
    • INA215: 75V/V
  • -0.3V to 26V wide common-mode range
  • ±35µV (max., INA210) offset voltage (enables shunt drops of 10mV full-scale)
  • 100µA (max.) quiescent current 
  • SC70 package for all models
  • Thin UQFN package: INA210, INA213, INA214

Applications

  • Notebook computers
  • Cell phones
  • Telecom equipment
  • Power management
  • Battery chargers
  • Welding equipment

Datasheets

Functional Block Diagram

Block Diagram - Texas Instruments INA21x/INA21x-Q1 Current-Shunt Monitors
Opublikowano: 2015-05-28 | Zaktualizowano: 2025-02-05